转载请注明出处:http://blog.csdn.net/stevenhu_223/article/details/42520233
本博文相关的Demo下载链接:http://download.csdn.net/detail/stevenhu_223/8340451
前言:在开发Android第三方App应用的过程中,特别是涉及到网络请求的App,都会涉及到解析后台返回的数据。而后台返回的数据无非就是两种格式,xml和json格式。如何更好的方便有效的解析这些后台返回的数据,对我们开发者来说是很重要的。接下来将介绍以下几种笔者比较常用的数据解析方式。
一。simple-xml第三方jar包解析xml格式数据
simple-xml是一个xml和对象互转操作工具包,官方网址为:http://simple.sourceforge.net/,jar包可以到官网上下载,笔者使用的是目前最新版本的jar包,名为simple-xml-2.7.1.jar;废话不多说了,代码才是最真实靠谱的力证。
下面是整个Demo工程文件截图,如下图:
该Demo主要是通过simple-xml解析assets目录中的data.xml文件内容数据,然后显示出来;
1.data.xml文件内容如下:
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- <?xml version="1.0" encoding="utf-8"?>
- <resources>
- <?xml version="1.0" encoding="utf-8"?>
- <dataContent>
- <group>
- <groupID>1</groupID>
- <groupName>第一组</groupName>
- <member>
- <name>张三</name>
- <age>22</age>
- </member>
- <member>
- <name>李四</name>
- <age>24</age>
- </member>
- <member>
- <name>欧阳雪</name>
- <age>18</age>
- </member>
- </group>
- <group>
- <groupID>2</groupID>
- <groupName>第二组</groupName>
- <member>
- <name>司徒静</name>
- <age>19</age>
- </member>
- <member>
- <name>叶笙</name>
- <age>26</age>
- </member>
- <member>
- <name>杨风</name>
- <age>25</age>
- </member>
- </group>
- <group>
- <groupID>3</groupID>
- <groupName>第三组</groupName>
- <member>
- <name>王龙</name>
- <age>32</age>
- </member>
- <member>
- <name>西门胜男</name>
- <age>21</age>
- </member>
- <member>
- <name>张铬</name>
- <age>45</age>
- </member>
- </group>
- </dataContent>
-
- </resources>
<?xml version="1.0" encoding="utf-8"?>
<resources>
<?xml version="1.0" encoding="utf-8"?>
<dataContent>
<group>
<groupID>1</groupID>
<groupName>第一组</groupName>
<member>
<name>张三</name>
<age>22</age>
</member>
<member>
<name>李四</name>
<age>24</age>
</member>
<member>
<name>欧阳雪</name>
<age>18</age>
</member>
</group>
<group>
<groupID>2</groupID>
<groupName>第二组</groupName>
<member>
<name>司徒静</name>
<age>19</age>
</member>
<member>
<name>叶笙</name>
<age>26</age>
</member>
<member>
<name>杨风</name>
<age>25</age>
</member>
</group>
<group>
<groupID>3</groupID>
<groupName>第三组</groupName>
<member>
<name>王龙</name>
<age>32</age>
</member>
<member>
<name>西门胜男</name>
<age>21</age>
</member>
<member>
<name>张铬</name>
<age>45</age>
</member>
</group>
</dataContent>
</resources>
通过上面的文件内容,我们知道,这个文件内容主要有三组数据,每组数据有个三个成员组,每个成员组都有名字和年龄这两个子元素。Demo中将这些解析出来内容通过ExpandableListView显示出来。
2.主页面MainActivity代码如下:
package com.steven.android.simple.xml.activity;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.simpleframework.xml.core.Persister;
import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.Menu;
import android.widget.ExpandableListView;
import com.steven.android.simple.xml.adapter.ExpandAdapter;
import com.steven.android.simple.xml.parse.DataParseResponse;
/**
* 描述:主页面
* @author stevenhu223
*
*/
public class MainActivity extends Activity {
private final String TAG = "MainActivity";
private ExpandableListView mExpandableListView;
private ExpandAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mExpandableListView = (ExpandableListView) findViewById(R.id.expanlist_content);
try {
matchAndParseData();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/**
* 匹配获取和解析xml文件内容
* @throws Exception
*/
private void matchAndParseData() throws Exception {
InputStream inputStream = getResources().getAssets().open("data.xml");
String dataContent = convertStreamToString(inputStream);
String content = "";
//正则表达式匹配
Pattern DATA_PATTERN= Pattern.compile("[\\S\\s]*(<dataContent>[\\s\\S]*</dataContent>)[\\s\\S]*");
Matcher matcher = DATA_PATTERN.matcher(dataContent);
if (matcher.matches()) {
//获取包含dataContent元素的内容
content = matcher.group(1);
}
if (!TextUtils.isEmpty(content)) {
DataParseResponse dataResponse = parseToBean(DataParseResponse.class, content);
mAdapter = new ExpandAdapter(this, dataResponse.mGroupEntities);
mExpandableListView.setAdapter(mAdapter);
}
}
/**
* 将xml文件内容解析成实体类
* @param type
* @param data
* @return
*/
private <T> T parseToBean(Class<T> type , String data) {
try {
return new Persister().read(type, data, false);
} catch (Exception e) {
Log.e(TAG, "parse Data error", e);
throw new RuntimeException(e);
}
}
/**
* 输入流转字符串
* @param is
* @return
*/
public String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
上面的代码中,parseToBean方法的功能就是将xml格式数据解析成对应的实体类,Persister类是simple-xml包中的类。通过调用parseToBean函数将xml内容数据解析封装成DataParseResponse对象,接下来我们看看DataParseResponse的代码。
3.DataParseResponse.java文件代码如下:
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- package com.steven.android.simple.xml.parse;
-
- import org.simpleframework.xml.ElementList;
- import org.simpleframework.xml.Root;
-
- import com.steven.android.simple.xml.entity.GroupEntity;
-
- import java.util.List;
-
-
-
-
-
-
-
- @Root(name = "dataContent")
- public class DataParseResponse {
- @ElementList(inline=true,required=false)
- public List<GroupEntity> mGroupEntities;
- }
package com.steven.android.simple.xml.parse;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
import com.steven.android.simple.xml.entity.GroupEntity;
import java.util.List;
/**
* 描述:解析数据响应类
* 此处的dataContent要对应xml文件中的dataContent元素
* @author stenvenhu223
*
*/
@Root(name = "dataContent")
public class DataParseResponse {
@ElementList(inline=true,required=false)
public List<GroupEntity> mGroupEntities;
}
通过上面的代码我们知道,simple-xml包解析xml格式数据成实体类时,实体类中对应需要解析的xml格式数据元素名的注解是非常重要的。这些注释都是来自simple-xml包的。DataParseResponse类中的@Root(name = "NewDataSet")注解表示的是从xml数据根元素dataContent。由于group元素在根元素dataContent中是以数组的形式存在的,所以这里的集合mGroupEntities就表示解析的group元素数组内容集合,必然的它的注解也应为@ElementList(inline=true,required=false)。接下来,我们看看GroupEntity实体类的代码。
4.GroupEntity.java文件代码如下:
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- package com.steven.android.simple.xml.entity;
-
- import java.util.List;
-
- import org.simpleframework.xml.Element;
- import org.simpleframework.xml.ElementList;
- import org.simpleframework.xml.Root;
- @Root(name="group")
- public class GroupEntity {
- @Element(name="groupID") public String groupId;
- @Element(name="groupName") public String groupName;
- @ElementList(inline=true,required=false)
- public List<MemberEntity> memberEntities;
-
- }
package com.steven.android.simple.xml.entity;
import java.util.List;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
@Root(name="group")
public class GroupEntity {
@Element(name="groupID") public String groupId;
@Element(name="groupName") public String groupName;
@ElementList(inline=true,required=false)
public List<MemberEntity> memberEntities;
}
代码中,@Root(name="group")对应的是xml文件中的group元素。@Element(name="groupID")注解对应的是group元素的子元素groupID,@Element(name="groupName")注解对应的是group元素的子元素groupName。而member元素在group元素中是以数组形式存在的,所以它在GroupEntity中必然也以集合的形式存在,注解也应该为@ElementList(inline=true,required=false);接着,我们解析看看实体类MemberEntity的代码。
5.MemberEntity.java文件代码如下:
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- @Root(name="member")
- public class MemberEntity {
- @Element(required=false) public String name;
- @Element(required=false) public String age;
- }
@Root(name="member")
public class MemberEntity {
@Element(required=false) public String name;
@Element(required=false) public String age;
}
MemberEntity代码中的代码注释这里就不多说了,原理和其他的实体类是一致的。
既然要把解析出来的数据通过ExpandableListView显示出来,那么我们就需要创建ExpandableListView对应的适配器,然后填充解析后的实体类形式数据。我们来看看适配器ExpandAdapter的代码。
6.ExpandAdapter.java文件代码如下:
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- package com.steven.android.simple.xml.adapter;
-
- import java.util.List;
- import android.content.Context;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseExpandableListAdapter;
- import android.widget.TextView;
- import com.steven.android.simple.xml.activity.R;
- import com.steven.android.simple.xml.custom.ViewHolder;
- import com.steven.android.simple.xml.entity.GroupEntity;
- import com.steven.android.simple.xml.entity.MemberEntity;
-
- public class ExpandAdapter extends BaseExpandableListAdapter{
-
- private List<GroupEntity> mGroupEntities;
- private LayoutInflater mInflater;
-
- public ExpandAdapter(Context context, List<GroupEntity> list) {
- mGroupEntities = list;
- mInflater = LayoutInflater.from(context);
- }
-
- @Override
- public Object getChild(int groupPosition, int childPosition) {
-
- return mGroupEntities.get(groupPosition).memberEntities.get(childPosition);
- }
-
- @Override
- public long getChildId(int groupPosition, int childPosition) {
-
- return childPosition;
- }
-
- @Override
- public View getChildView(int groupPosition, int childPosition,
- boolean isLastChild, View convertView, ViewGroup parent) {
- if (convertView == null) {
- convertView = mInflater.inflate(R.layout.item_member_content, parent, false);
- }
- TextView text_member_content = ViewHolder.get(convertView, R.id.text_member_content);
- MemberEntity entity = (MemberEntity)getChild(groupPosition, childPosition);
- text_member_content.setText(entity.name);
- return convertView;
- }
-
- @Override
- public int getChildrenCount(int groupPosition) {
-
- return mGroupEntities.get(groupPosition).memberEntities.size();
- }
-
- @Override
- public Object getGroup(int groupPosition) {
-
- return mGroupEntities.get(groupPosition);
- }
-
- @Override
- public int getGroupCount() {
-
- return mGroupEntities.size();
- }
-
- @Override
- public long getGroupId(int groupPosition) {
-
- return groupPosition;
- }
-
- @Override
- public View getGroupView(int groupPosition, boolean isExpanded,
- View convertView, ViewGroup parent) {
- if (convertView == null) {
- convertView = mInflater.inflate(R.layout.item_group_content, parent, false);
- }
- TextView text_group_cotent = ViewHolder.get(convertView, R.id.text_group_content);
- GroupEntity entity = (GroupEntity)getGroup(groupPosition);
- text_group_cotent.setText(entity.groupName);
- return convertView;
- }
-
- @Override
- public boolean hasStableIds() {
-
- return true;
- }
-
- @Override
- public boolean isChildSelectable(int groupPosition, int childPosition) {
-
- return true;
- }
-
- }
package com.steven.android.simple.xml.adapter;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
import com.steven.android.simple.xml.activity.R;
import com.steven.android.simple.xml.custom.ViewHolder;
import com.steven.android.simple.xml.entity.GroupEntity;
import com.steven.android.simple.xml.entity.MemberEntity;
public class ExpandAdapter extends BaseExpandableListAdapter{
private List<GroupEntity> mGroupEntities;
private LayoutInflater mInflater;
public ExpandAdapter(Context context, List<GroupEntity> list) {
mGroupEntities = list;
mInflater = LayoutInflater.from(context);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return mGroupEntities.get(groupPosition).memberEntities.get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_member_content, parent, false);
}
TextView text_member_content = ViewHolder.get(convertView, R.id.text_member_content);
MemberEntity entity = (MemberEntity)getChild(groupPosition, childPosition);
text_member_content.setText(entity.name);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return mGroupEntities.get(groupPosition).memberEntities.size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return mGroupEntities.get(groupPosition);
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return mGroupEntities.size();
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_group_content, parent, false);
}
TextView text_group_cotent = ViewHolder.get(convertView, R.id.text_group_content);
GroupEntity entity = (GroupEntity)getGroup(groupPosition);
text_group_cotent.setText(entity.groupName);
return convertView;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
所以,当在MainActivity中通过调用parseToBean方法完成解析xml数据后,将解析得到的实体类填充到适配器中,然后通过ExpandableListView显示出来。工程中的ViewHolder是自定义类,它的存在,是为了避免在Adapter类中频繁地创建ViewHolder。
7.ViewHolder.java文件代码如下:
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- package com.steven.android.sax.xml.custom;
-
- import android.util.SparseArray;
- import android.view.View;
-
- public class ViewHolder {
- @SuppressWarnings("unchecked")
- public static <T extends View> T get(View view, int id) {
- SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();
- if (viewHolder == null) {
- viewHolder = new SparseArray<View>();
- view.setTag(viewHolder);
- }
- View childView = viewHolder.get(id);
- if (childView == null) {
- childView = view.findViewById(id);
- viewHolder.put(id, childView);
- }
- return (T) childView;
- }
- }
package com.steven.android.sax.xml.custom;
import android.util.SparseArray;
import android.view.View;
public class ViewHolder {
@SuppressWarnings("unchecked")
public static <T extends View> T get(View view, int id) {
SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();
if (viewHolder == null) {
viewHolder = new SparseArray<View>();
view.setTag(viewHolder);
}
View childView = viewHolder.get(id);
if (childView == null) {
childView = view.findViewById(id);
viewHolder.put(id, childView);
}
return (T) childView;
}
}
二。SAX解析xml格式数据。
前面介绍了如何借助simple-xml包解析xml数据。这里,将要介绍不需要通过第三方jar包,如何通过SAX有效地去解析xml数据。关于SAX的介绍,笔者在这里就不再累赘了,相信很多程序猿都接触过了。
下面是整个Demo工程文件截图,如下图:
该工程代码和simple-xml工程代码一样,也是将解析的xml数据通过ExpandableListView显示出来。assets目录中的data.xml文件内容、ExpandAdapter类、相关文件布局和simple-xml工程差不多都是一样的,这里就不贴出来了。不过实体类是有变化的, 不再是公共成员变量形式存在,而是私有变量形式存在,以set、get形式赋值和取值。下面看看实体类的代码。
1.GroupEntity.java文件代码如下:
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- package com.steven.android.sax.xml.entity;
-
- import java.util.ArrayList;
- import java.util.List;
-
- public class GroupEntity {
- private String groupId;
- private String groupName;
- private List<MemberEntity> memberEntities = new ArrayList<MemberEntity>();;
-
- public String getGroupId() {
- return groupId;
- }
-
- public void setGroupId(String groupId) {
- this.groupId = groupId;
- }
-
- public String getGroupName() {
- return groupName;
- }
-
- public void setGroupName(String groupName) {
- this.groupName = groupName;
- }
-
- public List<MemberEntity> getMemberEntities() {
- return memberEntities;
- }
-
- public void setMemberEntities(List<MemberEntity> memberEntities) {
- this.memberEntities = memberEntities;
- }
-
- }
package com.steven.android.sax.xml.entity;
import java.util.ArrayList;
import java.util.List;
public class GroupEntity {
private String groupId;
private String groupName;
private List<MemberEntity> memberEntities = new ArrayList<MemberEntity>();;
public String getGroupId() {
return groupId;
}
public void setGroupId(String groupId) {
this.groupId = groupId;
}
public String getGroupName() {
return groupName;
}
public void setGroupName(String groupName) {
this.groupName = groupName;
}
public List<MemberEntity> getMemberEntities() {
return memberEntities;
}
public void setMemberEntities(List<MemberEntity> memberEntities) {
this.memberEntities = memberEntities;
}
}
2.MemberEntity.java文件代码如下:
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- package com.steven.android.sax.xml.entity;
-
- public class MemberEntity {
-
- private String name;
- private String age;
-
- public String getName() {
- return name;
- }
-
- public void setName(String name) {
- this.name = name;
- }
-
- public String getAge() {
- return age;
- }
-
- public void setAge(String age) {
- this.age = age;
- }
-
- }
package com.steven.android.sax.xml.entity;
public class MemberEntity {
private String name;
private String age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
接下来,我们看看主页面的代码。
3.MainActivity.java文件代码如下:
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- package com.steven.android.sax.xml.activity;
-
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.util.List;
- import java.util.regex.Matcher;
- import java.util.regex.Pattern;
- import android.app.Activity;
- import android.os.Bundle;
- import android.text.TextUtils;
- import android.view.Menu;
- import android.widget.ExpandableListView;
- import com.steven.android.sax.xml.adapter.ExpandAdapter;
- import com.steven.android.sax.xml.entity.GroupEntity;
- import com.steven.android.sax.xml.handler.DataParseHandler;
- import com.steven.android.sax.xml.util.XmlParserUtil;
-
-
-
-
-
- public class MainActivity extends Activity {
-
- private ExpandableListView mExpandableListView;
- private ExpandAdapter mAdapter;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- mExpandableListView = (ExpandableListView) findViewById(R.id.expanlist_content);
- try {
- matchAndParseXmlData();
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- }
-
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
-
- getMenuInflater().inflate(R.menu.main, menu);
- return true;
- }
-
-
-
-
-
- private void matchAndParseXmlData() throws Exception {
- InputStream inputStream = getResources().getAssets().open("data.xml");
- String dataContent = convertStreamToString(inputStream);
- String content = "";
- Pattern DATA_PATTERN= Pattern.compile("[\\S\\s]*(<dataContent>[\\s\\S]*</dataContent>)[\\s\\S]*");
- Matcher matcher = DATA_PATTERN.matcher(dataContent);
- if (matcher.matches()) {
- content = matcher.group(1);
- }
- if (!TextUtils.isEmpty(content)) {
- DataParseHandler handler = new DataParseHandler();
- XmlParserUtil.parserXMLByHandler(handler, content);
- List<GroupEntity> mGroupEntities = handler.getResult();
- mAdapter = new ExpandAdapter(this, mGroupEntities);
- mExpandableListView.setAdapter(mAdapter);
- }
- }
-
-
-
-
-
-
- public String convertStreamToString(InputStream is) {
-
- BufferedReader reader = new BufferedReader(new InputStreamReader(is));
- StringBuilder sb = new StringBuilder();
- String line = null;
- try {
- while ((line = reader.readLine()) != null) {
- sb.append(line);
- }
- } catch (IOException e) {
- e.printStackTrace();
- } finally {
- try {
- is.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- return sb.toString();
-
- }
-
- }
package com.steven.android.sax.xml.activity;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Menu;
import android.widget.ExpandableListView;
import com.steven.android.sax.xml.adapter.ExpandAdapter;
import com.steven.android.sax.xml.entity.GroupEntity;
import com.steven.android.sax.xml.handler.DataParseHandler;
import com.steven.android.sax.xml.util.XmlParserUtil;
/**
* 描述:主页面
* @author stevenhu223
*
*/
public class MainActivity extends Activity {
private ExpandableListView mExpandableListView;
private ExpandAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mExpandableListView = (ExpandableListView) findViewById(R.id.expanlist_content);
try {
matchAndParseXmlData();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/**
* 匹配获取和解析xml文件内容
* @throws Exception
*/
private void matchAndParseXmlData() throws Exception {
InputStream inputStream = getResources().getAssets().open("data.xml");
String dataContent = convertStreamToString(inputStream);
String content = "";
Pattern DATA_PATTERN= Pattern.compile("[\\S\\s]*(<dataContent>[\\s\\S]*</dataContent>)[\\s\\S]*");
Matcher matcher = DATA_PATTERN.matcher(dataContent);
if (matcher.matches()) {
content = matcher.group(1);
}
if (!TextUtils.isEmpty(content)) {
DataParseHandler handler = new DataParseHandler();
XmlParserUtil.parserXMLByHandler(handler, content);
List<GroupEntity> mGroupEntities = handler.getResult();
mAdapter = new ExpandAdapter(this, mGroupEntities);
mExpandableListView.setAdapter(mAdapter);
}
}
/**
* 输入流转字符串
* @param is
* @return
*/
public String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
在MainActivity中,matchAndParseData方法实现SAX解析xml数据。SAX解析xml数据,其实重点是如何创建继承DefaultHandler2的类。我们来看看工程中创建的DataParseHandler类。
4.DataParseHandler.java文件代码如下:
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- package com.steven.android.sax.xml.handler;
-
- import java.util.ArrayList;
- import org.xml.sax.Attributes;
- import org.xml.sax.InputSource;
- import org.xml.sax.SAXException;
- import org.xml.sax.ext.DefaultHandler2;
- import com.steven.android.sax.xml.entity.GroupEntity;
- import com.steven.android.sax.xml.entity.MemberEntity;
-
-
-
-
-
-
- public class DataParseHandler extends DefaultHandler2 {
-
- InputSource mInputSource;
- String nodeName;
- public GroupEntity groupEntity;
- public MemberEntity memberEntity;
- public ArrayList<GroupEntity> groupEntities;
-
- StringBuffer cData;
-
- public DataParseHandler() {
- cData = new StringBuffer();
- groupEntities = new ArrayList<GroupEntity>();
- }
-
- @Override
- public void characters(char[] ch, int start, int length)
- throws SAXException {
-
- if (nodeName != null && nodeName.equals("groupID")) {
- String data = new String(ch, start, length);
- cData.append(data);
- super.characters(ch, start, length);
- } else if (nodeName != null && nodeName.equals("groupName")) {
- String data = new String(ch, start, length);
- cData.append(data);
- super.characters(ch, start, length);
- } else if (nodeName != null && nodeName.equals("name")) {
- String data = new String(ch, start, length);
- cData.append(data);
- super.characters(ch, start, length);
- } else if (nodeName != null && nodeName.equals("age")) {
- String data = new String(ch, start, length);
- cData.append(data);
- super.characters(ch, start, length);
- }
- }
-
- @Override
- public void startElement(String uri, String localName, String name,
- Attributes atts) throws SAXException {
- nodeName = localName;
- if (localName.equals("group")) {
-
- groupEntity = new GroupEntity();
- } else if (localName.equals("member")){
-
- memberEntity = new MemberEntity();
- } else if (localName.equals("groupID")) {
- startCDATA();
- } else if (localName.equals("groupName")) {
- startCDATA();
- } else if (localName.equals("name")) {
- startCDATA();
- } else if (localName.equals("age")) {
- startCDATA();
- }
-
- }
-
- @Override
- public void endElement(String uri, String localName, String name)
- throws SAXException {
- nodeName = null;
- if (localName.equals("group")) {
-
- groupEntities.add(groupEntity);
- } else if (localName.equals("member")) {
-
- groupEntity.getMemberEntities().add(memberEntity);
- } else if (localName.equals("groupID")) {
- endCDATA();
- groupEntity.setGroupId(getCDataString());
- } else if (localName.equals("groupName")) {
- endCDATA();
- groupEntity.setGroupName(getCDataString());
- } else if (localName.equals("name")) {
- endCDATA();
- memberEntity.setName(getCDataString());
- } else if (localName.equals("age")) {
- endCDATA();
- memberEntity.setAge(getCDataString());
- }
- }
-
- private String getCDataString() {
- return cData.toString();
- }
-
-
- @Override
- public void startCDATA() throws SAXException {
- if (cData == null) {
- cData = new StringBuffer();
- } else {
- cData.delete(0, cData.length());
- }
- super.startCDATA();
- }
-
- @Override
- public void endCDATA() throws SAXException {
-
- super.endCDATA();
- }
-
- public ArrayList<GroupEntity> getResult() {
- return groupEntities;
- }
-
- }
package com.steven.android.sax.xml.handler;
import java.util.ArrayList;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.ext.DefaultHandler2;
import com.steven.android.sax.xml.entity.GroupEntity;
import com.steven.android.sax.xml.entity.MemberEntity;
/**
* 描述:data.xml文件内容解析handler</br>
*
* @author stevenhu223
*/
public class DataParseHandler extends DefaultHandler2 {
InputSource mInputSource;
String nodeName;
public GroupEntity groupEntity;
public MemberEntity memberEntity;
public ArrayList<GroupEntity> groupEntities;
StringBuffer cData;// 某一段cdata的值
public DataParseHandler() {
cData = new StringBuffer();
groupEntities = new ArrayList<GroupEntity>();
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (nodeName != null && nodeName.equals("groupID")) {
String data = new String(ch, start, length);
cData.append(data);
super.characters(ch, start, length);
} else if (nodeName != null && nodeName.equals("groupName")) {
String data = new String(ch, start, length);
cData.append(data);
super.characters(ch, start, length);
} else if (nodeName != null && nodeName.equals("name")) {
String data = new String(ch, start, length);
cData.append(data);
super.characters(ch, start, length);
} else if (nodeName != null && nodeName.equals("age")) {
String data = new String(ch, start, length);
cData.append(data);
super.characters(ch, start, length);
}
}
@Override
public void startElement(String uri, String localName, String name,
Attributes atts) throws SAXException {
nodeName = localName;
if (localName.equals("group")) {
//读到group开始元素时创建GroupEntity对象
groupEntity = new GroupEntity();
} else if (localName.equals("member")){
//读到member开始元素时创建MemberEntity对象
memberEntity = new MemberEntity();
} else if (localName.equals("groupID")) {
startCDATA();
} else if (localName.equals("groupName")) {
startCDATA();
} else if (localName.equals("name")) {
startCDATA();
} else if (localName.equals("age")) {
startCDATA();
}
}
@Override
public void endElement(String uri, String localName, String name)
throws SAXException {
nodeName = null;
if (localName.equals("group")) {
//读到group结束元素时添加GroupEntity对象添加到集合
groupEntities.add(groupEntity);
} else if (localName.equals("member")) {
//读到member结束元素时将MemberEntity对象添加到集合
groupEntity.getMemberEntities().add(memberEntity);
} else if (localName.equals("groupID")) {
endCDATA();
groupEntity.setGroupId(getCDataString());
} else if (localName.equals("groupName")) {
endCDATA();
groupEntity.setGroupName(getCDataString());
} else if (localName.equals("name")) {
endCDATA();
memberEntity.setName(getCDataString());
} else if (localName.equals("age")) {
endCDATA();
memberEntity.setAge(getCDataString());
}
}
private String getCDataString() {
return cData.toString();
}
// 重新开始CDATA
@Override
public void startCDATA() throws SAXException {
if (cData == null) {
cData = new StringBuffer();
} else {
cData.delete(0, cData.length());
}
super.startCDATA();
}
@Override
public void endCDATA() throws SAXException {
super.endCDATA();
}
public ArrayList<GroupEntity> getResult() {
return groupEntities;
}
}
通过
DataParseHandler的getResult()方法可以获取到解析xml数据成功后的实体集合。在创xml解析数据对应的DataParseHandler类后,还需要将该类的对象和需要解析的xml数据关联起来,于是就有了XmlParserUtil工具类。
5.XmlParserUtil.java文件代码如下:
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- package com.steven.android.sax.xml.util;
-
- import java.io.StringReader;
-
- import javax.xml.parsers.SAXParserFactory;
- import org.xml.sax.InputSource;
- import org.xml.sax.XMLReader;
- import org.xml.sax.ext.DefaultHandler2;
-
-
-
-
-
- public class XmlParserUtil {
-
-
-
-
-
-
- public static void parserXMLByHandler(DefaultHandler2 handler,String xml) {
- XMLReader xmlReader;
- InputSource input = getInputSouceByString(xml);
- try {
- SAXParserFactory s = SAXParserFactory.newInstance();
- xmlReader = s.newSAXParser().getXMLReader();
- xmlReader.setContentHandler(handler);
- xmlReader.parse(input);
-
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- }
-
-
-
-
-
-
- public static InputSource getInputSouceByString(String xmlStr) {
- StringReader sr = new StringReader(xmlStr);
- InputSource is = new InputSource(sr);
- return is;
-
- }
-
- }
package com.steven.android.sax.xml.util;
import java.io.StringReader;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.DefaultHandler2;
/**
* 描述:Sax解析工具类
* @author stevenhu223
*
*/
public class XmlParserUtil {
/**
* 关联DefaultHandler2和xml数据进行解析
* @param handler
* @param xml
*/
public static void parserXMLByHandler(DefaultHandler2 handler,String xml) {
XMLReader xmlReader;
InputSource input = getInputSouceByString(xml);
try {
SAXParserFactory s = SAXParserFactory.newInstance();
xmlReader = s.newSAXParser().getXMLReader();
xmlReader.setContentHandler(handler);
xmlReader.parse(input);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 通过字符串获取流
* @param xmlStr
* @return
*/
public static InputSource getInputSouceByString(String xmlStr) {
StringReader sr = new StringReader(xmlStr);
InputSource is = new InputSource(sr);
return is;
}
}
所以,通过创建对应的DataParseHandler与XmlParserUtil关联起来就可以完成解析xml数据了。
小结:关于SAX解析xml数据。比较麻烦的是,每份需要解析的xml数据对应的都需要创建相应的DefaultHandler2类,如果App后台接口较多的话,需要创建的解析后台数据的DefaultHandler2类也就相应的增多,这样会给App的维护带来一定的弊端。这种情况下建议还是使用simple-xml解析,毕竟simple-xml包也不大,也就418KB而已。笔者就经常使用simple-xml包解析xml数据。
三。jackson包解析json格式数据
上面讲解的是xml数据解析,接下来将谈谈json数据的解析,json数据的解析有很多种方式。当然,我个人比较喜欢的是jackson包对Json数据的解析,jackson包相对来说比较大一点,有1MB以上,不过速度快,效率高,性能72个赞。这个就是笔者比较青睐它的原因。当然了,有时候考虑到工程的大小,也不得不考虑其他方式的解析,google也提供了一些json解析的工具包,这里也不再一一介绍,有兴趣可以去google官网去了解了解。这里主要还是介绍jackson的解析,不喜欢的可以绕道绕道咯。jackson的官网地址为:http://jackson.codehaus.org/,相关的jar包可以到官网上下载。
下面是整个Demo工程文件截图,如下图:
同样的,该工程也是在simple-xml工程的基础上去做处理,也是将解析后的数据通过ExpandableListView显示出来。相同的类,这里就不在贴出来了。不过相关的实体类会有变化。assets目录中的jsonData文件内容为json格式。内容和simple-xml工程中的data.xml文件内容一样,只不过是json格式,我们来看看jsonData文件内容。
1.jsonData文件内容如下(注意:将jsonData文件的编码格式设置为UTF-8,否则文件将出现乱编吗):
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- {
- "dataContent": {
- "group": [
- {
- "groupID": "1",
- "groupName": "第一组",
- "member": [
- {
- "name": "张三",
- "age": "22"
- },
- {
- "name": "李四",
- "age": "24"
- },
- {
- "name": "欧阳雪",
- "age": "18"
- }
- ]
- },
- {
- "groupID": "2",
- "groupName": "第二组",
- "member": [
- {
- "name": "司徒静",
- "age": "19"
- },
- {
- "name": "叶笙",
- "age": "26"
- },
- {
- "name": "杨风",
- "age": "25"
- }
- ]
- },
- {
- "groupID": "3",
- "groupName": "第三组",
- "member": [
- {
- "name": "王龙",
- "age": "32"
- },
- {
- "name": "西门胜男",
- "age": "21"
- },
- {
- "name": "张铬",
- "age": "45"
- }
- ]
- }
- ]
- }
- }
{
"dataContent": {
"group": [
{
"groupID": "1",
"groupName": "第一组",
"member": [
{
"name": "张三",
"age": "22"
},
{
"name": "李四",
"age": "24"
},
{
"name": "欧阳雪",
"age": "18"
}
]
},
{
"groupID": "2",
"groupName": "第二组",
"member": [
{
"name": "司徒静",
"age": "19"
},
{
"name": "叶笙",
"age": "26"
},
{
"name": "杨风",
"age": "25"
}
]
},
{
"groupID": "3",
"groupName": "第三组",
"member": [
{
"name": "王龙",
"age": "32"
},
{
"name": "西门胜男",
"age": "21"
},
{
"name": "张铬",
"age": "45"
}
]
}
]
}
}
接下来,我们看看主页面的代码。
2.MainActivity.java文件代码如下:
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- package com.steven.android.jackson.activity;
-
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import org.codehaus.jackson.map.ObjectMapper;
- import org.codehaus.jackson.type.TypeReference;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.Menu;
- import android.widget.ExpandableListView;
- import com.steven.android.jackson.adapter.ExpandAdapter;
- import com.steven.android.jackson.entity.JsonResponseEntity;
-
-
-
-
-
- public class MainActivity extends Activity {
-
- private ExpandableListView mExpandableListView;
- private ExpandAdapter mAdapter;
- private ObjectMapper mObjectMapper;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- mExpandableListView = (ExpandableListView) findViewById(R.id.expanlist_content);
- mObjectMapper = new ObjectMapper();
- try {
- parseJsonData();
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- }
-
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
-
- getMenuInflater().inflate(R.menu.main, menu);
- return true;
- }
-
-
-
-
-
- private void parseJsonData() throws Exception{
- InputStream inputStream = getResources().getAssets().open("jsonData");
- String dataContent = convertStreamToString(inputStream);
- try {
- JsonResponseEntity datEntity = mObjectMapper.readValue(dataContent,
- new TypeReference<JsonResponseEntity>() {
- });
- mAdapter = new ExpandAdapter(this, datEntity.getDataContent().getGroup());
- mExpandableListView.setAdapter(mAdapter);
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- }
-
-
-
-
-
-
- public String convertStreamToString(InputStream is) {
-
- BufferedReader reader = new BufferedReader(new InputStreamReader(is));
- StringBuilder sb = new StringBuilder();
- String line = null;
- try {
- while ((line = reader.readLine()) != null) {
- sb.append(line);
- }
- } catch (IOException e) {
- e.printStackTrace();
- } finally {
- try {
- is.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- return sb.toString();
-
- }
-
- }
package com.steven.android.jackson.activity;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.TypeReference;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ExpandableListView;
import com.steven.android.jackson.adapter.ExpandAdapter;
import com.steven.android.jackson.entity.JsonResponseEntity;
/**
* 描述:主页面
* @author stevenhu223
*
*/
public class MainActivity extends Activity {
private ExpandableListView mExpandableListView;
private ExpandAdapter mAdapter;
private ObjectMapper mObjectMapper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mExpandableListView = (ExpandableListView) findViewById(R.id.expanlist_content);
mObjectMapper = new ObjectMapper();
try {
parseJsonData();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/**
* json数据格式解析
* @throws Exception
*/
private void parseJsonData() throws Exception{
InputStream inputStream = getResources().getAssets().open("jsonData");
String dataContent = convertStreamToString(inputStream);
try {
JsonResponseEntity datEntity = mObjectMapper.readValue(dataContent,
new TypeReference<JsonResponseEntity>() {
});
mAdapter = new ExpandAdapter(this, datEntity.getDataContent().getGroup());
mExpandableListView.setAdapter(mAdapter);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
/**
* 输入流转字符串
* @param is
* @return
*/
public String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
代码中,parseJsonData方法实现jackson解析json格式数据,ObjectMapper来自jackson包,通过调用mObjectMapper对象readValue函数就可以实现对json数据的解析。我们来看看JsonResponseEntity实体类的代码。
3.JsonResponseEntity.java文件代码如下:
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- package com.steven.android.jackson.entity;
-
- public class JsonResponseEntity {
-
-
-
-
- private DataContentEntity dataContent;
-
- public DataContentEntity getDataContent() {
- return dataContent;
- }
-
- public void setDataContent(DataContentEntity dataContent) {
- this.dataContent = dataContent;
- }
-
- }
package com.steven.android.jackson.entity;
public class JsonResponseEntity {
/**
* jackson解析有严格的规定,变量名要和对应的元素名一致,否则解析会时会报错
*/
private DataContentEntity dataContent;
public DataContentEntity getDataContent() {
return dataContent;
}
public void setDataContent(DataContentEntity dataContent) {
this.dataContent = dataContent;
}
}
值得注意的是,jackson解析有严格的实体类变量名对应json数据中的key名相同的限制,如果不一致,解析将会有问题。变量名dataContent对应的就是jsonData文件内容中的第一个key(dataContent);接下来来列出的其他实体类中的变量名,集合名都要和jsonData文件内容中的一致。
4.DataContentEntity.java文件代码如下:
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- package com.steven.android.jackson.entity;
-
- import java.util.List;
-
- public class DataContentEntity {
-
-
- private List<GroupEntity> group;
-
- public List<GroupEntity> getGroup() {
- return group;
- }
-
- public void setGroup(List<GroupEntity> group) {
- this.group = group;
- }
- }
package com.steven.android.jackson.entity;
import java.util.List;
public class DataContentEntity {
//变量名对应json内容中的group
private List<GroupEntity> group;
public List<GroupEntity> getGroup() {
return group;
}
public void setGroup(List<GroupEntity> group) {
this.group = group;
}
}
5.GroupEntity文件代码如下:
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- package com.steven.android.jackson.entity;
-
- import java.util.ArrayList;
- import java.util.List;
-
- public class GroupEntity {
-
- private String groupID;
- private String groupName;
-
- private List<MemberEntity> member = new ArrayList<MemberEntity>();
-
- public String getGroupID() {
- return groupID;
- }
-
- public void setGroupID(String groupID) {
- this.groupID = groupID;
- }
-
- public String getGroupName() {
- return groupName;
- }
-
- public void setGroupName(String groupName) {
- this.groupName = groupName;
- }
-
- public List<MemberEntity> getMember() {
- return member;
- }
-
- public void setMember(List<MemberEntity> member) {
- this.member = member;
- }
-
- }
package com.steven.android.jackson.entity;
import java.util.ArrayList;
import java.util.List;
public class GroupEntity {
private String groupID; //变量名对应json内容中的groupID
private String groupName; //变量名对应json内容中的groupName
//变量名对应json内容中的member
private List<MemberEntity> member = new ArrayList<MemberEntity>();
public String getGroupID() {
return groupID;
}
public void setGroupID(String groupID) {
this.groupID = groupID;
}
public String getGroupName() {
return groupName;
}
public void setGroupName(String groupName) {
this.groupName = groupName;
}
public List<MemberEntity> getMember() {
return member;
}
public void setMember(List<MemberEntity> member) {
this.member = member;
}
}
6.MemberEntity.java文件代码如下:
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- package com.steven.android.jackson.entity;
-
- public class MemberEntity {
-
- private String name;
- private String age;
-
- public String getName() {
- return name;
- }
-
- public void setName(String name) {
- this.name = name;
- }
-
- public String getAge() {
- return age;
- }
-
- public void setAge(String age) {
- this.age = age;
- }
-
- }
package com.steven.android.jackson.entity;
public class MemberEntity {
private String name; //变量名对应json内容中的name
private String age; //变量名对应json内容中的age
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
以上为jackson解析相关的实体类。通过MainActivity的parseJson方法就可以将json数据解析成封装的DataJsonResponseEntity了。
四。jackson数据转换解析
jackson包不仅仅是单纯的解析json格式数据,还可以双向解析,甚至可以将json数据解析成map映射等。接下来将主要介绍Jackson包的json与bean(实体类)、Map与json之间的双向解析。
下面是整个Demo工程文件截图,如下图:
工程中,assets目录中的jsonData文件内容为一些相关销售报表数据。
1.jsonData文件内容如下(注意:将jsonData文件的编码格式设置为UTF-8,否则文件将出现乱编吗):
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- {
- "retCode": "0",
- "retMsg": "success",
- "chart": {
- "caption": "2014季度销售报表汇总",
- "subcaption": "2014季度",
- "xaxisname": "销售月份",
- "yaxisname": "销售额度",
- "numberprefix": "$"
- },
- "data": [
- {
- "label": "一月",
- "value": "17400"
- },
- {
- "label": "二月",
- "value": "19800"
- },
- {
- "label": "三月",
- "value": "21800"
- },
- {
- "label": "四月",
- "value": "23800"
- },
- {
- "label": "五月",
- "value": "29600"
- },
- {
- "label": "六月",
- "value": "27600"
- },
- {
- "label": "七月",
- "value": "31800"
- },
- {
- "label": "八月",
- "value": "39700"
- },
- {
- "label": "九月",
- "value": "37800"
- },
- {
- "label": "十月",
- "value": "21900"
- },
- {
- "label": "十一月",
- "value": "32900"
- },
- {
- "label": "十二月",
- "value": "39800"
- }
- ]
- }
{
"retCode": "0",
"retMsg": "success",
"chart": {
"caption": "2014季度销售报表汇总",
"subcaption": "2014季度",
"xaxisname": "销售月份",
"yaxisname": "销售额度",
"numberprefix": "$"
},
"data": [
{
"label": "一月",
"value": "17400"
},
{
"label": "二月",
"value": "19800"
},
{
"label": "三月",
"value": "21800"
},
{
"label": "四月",
"value": "23800"
},
{
"label": "五月",
"value": "29600"
},
{
"label": "六月",
"value": "27600"
},
{
"label": "七月",
"value": "31800"
},
{
"label": "八月",
"value": "39700"
},
{
"label": "九月",
"value": "37800"
},
{
"label": "十月",
"value": "21900"
},
{
"label": "十一月",
"value": "32900"
},
{
"label": "十二月",
"value": "39800"
}
]
}
2.MainActivity.java文件代码如下:
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- package com.stevenhu.android.jacksontest;
-
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.io.StringWriter;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
- import org.codehaus.jackson.JsonGenerator;
- import org.codehaus.jackson.map.ObjectMapper;
- import org.codehaus.jackson.type.TypeReference;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.Menu;
- import android.view.MenuItem;
- import android.widget.TextView;
- import com.stevenhu.android.jacksontest.bean.ChartsDataEntity;
- import com.stevenhu.android.jacksontest.bean.ChartsEntity;
- import com.stevenhu.android.jacksontest.bean.DataSetEntity;
-
- public class MainActivity extends Activity{
-
- private String jsonData;
- private String mResult;
- private TextView text_content_show;
- private ChartsDataEntity mChartsDataEntity;
- private ObjectMapper mObjectMapper;
- private List<DataSetEntity> mDataSets;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- try {
- initialize();
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- initBean();
- text_content_show.setText(parseMapToJson());
- }
-
-
-
-
- private void initialize() throws Exception{
-
- text_content_show = (TextView)findViewById(R.id.text_content_show);
- InputStream inputStream = getResources().getAssets().open("jsonData");
- jsonData = convertStreamToString(inputStream);
-
- }
-
-
-
-
-
-
- public String convertStreamToString(InputStream is) {
-
- BufferedReader reader = new BufferedReader(new InputStreamReader(is));
- StringBuilder sb = new StringBuilder();
- String line = null;
- try {
- while ((line = reader.readLine()) != null) {
- sb.append(line);
- }
- } catch (IOException e) {
- e.printStackTrace();
- } finally {
- try {
- is.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- return sb.toString();
-
- }
-
-
-
-
- private void initBean() {
- mObjectMapper = new ObjectMapper();
- mChartsDataEntity = new ChartsDataEntity();
- mDataSets = new ArrayList<DataSetEntity>();
-
- ChartsEntity chart = new ChartsEntity();
- chart.setCaption("2014季度销售报表汇总");
- chart.setSubcaption("2014季度");
- chart.setXaxisname("销售月份");
- chart.setYaxisname("销售额度");
- chart.setNumberprefix("$");
-
- mChartsDataEntity.setChart(chart);
-
- initDataSet("一月", "17400");
- initDataSet("二月", "19800");
- initDataSet("三月", "21800");
- initDataSet("四月", "23800");
- initDataSet("五月", "29600");
- initDataSet("六月", "27600");
- initDataSet("七月", "31800");
- initDataSet("八月", "39700");
- initDataSet("九月", "37800");
- initDataSet("十月", "21900");
- initDataSet("十一月", "32900");
- initDataSet("十二月", "39800");
- initDataSet("一月", "17400");
-
- }
-
-
-
-
-
-
- private void initDataSet(String month, String sale) {
-
- DataSetEntity dataSet = new DataSetEntity();
- dataSet.setLabel(month);
- dataSet.setValue(sale);
- mDataSets.add(dataSet);
- mChartsDataEntity.setData(mDataSets);
- }
-
-
-
-
-
- private String parseJsonToMap() {
- String jsonString = "{\"name\":\"2014季度销售报表汇总\",\"chart\":{\"caption\":\"2014季度销售报表汇总\"," +
- " \"subcaption\":\"2014季度\",\"xaxisname\":\"销售月份\", \"yaxisname\":\"销售额度\", \"numberprefix\":\"$\"}}";
- if (null != mResult) {
- mResult = "";
- }
-
- try {
- Map<String , Map<String , Object>> maps = mObjectMapper.readValue(jsonString, Map.class);
- Set<String> keys = maps.keySet();
- Iterator<String> iterator = keys.iterator();
- while (iterator.hasNext()) {
- String key = iterator.next();
- mResult += key + ":" + maps.get(key) + "\n";
- }
-
- return mResult;
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
-
-
-
-
-
- private String parseMapToJson() {
- Map<String , Object> map = new HashMap<String , Object>();
- String chartTitle = mChartsDataEntity.getChart().getCaption();
- map.put("name", chartTitle);
- map.put("chart", mChartsDataEntity.getChart());
- try {
- StringWriter sw = new StringWriter();
- JsonGenerator jsonGenerator = mObjectMapper.getJsonFactory().createJsonGenerator(sw);
- jsonGenerator.writeObject(map);
- jsonGenerator.close();
- String json = sw.toString();
- return json;
- } catch (Exception e) {
-
- }
- return null;
- }
-
-
-
-
-
- private String parseJsonToBean() {
-
- try {
- ChartsDataEntity chartsData = mObjectMapper.readValue(jsonData,
- new TypeReference<ChartsDataEntity>() {
- });
- ChartsEntity charts = chartsData.getChart();
-
- mResult = "RetCode-->" + chartsData.getRetCode() + "\n" +
- "RetMsg-->" + chartsData.getRetMsg() + "\n" +
- "caption-->" + charts.getCaption() + "\n" +
- "subcaption-->" + charts.getSubcaption() + "\n" +
- "xaxisname-->" + charts.getXaxisname() + "\n" +
- "yaxisname-->" + charts.getYaxisname() + "\n" +
- "numberprefix-->" + charts.getNumberprefix();
- } catch (Exception e) {
-
- e.printStackTrace();
- }
-
- List<DataSetEntity> datas = mChartsDataEntity.getData();
-
- for (DataSetEntity dataSet : datas) {
- mResult += "\n" + "label-->" + dataSet.getLabel() + " " +
- "value-->" + dataSet.getValue();
- }
-
- return mResult;
- }
-
-
-
-
-
- private String parseBeanToJson() {
-
- try {
- StringWriter sw = new StringWriter();
- JsonGenerator jsonGenerator = mObjectMapper.getJsonFactory().createJsonGenerator(sw);
-
- jsonGenerator.writeObject(mChartsDataEntity);
- jsonGenerator.close();
- String json = sw.toString();
- return json;
- } catch (Exception e) {
-
- e.printStackTrace();
- }
- return null;
- }
-
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
-
- getMenuInflater().inflate(R.menu.main, menu);
- return true;
- }
-
- @Override
- public boolean onOptionsItemSelected(MenuItem item) {
- switch (item.getItemId()) {
- case R.id.item_map_to_json:
- text_content_show.setText(parseMapToJson());
- break;
-
- case R.id.item_json_to_map:
- text_content_show.setText(parseJsonToMap());
- break;
-
- case R.id.item_bean_to_json:
- text_content_show.setText(parseBeanToJson());
- break;
-
- case R.id.item_json_to_bean:
- text_content_show.setText(parseJsonToBean());
- break;
- }
- return true;
- }
-
- }
package com.stevenhu.android.jacksontest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.TypeReference;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import com.stevenhu.android.jacksontest.bean.ChartsDataEntity;
import com.stevenhu.android.jacksontest.bean.ChartsEntity;
import com.stevenhu.android.jacksontest.bean.DataSetEntity;
public class MainActivity extends Activity{
private String jsonData;
private String mResult;
private TextView text_content_show;
private ChartsDataEntity mChartsDataEntity;
private ObjectMapper mObjectMapper;
private List<DataSetEntity> mDataSets;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
initialize();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
initBean();
text_content_show.setText(parseMapToJson());
}
/**
* 初始化
*/
private void initialize() throws Exception{
text_content_show = (TextView)findViewById(R.id.text_content_show);
InputStream inputStream = getResources().getAssets().open("jsonData");
jsonData = convertStreamToString(inputStream);
}
/**
* 输入流转字符串
* @param is
* @return
*/
public String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
/**
* 初始化Bean
*/
private void initBean() {
mObjectMapper = new ObjectMapper();
mChartsDataEntity = new ChartsDataEntity();
mDataSets = new ArrayList<DataSetEntity>();
//ChartsEntity对象定义了图表属性
ChartsEntity chart = new ChartsEntity();
chart.setCaption("2014季度销售报表汇总");
chart.setSubcaption("2014季度");
chart.setXaxisname("销售月份");
chart.setYaxisname("销售额度");
chart.setNumberprefix("$");
mChartsDataEntity.setChart(chart);
initDataSet("一月", "17400");
initDataSet("二月", "19800");
initDataSet("三月", "21800");
initDataSet("四月", "23800");
initDataSet("五月", "29600");
initDataSet("六月", "27600");
initDataSet("七月", "31800");
initDataSet("八月", "39700");
initDataSet("九月", "37800");
initDataSet("十月", "21900");
initDataSet("十一月", "32900");
initDataSet("十二月", "39800");
initDataSet("一月", "17400");
}
/**
* 初始化DataSet
* @param month
* @param sale
*/
private void initDataSet(String month, String sale) {
//DataSetEntity对象定义了图表的一组数据
DataSetEntity dataSet = new DataSetEntity();
dataSet.setLabel(month);
dataSet.setValue(sale);
mDataSets.add(dataSet);
mChartsDataEntity.setData(mDataSets);
}
/**
* json数据格式转map
* @return
*/
private String parseJsonToMap() {
String jsonString = "{\"name\":\"2014季度销售报表汇总\",\"chart\":{\"caption\":\"2014季度销售报表汇总\"," +
" \"subcaption\":\"2014季度\",\"xaxisname\":\"销售月份\", \"yaxisname\":\"销售额度\", \"numberprefix\":\"$\"}}";
if (null != mResult) {
mResult = "";
}
try {
Map<String , Map<String , Object>> maps = mObjectMapper.readValue(jsonString, Map.class);
Set<String> keys = maps.keySet();
Iterator<String> iterator = keys.iterator();
while (iterator.hasNext()) {
String key = iterator.next();
mResult += key + ":" + maps.get(key) + "\n";
}
return mResult;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* map转json格式数据
* @return
*/
private String parseMapToJson() {
Map<String , Object> map = new HashMap<String , Object>();
String chartTitle = mChartsDataEntity.getChart().getCaption();
map.put("name", chartTitle);
map.put("chart", mChartsDataEntity.getChart());
try {
StringWriter sw = new StringWriter();
JsonGenerator jsonGenerator = mObjectMapper.getJsonFactory().createJsonGenerator(sw);
jsonGenerator.writeObject(map);
jsonGenerator.close();
String json = sw.toString();
return json;
} catch (Exception e) {
// TODO: handle exception
}
return null;
}
/**
* json数据格式转实体类
* @return
*/
private String parseJsonToBean() {
try {
ChartsDataEntity chartsData = mObjectMapper.readValue(jsonData,
new TypeReference<ChartsDataEntity>() {
});
ChartsEntity charts = chartsData.getChart();
//String name = chartsData.getName();
mResult = "RetCode-->" + chartsData.getRetCode() + "\n" +
"RetMsg-->" + chartsData.getRetMsg() + "\n" +
"caption-->" + charts.getCaption() + "\n" +
"subcaption-->" + charts.getSubcaption() + "\n" +
"xaxisname-->" + charts.getXaxisname() + "\n" +
"yaxisname-->" + charts.getYaxisname() + "\n" +
"numberprefix-->" + charts.getNumberprefix();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
List<DataSetEntity> datas = mChartsDataEntity.getData();
for (DataSetEntity dataSet : datas) {
mResult += "\n" + "label-->" + dataSet.getLabel() + " " +
"value-->" + dataSet.getValue();
}
return mResult;
}
/**
* 实体类转json格式数据
* @return
*/
private String parseBeanToJson() {
try {
StringWriter sw = new StringWriter();
JsonGenerator jsonGenerator = mObjectMapper.getJsonFactory().createJsonGenerator(sw);
//objectMapper.writeValue(jsonGenerator, mChartsDataEntity);
jsonGenerator.writeObject(mChartsDataEntity);
jsonGenerator.close();
String json = sw.toString();
return json;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.item_map_to_json:
text_content_show.setText(parseMapToJson());
break;
case R.id.item_json_to_map:
text_content_show.setText(parseJsonToMap());
break;
case R.id.item_bean_to_json:
text_content_show.setText(parseBeanToJson());
break;
case R.id.item_json_to_bean:
text_content_show.setText(parseJsonToBean());
break;
}
return true;
}
}
在MainActvity中,通过parseMapToJson、parseJsonToMap、parseBeanToJson、parseJsonToBean等方法实现json与bean、map与json之间的解析转换。其他相关的解析实体类的代码就不贴出来了,原理都是一样的。