Android中的xml、json格式数据解析
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：
1
第一组
张三
22
李四
24
欧阳雪
18
2
第二组
司徒静
19
叶笙
26
杨风
25
3
第三组
王龙
32
西门胜男
21
张铬
45
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]*([\\s\\S]* )[\\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 parseToBean(Class 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();
}
} 3.DataParseResponse.java文件代码如下：
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 mGroupEntities;
} 4.GroupEntity.java文件代码如下：
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 memberEntities;
} 5.MemberEntity.java文件代码如下：
@Root(name="member")
public class MemberEntity {
@Element(required=false) public String name;
@Element(required=false) public String age;
}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：
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 mGroupEntities;
private LayoutInflater mInflater;
public ExpandAdapter(Context context, List 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;
}
} 7.ViewHolder.java文件代码如下：
package com.steven.android.sax.xml.custom;
import android.util.SparseArray;
import android.view.View;
public class ViewHolder {
@SuppressWarnings("unchecked")
public static T get(View view, int id) {
SparseArray viewHolder = (SparseArray) view.getTag();
if (viewHolder == null) {
viewHolder = new SparseArray();
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：
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 memberEntities = new ArrayList();;
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 getMemberEntities() {
return memberEntities;
}
public void setMemberEntities(List memberEntities) {
this.memberEntities = memberEntities;
}
}
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;
}
}3.MainActivity.java文件代码如下：
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]*([\\s\\S]* )[\\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 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();
}
} 4.DataParseHandler.java文件代码如下：
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
*
* @author stevenhu223
*/
public class DataParseHandler extends DefaultHandler2 {
InputSource mInputSource;
String nodeName;
public GroupEntity groupEntity;
public MemberEntity memberEntity;
public ArrayList groupEntities;
StringBuffer cData;// 某一段cdata的值
public DataParseHandler() {
cData = new StringBuffer();
groupEntities = new ArrayList();
}
@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 getResult() {
return groupEntities;
}
} 5.XmlParserUtil.java文件代码如下：
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)：
{
"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：
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() {
});
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();
}
} 3.JsonResponseEntity.java文件代码如下：
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;
}
}4.DataContentEntity.java文件代码如下：
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 group;
public List getGroup() {
return group;
}
public void setGroup(List group) {
this.group = group;
}
}
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 member = new ArrayList();
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 getMember() {
return member;
}
public void setMember(List member) {
this.member = member;
}
} 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;
}
} 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)：
{
"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"
}
]
}
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 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();
//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> maps = mObjectMapper.readValue(jsonString, Map.class);
Set keys = maps.keySet();
Iterator 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 map = new HashMap();
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() {
});
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 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;
}
}