Android中处理Json的网络获取实例

Person类

 package com.jsonMysql.person;

 public class Person {
     private String name;
     private String address;
     private Integer age;

     public Person() {
         super();
     }

     public Person(String name, String address, Integer age) {
         super();
         this.name = name;
         this.address = address;
         this.age = age;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public String getAddress() {
         return address;
     }

     public void setAddress(String address) {
         this.address = address;
     }

     public Integer getAge() {
         return age;
     }

     public void setAge(Integer age) {
         this.age = age;
     }

     @Override
     public String toString() {
         return "Person [name=" + name + ", address=" + address + ", age=" + age
                 + "]";
     }



 }

MainActivity类

 package com.jsonMysql.main;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;

 import com.jiangqq.csdn.R;
 import com.jsonMysql.person.Person;
 import com.jsonMysql.util.JsonParse;

 import android.app.Activity;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;
 import android.widget.Toast;

 public class MainActivity extends Activity {
     private Button mButton;
     private ListView mListView;
     //使用IP不能使用localhost或者127.0.0.1，因为android模拟器默认绑定这个IP，这里应该访问局域网IP
     private static final String urlPath = "http://192.168.1.101:8080/JsonWeb/JsonServlet";
     private static final String TAG = "MainActivity";
     private List<Person> persons;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         mButton = (Button) findViewById(R.id.button1);
         mListView = (ListView) findViewById(R.id.listView1);
         mButton.setOnClickListener(new MyOnClickListener());
     }

     private class MyOnClickListener implements OnClickListener {
         @Override
         public void onClick(View v) {
             try {
                 // 得到Json解析成功之后数据
                 persons = JsonParse.getListPerson(urlPath);
                 List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
                 for (int i = 0; i < persons.size(); i++) {
                     HashMap<String, Object> map = new HashMap<String, Object>();
                     map.put("name", persons.get(i).getName());
                     map.put("address", persons.get(i).getAddress());
                     map.put("age", persons.get(i).getAge());
                     data.add(map);
                 }
                 SimpleAdapter _Adapter = new SimpleAdapter(MainActivity.this,
                         data, R.layout.listview_item, new String[] { "name",
                                 "address", "age" }, new int[] { R.id.textView1,
                                 R.id.textView2, R.id.textView3 });
                 mListView.setAdapter(_Adapter);
             } catch (Exception e) {
                 Toast.makeText(MainActivity.this, "解析失败", 2000);
                 Log.i(TAG, e.toString());

             }
         }
     }
 }

Json解析类

 package com.jsonMysql.util;

 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.List;

 import org.json.JSONArray;
 import org.json.JSONObject;

 import com.jsonMysql.person.Person;

 public class JsonParse {
     /**
      * 解析Json数据
      *
      * @param urlPath
      * @return mlists
      * @throws Exception
      */

     public static List<Person> getListPerson(String urlPath) throws Exception {
         List<Person> mlists = new ArrayList<Person>();
         byte[] data = readParse(urlPath);
         JSONArray array = new JSONArray(new String(data));
         for (int i = 0; i < array.length(); i++) {
             JSONObject item = array.getJSONObject(i);
             String name = item.getString("name");
             String address = item.getString("address");
             int age = item.getInt("age");
             mlists.add(new Person(name, address, age));
         }
         return mlists;
     }

     /**
      * 从指定的url中获取字节数组
      *
      * @param urlPath
      * @return 字节数组
      * @throws Exception
      */
     public static byte[] readParse(String urlPath) throws Exception {
         ByteArrayOutputStream outStream = new ByteArrayOutputStream();
         byte[] data = new byte[1024];
         int len = 0;
         URL url = new URL(urlPath);
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         InputStream inStream = conn.getInputStream();

         while ((len = inStream.read(data)) != -1) {
             outStream.write(data, 0, len);

         }
         inStream.close();
         return outStream.toByteArray();

     }
 }

Mainifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.jiangqq.csdn"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="8" />

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
             android:name="com.jsonMysql.main.MainActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>

     <uses-permission android:name="android.permission.INTERNET" />

 </manifest>

list.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal" >

     <TextView
         android:id="@+id/textView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:paddingLeft="15dip"
         android:text="TextView" />

     <TextView
         android:id="@+id/textView3"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:paddingLeft="15dip"
         android:text="TextView" />

     <TextView
         android:id="@+id/textView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:paddingLeft="15dip"
         android:text="TextView" />

 </LinearLayout>

main.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical" >
     <TextView
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="@string/jsonname" />
     <Button
         android:id="@+id/button1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="获取数据并且解析" />
     <ListView
         android:id="@+id/listView1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" >
     </ListView>
 </LinearLayout>