Android-Json简单解析与生成实例（一）

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Json简单解析与生成实例
package com.example.yulongji.android4;import android.app.Activity;import android.os.Bundle;import android.view.View;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;public class MainActivity extends Activity {    private Person person;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    /*    * 方式一    *    *    * */    public void onclick1(View view) {        parseJson();        parseJsons();    }    /*            单条数据生成与解析            {"person":{"id":1,"address":"北京","age":23,"name":"张三"}}             */    private void parseJson() {        try {            JSONObject jsonObject = new JSONObject();            jsonObject.put("id", 1);            jsonObject.put("name", "张三");            jsonObject.put("address", "北京");            JSONObject jsonObject1 = new JSONObject();            jsonObject1.put("person", jsonObject);            System.out.println(jsonObject1);            //{"person":{"id":1,"address":"北京","age":23,"name":"张三"}}            person = new Person();            JSONObject jObject = new JSONObject(jsonObject1.toString()).getJSONObject("person");            person.setId(Integer.parseInt(jObject.getString("id")));            person.setName(jObject.getString("name"));            person.setAddress(jObject.getString("address"));            System.out.println(person);        } catch (JSONException e) {            e.printStackTrace();        }    }    /*    多条数据    {"persons":{"person3":"Person{address='南昌', id=3, name='王五'}",                "person1":"Person{address='北京', id=1, name='张三'}",                "person2":"Person{address='上海', id=2, name='李四'}"               }     }     */    public void parseJsons() {        try {            JSONObject jsonObject = new JSONObject();            JSONObject jsOb = new JSONObject();            Person person1 = new Person(1, "张三", "北京");            Person person2 = new Person(2, "李四", "上海");            Person person3 = new Person(3, "王五", "南昌");            jsonObject.put("person1", person1);            jsonObject.put("person2", person2);            jsonObject.put("person3", person3);            jsOb.put("persons", jsonObject);            System.out.println(jsOb);           /*           {"persons":{"person3":"Person{address='南昌', id=3, name='王五'}",                       "person1":"Person{address='北京', id=1, name='张三'}",                       "person2":"Person{address='上海', id=2, name='李四'}"                      }           }            */            JSONArray jarray = new JSONArray();            jarray.put(0, "张三");            jarray.put(1, "上海");            jarray.put(2, "南昌");            JSONObject js = new JSONObject();            js.put("array", jarray);            System.out.println(js);            //{"array":["张三","上海","南昌"]}            //解析array            JSONObject jsonob = new JSONObject(js.toString());            JSONArray jsona = jsonob.getJSONArray("array");            String string1 = jsona.getString(0);            String string2 = jsona.getString(1);            String string3 = jsona.getString(2);            System.out.println(string1 + ":" + string2 + ":" + string3);            //张三:上海:南昌        } catch (JSONException e) {            e.printStackTrace();        }    }}
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