/** *  */package net.nyist.jsondemo.servlet;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.json.JSONObject;/** * @author yuchao * * @school 南阳理工软件学院移动设备应用与开发11软工移动四班 * * @time  2014-9-17 下午9:24:29 */public class JSONDemo {         public static void main(String[] args) {                  Map<String, Object> map =new HashMap<String, Object>();         List<Map<String, Object>> list =new ArrayList<Map<String, Object>>();         map.put("age", 12);         map.put("name", "yuchao");         list.add(map);         map =new HashMap<String, Object>();         map.put("age", 21);         map.put("name", "zhangsan");         list.add(map);         map =new HashMap<String, Object>();         map.put("users", list);         JSONObject jsonObject  =new JSONObject(map);         System.out.println(jsonObject.toString());    }}

/** *  */package net.nyist.jsondemo.entity;import java.io.Serializable;/** * @author yuchao * * @school 南阳理工软件学院移动设备应用与开发11软工移动四班 * * @time  2014-9-17 下午11:53:32 */@SuppressWarnings("serial")public class Address implements Serializable{       private String codeNumber;    private String city;    public String getCodeNumber() {        return codeNumber;    }    public void setCodeNumber(String codeNumber) {        this.codeNumber = codeNumber;    }    public String getCity() {        return city;    }    public void setCity(String city) {        this.city = city;    }    }/** *  */package net.nyist.jsondemo.entity;import java.io.Serializable;/** * @author yuchao *  * @school 南阳理工软件学院移动设备应用与开发11软工移动四班 *  * @time 2014-9-17 下午11:54:43 */@SuppressWarnings("serial")public class User implements Serializable{    private int id;    private String name;    private int age;    private Address address;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public Address getAddress() {        return address;    }    public void setAddress(Address address) {        this.address = address;    }}/** *  */package net.nyist.jsondemo.servlet;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import net.nyist.jsondemo.entity.Address;import net.nyist.jsondemo.entity.User;import org.json.JSONArray;/** * @author yuchao * * @school 南阳理工软件学院移动设备应用与开发11软工移动四班 * * @time  2014-9-17 下午11:53:03 */public class JSONObjectDemo {         public static void main(String[] args) {                     Address address =new Address();           address.setCity("河南南阳");           address.setCodeNumber("473000");           User user =new User();           user.setId(1);           user.setName("yuchao");           user.setAddress(address);           Map<String , Object> map =new HashMap<String, Object>();           List<User> list =new ArrayList<User>();           list.add(user);           address =new Address();           address.setCity("河南郑州");           address.setCodeNumber("473000");           user =new User();           user.setId(2);           user.setName("liling");           user.setAddress(address);           list.add(user);           map.put("users", list);           JSONArray jsonArray =new JSONArray();           jsonArray.put(map);           System.out.println(jsonArray.toString(3));               } }