Map2Json.java

package json;

import java.util.HashMap;

import java.util.Map;

import net.sf.json.JSONArray;

public class Map2Json {

    public static void main(String[] args) {

       Map<String, String> map = new HashMap<String, String>();

       map.put("姓名","张三");

       map.put("年龄","22");

       map.put("性别","男");

       JSONArray jsonArray = JSONArray.fromObject(map);

       System.out.println(jsonArray.toString());

    }

}

List2json.java

package json;

import java.util.ArrayList;

import java.util.List;

import net.sf.json.JSONArray;

public class List2Json {

         public static void main(String[] args) {

                   List<String> list = new ArrayList<String>();

                   list.add("aa");

                   list.add("bb");

                   list.add("cc");

                   list.add("dd");

                   JSONArray jsonArray = JSONArray.fromObject(list);

                   System.out.println(jsonArray.toString());

         }

}

Person.java

package json;

import java.util.Date;

public class Person {

    private Stringname;

    private Stringsex;

    private int age;

    private Stringaddress;

    private Datebirthday;

    public String getName() {

       returnname;

    }

    public void setName(String name) {

       this.name = name;

    }

    public String getSex() {

       returnsex;

    }

    public void setSex(String sex) {

       this.sex = sex;

    }

    public int getAge() {

       returnage;

    }

    public void setAge(int age) {

       this.age = age;

    }

    public String getAddress() {

       returnaddress;

    }

    public void setAddress(String address) {

       this.address = address;

    }

    public Date getBirthday() {

       returnbirthday;

    }

    public void setBirthday(Date birthday) {

       this.birthday = birthday;

    }

    public Person(String name, String sex,int age, String address,

           Date birthday) {

       super();

       this.name = name;

       this.sex = sex;

       this.age = age;

       this.address = address;

       this.birthday = birthday;

    }

    public Person() {

       super();

       // TODO Auto-generated constructor stub

    }

}

Bean2Json.java

package json;

import java.util.Date;

import net.sf.json.JSONArray;

public class Bean2Json {

   public static void main(String[] args) {

      Person person = new Person();

      person.setAddress("深圳福田");

      person.setAge(22);

      person.setBirthday(new Date());

      person.setName("张三");

      person.setSex("男");

      JSONArray jsonArray = JSONArray.fromObject(person);

      System.out.println(jsonArray.toString());

   }

}

Json2Map.java

package json;

import java.util.HashMap;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

import net.sf.json.JSONObject;

public class Json2Map {

    public static void main(String[] args) {

       String jsonStr = "{‘性别‘:‘男‘,‘姓名‘:‘张三‘,‘年龄‘:‘22‘}";

       JSONObject object = JSONObject.fromObject(jsonStr);

       Map<String,String> map = new HashMap<String,String>();

       Set<String> keySet = object.keySet();

       for (String key : keySet) {

           map.put(key, object.getString(key));

       }

       Set<Entry<String,String>> entrySet = map.entrySet();

       for (Entry<String, String> entry : entrySet) {

           System.out.println(entry.getKey()+":"+entry.getValue());

       }

    }

}