fastjson

package com;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;

public class JsonUtil {
	
	/**


	 */
	public static void main(String[] args) {
		
		System.out.println("----1.0-------");
		//1.0  对象和对象数组转json,自定义json字段
		JSONArray jsons=new JSONArray();
		JSONObject json=new JSONObject();
		json.put("id",1);
		json.put("name","ssss");
		jsons.add(json);
		
		System.out.println(json);
		System.out.println(jsons);
		System.out.println("----2.0-------");
		//2.0   json转对象
		String json1 = "{"id":"22","name":"乌鲁木齐"}"; 
		
		User user = (User)JSON.toJavaObject(JSON.parSEObject(json1),User.class);
		System.out.println(user.getId()+","+user.getName());
		System.out.println("----3.0-------");
		//3.0   json转对象数组
		List<User> users=new ArrayList<User>();
		String json2 = "[{"id":"22","name":"乌鲁木齐"},{"id":"23","name":"搜索"}]"; 
		JSONArray array = JSONArray.parseArray(json2);
		for(int i = 0; i < array.size();i++){
			JSONObject jobj = (JSONObject)array.get(i);
			User user2 = JSON.toJavaObject(jobj,User.class);
			users.add(user2);
		}
		for(User u:users){
			System.out.println(u.getName());
		}
		System.out.println("----4.0-------");
		//4.0  将JSON字符串转换为JSON对象   
        JSONObject json5 = JSON.parSEObject("{"id":"22","name":"乌鲁木齐"}");  
        System.out.println(json5);
        System.out.println("----5.0-------");
       //5.0  将JSON字符串转换为JavaBean对象  
        User user5 = JSON.parSEObject("{"id":"22","name":"乌鲁木齐"}",User.class);  
        System.out.println(user5.getName());
        System.out.println("----6.0-------");
		//6.0    将JavaBean对象转换为JSON字符串
        String jsonObject = JSON.toJSONString(user);  
        System.out.println(jsonObject);
        System.out.println("----7.0-------");
		//7.0   将JavaBean对象转换为JSON对象
        JSONObject userJson = (JSONObject) JSON.toJSON(user);
        System.out.println(userJson.toString());
        System.out.println("----8.0-------");
        //8.0  将JavaBean对象转换为JSON字符串
        String jsonObject8 = JSON.toJSONString(users);  
        System.out.println(jsonObject8);
        System.out.println("----9.0-------");
        //9.0 date 
        Date date=new Date();   
        //输出毫秒值 
        System.out.println(JSON.toJSONString(date)); 
        //默认格式为yyyy-MM-dd HH:mm:ss   
        System.out.println(JSON.toJSONString(date,SerializerFeature.WriteDateUseDateFormat)); 
        //根据自定义格式输出日期  
        System.out.println(JSON.toJSONStringWithDateFormat(date,"yyyy-MM-dd",SerializerFeature.WriteDateUseDateFormat));
	}
}

package com;

import java.util.Date;

public class User {
	
	private int id;
	private String name;
	private Date date;
	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 Date getDate() {
		return date;
	}
	public void setDate(Date date) {
		this.date = date;
	}
	
	

}

（编辑：李大同）

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