使用JSONlib简单的转换json操作

在使用jsonlib操作之前 需要引入json及5个依赖包，依赖包版本不能最新，lang与collections有不兼容现象。



官方地址：http://json-lib.sourceforge.net/

以下是简单的实例代码，展现了几个转换的基本操作

json --> javabean

javabean --> json

array -->json

map -->json

......

package com.xx.test;

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

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class TestJsonLib {
@Override
public String toString() {
return "TestJsonLib [name=" + name + ", age=" + age + ", gender=" + gender + "]";
}
public TestJsonLib() {
super();
// TODO Auto-generated constructor stub
}
public TestJsonLib(String name, int age, String gender) {
super();
this.name = name;
this.age = age;
this.gender = gender;
}
private String name = null;
private int age = 1;
private String gender = "female";
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 String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public static void main(String[] args){

//JSONObject.fromObject()  转换为json对象
//JSONObject.toBean() 转换为javabean对象

//json对象 --> String
JSONObject jsonObj = new JSONObject();
jsonObj.put("b1", "String01");
jsonObj.put("b2", "String02");
jsonObj.put("b3", "String03");
JSONArray jsonArray = new JSONArray();
jsonArray.add(jsonObj);
System.out.println(jsonArray);//[{"b1":"String01","b2":"String02","b3":"String03"}]

//数组转化为json格式，list也是一种数组格式
List<String> list = new ArrayList<>();
list.add("book1");
list.add("book2");
list.add("book3");
JSONArray arr = JSONArray.fromObject(list);
System.out.println(arr);//["book1","book2","book3"]

//Map键值对转换为json格式
Map<String,String> myMap = new HashMap<>();
myMap.put("book1","javacore");
myMap.put("book2","thinking in java");
myMap.put("book3","test java");
JSONObject obj = JSONObject.fromObject(myMap);
System.out.println(obj); //{"book3":"test java","book1":"javacore","book2":"thinking in java"}

//javabean --> json格式
JSONObject personInfo = JSONObject.fromObject(new TestJsonLib("Eric",23,"female"));
System.out.println(personInfo);//{"age":23,"gender":"female","name":"Eric"}

//json --> javabean
String content = "{\"age\":25,\"gender\":\"male\",\"name\":\"Jack\"}";
JSONObject jsonString = JSONObject.fromObject(content);
//转换为javabean
TestJsonLib jsonInfo = (TestJsonLib)JSONObject.toBean(jsonString, TestJsonLib.class);
System.out.println(jsonInfo);//TestJsonLib [name=Jack, age=25, gender=male]

}

}