json字符串，JSONObject对象，JavaBean对象互转。

全栈程序员-站长 • 2026年3月17日上午11:20 • 未分类 • 阅读 2

包名：import net.sf.json.JSONObject;

1.maven地址

 
   
   
     net.sf.json-lib 
    
   
     json-lib 
    
   
     2.4 
    
   
     jdk15

2.People对象详情如下：

package pojo; public class People { private int id; private int age; private String name; public People(int id, int age, String name) { super(); this.id = id; this.age = age; this.name = name; } public People() { super(); } public int getId() { return id; } public void setId(int id) { this.id = id; } public int getAge() { return age; } public String getName() { return name; } public void setAge(int age) { this.age = age; } public void setName(String name) { this.name = name; } @Override public String toString() { return "People [id=" + id + ", age=" + age + ", name=" + name + "]"; } }

3.json字符串转为JSONObject对象：

String jsonStr = "{\"name\":\"1\",\"age\":1,\"id\":0}"; // json字符串转为JSONObject 对象 JSONObject jsonObject = JSONObject.fromObject(jsonStr); System.out.println("name:" + jsonObject.get("name")); System.out.println("age:" + jsonObject.get("age")); System.out.println("id:" + jsonObject.get("id"));

4.JSONObject转为json字符串：

// JSONObject转为json字符串 String string = jsonObject.toString(); System.out.println("string" + string);

5.JSONObject对象转化为javaBean对象：

// JSONObject转为javaBean People people = (People)JSONObject.toBean(jsonObject, People.class); System.out.println(people);

6.有时候，我们需要将一个集合json转化为一个java的List 集合：

例如如下的一个json字符串：

[{"age":1,"id":1,"name":"first"}, {"age":2,"id":2,"name":"second"}, {"age":3,"id":3,"name":"third"}]

这个json字符串中包含的数据可以转化为一个List 集合，代码如下：

// 将List的Json字符串转化为List 
  
    集合 String listStr = "[{\"age\":1,\"id\":1,\"name\":\"first\"},{\"age\":2,\"id\":2,\"name\":\"second\"},{\"age\":3,\"id\":3,\"name\":\"third\"}]"; JSONArray jsonArray2 = JSONArray.fromObject(listStr); List 
   
     peopleList2 = (List 
    
      )JSONArray.toCollection(jsonArray2, People.class); for(People peo : peopleList2) { System.out.println(peo); }

7.JSONArray的遍历：

List 
  
    peopleList = new ArrayList 
   
     (); peopleList.add(new People(1,1,"first")); peopleList.add(new People(2,2,"second")); peopleList.add(new People(3,3,"third")); JSONArray jsonArray = JSONArray.fromObject(peopleList); // JSONArray的遍历 for (int i = 0; i < jsonArray.size(); i++) { JSONObject jsonObject2 = jsonArray.getJSONObject(i); People people1 = (People)jsonObject.toBean(jsonObject2, People.class); System.out.println(people1); }

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