Java实现JSONObject对象与Json字符串互相转换

JSONObject 转 JSON 字符串

Java代码：

JSONObject jsonObject = new JSONObject();
        jsonObject.put("name","wjw");
        jsonObject.put("age",22);
        jsonObject.put("sex","男");
        jsonObject.put("school","商职");
        String jsonStr = JSONObject.toJSONString(jsonObject);
        System.out.println(jsonStr);

执行结果：

{"school":"商职","sex":"男","name":"wjw","age":22}

JSON 字符串 转 JSONObject 对象

Java代码：

String jsonStr = "{\"school\":\"商职\",\"sex\":\"男\",\"name\":\"wjw\",\"age\":22}";
        JSONObject jsonObject = JSONObject.parseObject(jsonStr);
        System.out.println(jsonObject.getString("name"));
        System.out.println(jsonObject.getInteger("age"));

执行结果：

wjw
22

实体类 转 JSONObject对象

创建Person类：

package c;

public class Person {

    private String name; // 姓名

    private int age;  // 年龄

    private String sex;  // 性别

    private String school;  // 学校

    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 getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getSchool() {
        return school;
    }

    public void setSchool(String school) {
        this.school = school;
    }
}

创建 Person 对象：

Person person = new Person();
        person.setName("wjw");
        person.setAge(22);
        person.setSex("男");
        person.setSchool("商职");
        String personStr = JSONObject.toJSONString(person);  // 转换为json字符串
        System.out.println("personStr:"+personStr);
        JSONObject personObject = JSONObject.parseObject(personStr);  // 转换为json对象
        System.out.println("personObject:"+personObject);
        System.out.println("name:"+personObject.getString("name"));

打印结果：

personStr:{"age":22,"school":"商职","sex":"男"}
personObject:{"school":"商职","age":22}
name:wjw