如何使用Java中的JSON-lib API将JSON对象转换为bean？

JSONObject类是一个包含名称/值对（无序）的集合，其中bean是一个具有其成员字段的setter和getter方法的类。我们可以使用JSONObject类的toBean()方法将JSON对象转换为bean。

语法

public static Object toBean(JSONObject jsonObject, Class beanClass)

import net.sf.json.JSONObject; public class ConvertJSONObjToBeanTest { public static void main(String[] args) { mployee emp = new Employee("Sai", "Ram", 30, "Bangalore"); JSONObject jsonObj = JSONObject.fromObject(emp); System.out.println(jsonObj.toString(3)); // pretty print JSON emp = (Employee)JSONObject.toBean(jsonObj, Employee.class); System.out.println(emp.toString()); } // Employee class public static class Employee { private String firstName, lastName, address; private int age; public Employee() { } public Employee(String firstName, String lastName, int age, String address) { super(); this.firstName = firstName; this.lastName = lastName; this.age = age; this.address = address; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String toString() { return "Employee[ " + "firstName = " + firstName + ", lastName = " + lastName + ", age = " + age + ", address = " + address + " ]"; } } }

输出

{
 "firstName": "Sai",
 "lastName": "Ram",
 "address": "Bangalore",
 "age": 30
}
Employee[ firstName = Sai, lastName = Ram, age = 30, address = Bangalore ]

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