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1.解析json字符串
将json字符串转换为json对象,然后再解析json对象:。
JSONObjectjsonObject = JSONObject.fromObject(jsonStr);
根据json中的键得到它的值
Stringname = jsonObject.getString("name");
int age = jsonObject.getInt("age");
2.将json字符串转换为java对象
同样先将json字符串转换为json对象,再将json对象转换为java对象,如下所示。
JSONObjectobj = new JSONObject().fromObject(jsonStr);//将json字符串转换为json对象
将json对象转换为java对象
Personjb = (Person)JSONObject.toBean(obj,Person.class);//将建json对象转换为Person对象
3.将java对象转换为json字符串
先将java对象转换为json对象,在将json对象转换为json字符串
JSONObjectjson = JSONObject.fromObject(obj);//将java对象转换为json对象
Stringstr = json.toString();//将json对象转换为字符串
实例代码:
package Test3; public class Person { private int age; public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } private String name; public String toString() { return "Person [age=" + age + ", name=" + name + "]"; } public Person(int age, String name) { super(); this.age = age; this.name = name; } public Person(String personStr){ } public Person(){ } }
package Test3; import net.sf.json.JSONObject; public class JsonToObject { /** * @param args */ public void test(){ System.out.println("将object对象,字符串转为json对象"); Person person = new Person(1, "cgf"); JSONObject json = JSONObject.fromObject(person); System.out.println(json); System.out.println("将字符串转成JSON对象,再转为自定义对象"); String jsonString = "{" + "age" + ":1" + "," + "name" + ":" + "'wbj'" + "}"; JSONObject jsonObject = JSONObject.fromObject(jsonString); System.out.println(jsonObject); Person person1 = (Person) JSONObject.toBean(jsonObject, Person.class); System.out.println("名字:"+person1.getAge() + "年龄:" + person1.getName()); System.out.println("将Java对象转为json字符串"); JSONObject json1 = JSONObject.fromObject(person); String jsonString1 = json1.toString(); System.out.println(jsonString1); } public static void main(String[] args) { // TODO Auto-generated method stub JsonToObject json = new JsonToObject(); json.test(); } }
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原文地址:http://blog.csdn.net/baidu_21578557/article/details/52075711