如何在Android Studio 中使用fastjson

2025年03月15日 20:19
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参考如下内容:
package junit.test;

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

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
/*
* 这里将json的转化和解析都放在一起了,大家可以根据实际需要来转化json字符串和解析json字符串
*/
public class TestFastJson {

static class Person{
private String id ;
private String name;
private int age ;

public Person(){

}
public Person(String id,String name,int age){
this.id=id;
this.name=name;
this.age=age;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
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;
}
@Override
public String toString() {
return "Person [age=" + age + ", id=" + id + ", name=" + name + "]";
}

}
public static void main(String[] args) {
method1();
method2();
method3();
method4();
}

static void method1(){
System.out.println("javabean转化示例开始----------");
Person person = new Person("1","fastjson",1);

//这里将javabean转化成json字符串
String jsonString = JSON.toJSONString(person);
System.out.println(jsonString);
//这里将json字符串转化成javabean对象,
person =JSON.parseObject(jsonString,Person.class);
System.out.println(person.toString());

System.out.println("javabean转化示例结束----------");
}

static void method2(){
System.out.println("List转化示例开始----------");

Person person1 = new Person("1","fastjson1",1);
Person person2 = new Person("2","fastjson2",2);
List persons = new ArrayList();
persons.add(person1);
persons.add(person2);
String jsonString = JSON.toJSONString(persons);
System.out.println("json字符串:"+jsonString);

//解析json字符串
List persons2 = JSON.parseArray(jsonString,Person.class);
//输出解析后的person对象,也可以通过调试模式查看persons2的结构
System.out.println("person1对象:"+persons2.get(0).toString());
System.out.println("person2对象:"+persons2.get(1).toString());

System.out.println("List转化示例结束----------");
}

static void method3(){
System.out.println("List转化示例开始----------");
List list = new ArrayList();
list.add("fastjson1");
list.add("fastjson2");
list.add("fastjson3");
String jsonString = JSON.toJSONString(list);
System.out.println("json字符串:"+jsonString);

//解析json字符串
List list2 = JSON.parseObject(jsonString,new TypeReference>(){});
System.out.println(list2.get(0)+"::"+list2.get(1)+"::"+list2.get(2));
System.out.println("List转化示例结束----------");

}

static void method4(){
System.out.println(" List>转化示例开始 ----------");
Map map = new HashMap();
map.put("key1", "value1");
map.put("key2", "value2");
Map map2 = new HashMap();
map2.put("key1", 1);
map2.put("key2", 2);
List> list = new ArrayList>();
list.add(map);
list.add(map2);
String jsonString = JSON.toJSONString(list);
System.out.println("json字符串:"+jsonString);
//解析json字符串
List> list2 = JSON.parseObject(jsonString,new TypeReference>>(){});

System.out.println("map的key1值"+list2.get(0).get("key1"));
System.out.println("map的key2值"+list2.get(0).get("key2"));
System.out.println("ma2p的key1值"+list2.get(1).get("key1"));
System.out.println("map2的key2值"+list2.get(1).get("key2"));
}

}

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