fastjson使用实例

来源：互联网发布：淘宝上的积分怎么用编辑：程序博客网时间：2024/05/21 07:07

转自：http://blog.csdn.net/earbao/article/details/39450393

[java] view plain copy
 

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<javabean>转化示例开始----------");
Person person1 = new Person("1","fastjson1",1);
Person person2 = new Person("2","fastjson2",2);
List<Person> persons = new ArrayList<Person>();
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<Person> 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<javabean>转化示例结束----------");
}
static void method3(){
System.out.println("List<String>转化示例开始----------");
List<String> list = new ArrayList<String>();
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<String> list2 = JSON.parseObject(jsonString,new TypeReference<List<String>>(){});
System.out.println(list2.get(0)+"::"+list2.get(1)+"::"+list2.get(2));
System.out.println("List<String>转化示例结束----------");
}
static void method4(){
System.out.println(" List<Map<String,Object>>转化示例开始 ----------");
Map<String,Object> map = new HashMap<String,Object>();
map.put("key1", "value1");
map.put("key2", "value2");
Map<String,Object> map2 = new HashMap<String,Object>();
map2.put("key1", 1);
map2.put("key2", 2);
List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
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<Map<String,Object>> list2 = JSON.parseObject(jsonString,new TypeReference<List<Map<String,Object>>>(){});
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"));
}
}

0 0