- 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"));
- }
- }
时间: 2024-10-24 11:56:19