fastjson使用TypeReference示例

    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"));  
        }  
          
    }  

本文转自：https://blog.csdn.net/qq_16504067/article/details/78081746