fastJson使用实例

你的名字 2020-11-20 18:04 834阅读 0赞

**1.fastjson坐标**

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.39</version>
    </dependency>

**2.实例：**

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;  
    
    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();  
        }  
    
        /* 对象的序列化和反序列化 */  
        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----------");  
        }  
    
        /* *List<javabean>的序列化和反序列化 */  
        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----------");  
        }  
    }