几种常用的json序列化和反序列化工具介绍

一、前言

　　Json序列化和反序列化工作中会时常用到，也是目前数据交互的常用格式，Rest风格的接口加上json格式的数据交互，真的是天作之合。

　　目前Json字符与Json对象的相互转换方式有很多，接下来将为大家一一介绍下，感兴趣的朋友可以参考下哈，希望可以帮助到你

二、工具介绍

　　这次为大家介绍常用的三种工具

      1、Fastjson：http://fastjson.codeplex.com/

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<dependency>     <groupId>com.alibaba</groupId>     <artifactId>fastjson</artifactId>     <version>1.2.12</version> </dependency>

 

　　2、Jackson：http://jackson.codehaus.org/

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<dependency>             <groupId>com.fasterxml.jackson.core</groupId>             <artifactId>jackson-core</artifactId>             <version>2.8.0.rc1</version>         </dependency>         <dependency>     <groupId>com.fasterxml.jackson.core</groupId>     <artifactId>jackson-annotations</artifactId>     <version>2.8.0.rc1</version> </dependency> <dependency>     <groupId>com.fasterxml.jackson.core</groupId>     <artifactId>jackson-databind</artifactId>     <version>2.8.0.rc1</version> </dependency>

　　3、Gson：http://code.google.com/p/google-gson/

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<dependency>     <groupId>com.google.code.gson</groupId>     <artifactId>gson</artifactId>     <version>2.6.2</version> </dependency>

　　

三、工具使用

　　1、首先创建两个类，一个Student 类，一个Teacher类 代码如下：

　　     Student.java

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package com.zsy.model;   public class Student {           String name;     int age;     String sex;     Teacher teacher;       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;     }       public String getSex() {         return sex;     }       public void setSex(String sex) {         this.sex = sex;     }       public Teacher getTeacher() {         return teacher;     }       public void setTeacher(Teacher teacher) {         this.teacher = teacher;     }   }

　　   Teacher.java

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package com.zsy.model;   public class Teacher {           String name;     String Sex;     int age;     public String getName() {         return name;     }     public void setName(String name) {         this.name = name;     }     public String getSex() {         return Sex;     }     public void setSex(String sex) {         Sex = sex;     }     public int getAge() {         return age;     }     public void setAge(int age) {         this.age = age;     } }

　　　2、使用方法

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import java.io.IOException;   import com.alibaba.fastjson.JSON; import com.fasterxml.jackson.databind.ObjectMapper; import com.google.gson.Gson; import com.zsy.model.Student; import com.zsy.model.Teacher;   public class Test {           public static void main(String args[]) throws IOException{                   Student student=new Student();         student.setName("小明");         student.setAge(10);         student.setSex("男");                   Teacher teacher=new Teacher();         teacher.setName("lisa");         teacher.setAge(35);         teacher.setSex("女");         student.setTeacher(teacher);                   //jackson-core obj->json         ObjectMapper mapper=new ObjectMapper();         String json=mapper.writeValueAsString(student);         System.out.println(json);         //jsckson json->obj         Student studentObj=mapper.readValue(json, Student.class);         System.out.println(studentObj.getName()+"=======");                   //GSON 序列化 obj->json         String jsonstr = new Gson().toJson(student);          System.out.println(jsonstr);         //GSON 反序列化 json->obj         Student myobj = new Gson().fromJson(jsonstr, Student.class);          System.out.println(myobj.getName()+"=======");                             //alibaba  fastJson         String jsons=JSON.toJSONString(studentObj);         System.out.println(jsons);                   Student stu=JSON.parseObject(json, Student.class);         System.out.println(stu.getName()+"==========");               }   }