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/

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

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

<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/

<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

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

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

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()+"==========");

}

}