SpringMVC自定义返回XML/JSON数据

1、添加jackson依赖

compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.9.0'

2、开启<mvc:annotation-driven /> 注解

3、编写JavaBean

package cn.bjut.entity;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElementpublic class Person {    private String name;    private int age;    public Person() {    }    public Person(String name, int age) {        this.name = name;        this.age = age;    }    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{" +                "name='" + name + '\'' +                ", age=" + age +                '}';    }}

4、编写Controller

    @ResponseBody    @RequestMapping(value = "/json", method = RequestMethod.GET)    public Person test1() {        Person person = new Person();        person.setAge(25);        person.setName("你大爷");        return person;    }

• 如果没有配置Person类的@XmlRootElement注解,那么只会返回JSON数据,无论Accept是什么
• 如果配置了Person类的XML注解,那么如果Accept含有applicatin/xml, 就会返回xml数据
  因为浏览器默认包含了Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8 所以直接访问会返回XML数据
• 如果改为accept: "application/json",即可返回JSON数据
• 也可以通过指定URI后缀的方式来改变
  
  • http://localhost:8080/SpringMVCDemo/json.json 返回JSON数据
  • http://localhost:8080/SpringMVCDemo/json.xml 返回XML数据