springboot返回值支持JSON和XML

在springboot实现，即支持JSON数据返回格式，也能同时支持XML

在前端调用的时候添加

Accept:application/xml 或者Accept:application/json

返回对应的格式

添加依赖

<dependency>
      <groupId>com.alibaba</groupId>
       <artifactId>fastjson</artifactId>
       <version>1.2.47</version>
</dependency>

<dependency>
       <groupId>com.fasterxml.jackson.dataformat</groupId>
       <artifactId>jackson-dataformat-xml</artifactId>
       <version>2.11.0.rc1</version>
</dependency>

实体类user.java

package com.example.demo.model;

import lombok.*;
import org.hibernate.annotations.CreationTimestamp;

import javax.persistence.*;
import java.util.Date;

@Entity
@Table(name = "users")
@Data
@Builder
@ToString(callSuper = true)
@NoArgsConstructor
@AllArgsConstructor
public class Users {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private String name;
    @Column(updatable = false)
    @CreationTimestamp
    private Date createTime;
}

数据访问层接口 UsersRepository.java

package com.example.demo.repository;

import com.example.demo.model.Users;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface UsersRepository extends JpaRepository<Users,Integer> {
}

控制器 测试方法 usersAdd

@RequestMapping("/users/add")
    public Users usersAdd(@RequestParam String name) {

        Users user = Users.builder().name(name).build();
        log.info("User {}", user);
        usersRepository.save(user);
        return user;
}

启动项目

使用postman

测试url

　　http://127.0.0.1:8080/users/add

参数 name 为 aaa

当 header 的 Accept 为 application/xml

返回

<Users>

    <id>449</id>

    <name>aaa</name>

    <createTime>2020-04-02T06:57:08.997+0000</createTime>

</Users>

当 header 的 Accept 为 application/json

返回

{

    "id": 450,

    "name": "aaa",

    "createTime": "2020-04-02T07:00:19.027+0000"

}