java - Spring - 为什么返回值在屏幕中显示 XML 类型？

Question

我有一个问题。 我正在使用Spring框架，我想返回Json数据

当我调用时，它会在 Postman 中返回 XML 类型。

但在控制台中打印了 Json 类型

这是 Controller

@Autowired
MobileUserService mobileUserService;

@RequestMapping(value = "/mobile/mobileuser.do")
@ResponseBody
public HashMap<String, Object> selectUser(
        @RequestParam(value="userId", required = false) String userId,
        @RequestParam(value="userPwd", required = false) String userPwd,
        HttpServletRequest request) {
    HashMap<String, Object> selectMap = mobileUserService.selectUser(userId, userPwd);

    System.out.println("userid: " + userId + "userPW : " + userPwd);

    if(selectMap == null) {
        selectMap = new HashMap<String, Object>();
        selectMap.put("code", -1);
        selectMap.put("msg", "Check ID or Password");
    }else {
        selectMap.put("code", 0);
        selectMap.put("msg", "Success");
    }
    System.out.println("sdfsdfsdf " + selectMap);
    return selectMap;
}

我在 pom.xml 中添加了依赖项

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.13</version>
</dependency>

服务器上下文.xml

<bean id=“jacksonMessageConverter” class=“org.springframework.http.converter.json.MappingJackson2HttpMessageConverter”/>

我怎么能这样？

Answer 1

将您的请求映射更改为

@RequestMapping(method = RequestMethod.GET, produces = "application/json")