ResponseBody上的方法工作不正确

ResponseBody上的方法工作不正确

本文介绍了@RestController没有@ResponseBody上的方法工作不正确的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有以下控制器:

  @RestController 
@RequestMapping(value =/ base / url )
public class MyController {

@RequestMapping(
value =/ child / url,
method = RequestMethod.POST

@ResponseBody
public String mmm(){
returnOk;
}
}

现在它的工作(服务器响应 Ok ),但我认为 @ResponseBody 多余,因为我们使用 @RestController @ResponseBody注释



,我看到以下服务器响应:

  ; html> 
< head>
< meta http-equiv =Content-Typecontent =text / html; charset = ISO-8859-1/>
< title>错误404未找到< / title>
< / head>
< body>
< h2> HTTP错误404< / h2>
< p>问题访问/ base / url / child / url / Ok。原因:

< pre>找不到< / pre>
< / p>
< hr />
< i>
< small>由Jetty提供://< / small>
< / i>
< br />
< Br />
< br />
< br />
< br />
< br />
< Br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />
< br />


< / body>
< / html>你可以解释一下这个行为吗?




PS



春季版本: 4.1.6.RELEASE



PS



我只找到了与mvc config相关的部分:

 < context:annotation-config /> 

< context:component-scan base-package =base.package/>


解决方案

@RestController 您必须显式启用新的注释处理类。通过添加< mvc:annotation-driven /> (对于XML)或 @EnableWebMvc )。



默认情况下, DispatcherServlet 注册现在已弃用的 AnnotationMethodHandlerAdapter DefaultAnnotationHandlerMapping ,它可以被认为是前任或更新的东西。


I have the following controller:

@RestController
@RequestMapping(value = "/base/url")
public class MyController {

    @RequestMapping(
            value = "/child/url",
            method = RequestMethod.POST
    )
    @ResponseBody
    public String mmm() {
        return "Ok";
    }
}

Now its working(server response Ok) but I thought that @ResponseBody redundant because we use @RestController and removed @ResponseBody annotation

and I see following server response:

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
        <title>Error 404 Not Found</title>
    </head>
    <body>
        <h2>HTTP ERROR 404</h2>
        <p>Problem accessing /base/url/child/url/Ok. Reason:

            <pre>    Not Found</pre>
        </p>
        <hr />
        <i>
            <small>Powered by Jetty://</small>
        </i>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>


    </body>
</html>

Can you explain this behaviour ?

P.S.

Spring version: 4.1.6.RELEASE

P.S.

I have found only this part related to mvc config:

<context:annotation-config/>

<context:component-scan base-package="base.package"/>
解决方案

To be able to use @RestController you have to explicitly enable the new annotation processing classes. By either adding <mvc:annotation-driven /> (for XML) or @EnableWebMvc (for Java Config).

By default the DispatcherServlet registers the, now deprecated, AnnotationMethodHandlerAdapter and DefaultAnnotationHandlerMapping which can be considered the predecessor or the newer stuff.

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08-11 04:12