Spring/Rest @PathVariable字符编码

Question

在我正在使用的环境(Tomcat 6)中,路径段中的百分比序列显然在映射到@PathVariable时使用ISO-8859-1进行解码.

我希望它是UTF-8.

我已经将Tomcat配置为使用UTF-8(使用server.xml中的URIEncoding属性).

Spring/Rest是自己进行解码吗？如果是,我可以在哪里覆盖默认编码？

附加信息; 这是我的测试代码:

@RequestMapping( value = "/enc/{foo}", method = RequestMethod.GET )
public HttpEntity<String> enc( @PathVariable( "foo" ) String foo, HttpServletRequest req )
{
  String resp;

  resp = "      path variable foo: " + foo + "\n" + 
         "      req.getPathInfo(): " + req.getPathInfo() + "\n" +
         "req.getPathTranslated(): " + req.getPathTranslated() + "\n" + 
         "    req.getRequestURI(): " + req.getRequestURI() + "\n" + 
         "   req.getContextPath(): " + req.getContextPath() + "\n";

  HttpHeaders headers = new HttpHeaders();
  headers.setContentType( new MediaType( "text", "plain", Charset.forName( "UTF-8" ) ) );
  return new HttpEntity<String>( resp, headers );
}

如果我使用以下URI路径执行HTTP GET请求:

/TEST/enc/%c2%a3%20and%20%e2%82%ac%20rates

这是UTF-8编码的百分比编码形式

/TEST/enc/£ and € rates

我得到的输出是:

      path variable foo: £ and ⬠rates
      req.getPathInfo(): /enc/£ and € rates
req.getPathTranslated(): C:\Users\jre\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\TEST\enc\£ and € rates
    req.getRequestURI(): /TEST/enc/%C2%A3%20and%20%E2%82%AC%20rates
   req.getContextPath(): /TEST

对我来说,显示Tomcat(在设置URIEncoding属性之后)做正确的事情(参见getPathInfo()),但路径变量仍在ISO-8859-1中解码.

答案是:

Spring/Rest显然使用了请求编码,这是一件非常奇怪的事情,因为这是关于正文,而不是URI.叹.

添加这个:

<filter>
  <filter-name>CharacterEncodingFilter</filter-name>
  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

解决了这个问题.它应该更简单.

实际上,情况更糟:

如果该方法确实具有请求主体,并且该方法未以UTF-8编码,则需要额外的forceEncoding参数.这似乎有效,但我担心它会在以后引起更多问题.

另一种方法

与此同时,我发现可以禁用解码,我的指定

<property name="urlDecode" value="false"/>

......在这种情况下,收件人可以做正确的事 ; 但当然这会让很多其他事情变得更难.

Answer 1

我需要在web.xml中添加过滤器

<filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>