我正在使用 SPRING MVC。从客户端到控制器，我使用以下 xml 进行了 PUT。
<http-request method="PUT" url="/serviceproviders/{sp_id}/accessNumbers/{new_an_id}/languages" mime="application/xml">
<content>
<![CDATA[
<additionalLanguages xmlns="http://www.XXX.com/pcs/model/schemas">
<additionalLangIds>1003</additionalLangIds>
</additionalLanguages>
]]>
</content>
AdditionalLanguages 是 java 类，声明如下
@XmlRootElement(name = "additionalLanguages")
@XmlAccessorType(XmlAccessType.NONE)
public class AdditionalLanguages implements Serializable{
@XmlElement(name="additionalLangIds")
private String sLanguageIDs = "";
//getter & setter for sLanguageIDs
}
控制器正在返回“org.springframework.web.servlet.view.RedirectView”的视图。这个视图本质上是为相同的 url "/serviceproviders/{sp_id}/accessNumbers/{new_an_id}/languages" 调用 GET，它返回 AdditionalLanguages 类的实例。
最后，我希望在浏览器“1003”中收到响应，这不过是
<HTML>
<BODY>
<additionalLanguages xmlns="http://www.XXX.com/pcs/model/schemas">
<additionalLangIds>1003</additionalLangIds>
</additionalLanguages>
</BODY>
</HTML>
但我得到的是浏览器中的以下“警告和 XML 内容”而不是“1003”值
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<additionalLanguages xmlns="http://www.radisys.com/pcs/model/schemas">
<additionalLangIds>1003</additionalLangIds>
</additionalLanguages>
此输出未与客户期望映射，这导致客户端出现以下错误消息。
Execute action [repitition=0]: PUT -http://{SERVER}/PcsRESTApi/serviceproviders/1/accessNumbers/2020/languages
---HTTP RESPONSE---
HTTP Status: 500 - Internal Server Error
Response Headers:
Date=Sat, 07 Jul 2012 23:19:45 GMT
Server=Apache/2.2.16 (Unix) mod_jk/1.2.28
errorCode=unknown
errorMessage=Could not find acceptable representation
Accept-Charset=big5, big5-hkscs, compound_text, euc-jp, euc-kr, gb18030, gb2312, gbk, ibm-thai, ibm00858, ibm01140, ibm01141, ibm01142, ibm01143, ibm01144, ibm01145, ibm01146, ibm01147, ibm01148, ibm01149, ibm037, ibm1026, ibm1047, ibm273, ibm277, ibm278, ibm280, ibm284, ibm285, ibm297, ibm420, ibm424, ibm437, ibm500, ibm775, ibm850, ibm852, ibm855, ibm857, ibm860, ibm861, ibm862, ibm863, ibm864, ibm865, ibm866, ibm868, ibm869, ibm870, ibm871, ibm918, iso-2022-cn, iso-2022-jp, iso-2022-jp-2, iso-2022-kr, iso-8859-1, iso-8859-13, iso-8859-15, iso-8859-2, iso-8859-3, iso-8859-4, iso-8859-5, iso-8859-6, iso-8859-7, iso-8859-8, iso-8859-9, jis_x0201, jis_x0212-1990, koi8-r, koi8-u, shift_jis, tis-620, us-ascii, utf-16, utf-16be, utf-16le, utf-32, utf-32be, utf-32le, utf-8, windows-1250, windows-1251, windows-1252, windows-1253, windows-1254, windows-1255, windows-1256, windows-1257, windows-1258, windows-31j, x-big5-solaris, x-euc-jp-linux, x-euc-tw, x-eucjp-open, x-ibm1006, x-ibm1025, x-ibm1046, x-ibm1097, x-ibm1098, x-ibm1112, x-ibm1122, x-ibm1123, x-ibm1124, x-ibm1381, x-ibm1383, x-ibm33722, x-ibm737, x-ibm834, x-ibm856, x-ibm874, x-ibm875, x-ibm921, x-ibm922, x-ibm930, x-ibm933, x-ibm935, x-ibm937, x-ibm939, x-ibm942, x-ibm942c, x-ibm943, x-ibm943c, x-ibm948, x-ibm949, x-ibm949c, x-ibm950, x-ibm964, x-ibm970, x-iscii91, x-iso-2022-cn-cns, x-iso-2022-cn-gb, x-iso-8859-11, x-jis0208, x-jisautodetect, x-johab, x-macarabic, x-maccentraleurope, x-maccroatian, x-maccyrillic, x-macdingbat, x-macgreek, x-machebrew, x-maciceland, x-macroman, x-macromania, x-macsymbol, x-macthai, x-macturkish, x-macukraine, x-ms950-hkscs, x-mswin-936, x-pck, x-utf-16le-bom, x-utf-32be-bom, x-utf-32le-bom, x-windows-50220, x-windows-50221, x-windows-874, x-windows-949, x-windows-950, x-windows-iso2022jp
Content-Length=5243
Connection=close
Content-Type=application/xml
Response Body:
unknown: Could not find acceptable representation
org.springframework.web.HttpMediaTypeNotAcceptableException Could not find acceptable representation
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:954)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:898)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:847)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:423)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
我的问题是为什么输出不是一个值？为什么它是 XML？我在这里缺少什么。
请帮助我。我挣扎了很久。你是我唯一的希望。
解决
方法 仅当您直接从控制器返回值（对象）时才添加 @ResponseBody。如果您正在执行重定向网址；不要添加此注释。