The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers
http://blog.youkuaiyun.com/gbtyy/article/details/17165605
Spring 3.2.x通过@ResponseBody标签返回JSON数据的方法都报406错:Failed to load resource: the server responded with a status of 406 (Not Acceptable)以及报错描述:The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ()于是,百度、Google了半天,发现遇到此问题的人挺多的,但是都是说什么添加Jackson什么的,我是采用的fastjson,换成Jackson尝试了半天均还是406。后来在stackoverflow有人说是Spring 3.2的BUG,于是退回到3.1.*,不再报406了,虽然换回3.1不报错了,但还是想看看在处理ajax返回json数据的方式上两个版本到底有何区别,debug之。 debug到org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(T returnValue,MethodParameter returnType,ServletServerHttpRequest inputMessage,ServletServerHttpResponse outputMessage),在以下代码处抛出了异常:
- if(compatibleMediaTypes.isEmpty()){
- thrownewHttpMediaTypeNotAcceptableException(allSupportedMediaTypes);
- }
看来是compatibleMediaTypes为空导致。看debug信息,经过比较发现3.1的requestedMediaTypes为[*/*],而3.2的requestedMediaTypes却为[text/html],producibleMediaTypes都是[application/json],继而发现获取acceptableMediaTypes的方式3.1与3.2不同 3.1的
3.1的
- privateList<MediaType>getAcceptableMediaTypes(HttpInputMessageinputMessage){
- try{
- List<MediaType>result=inputMessage.getHeaders().getAccept();
- returnresult.isEmpty()?Collections.singletonList(MediaType.ALL):result;
- }catch(IllegalArgumentExceptionex){
- if(logger.isDebugEnabled()){
- logger.debug("CouldnotparseAcceptheader:"+ex.getMessage());
- }
- returnCollections.emptyList();
- }
- }
- privateList<MediaType>getAcceptableMediaTypes(HttpServletRequestrequest)throwsHttpMediaTypeNotAcceptableException{
- List<MediaType>mediaTypes=this.contentNegotiationManager.resolveMediaTypes(newServletWebRequest(request));
- returnmediaTypes.isEmpty()?Collections.singletonList(MediaType.ALL):mediaTypes;
- }
解决方案一、第一种继续用Spring 3.1.4。
解决方案1.1:http://lucky-xingxing.iteye.com/blog/1666834
苦苦研究了两天,之前对于这个问题,The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ()。在网上苦寻答案无果,都说是缺少jackson-core-asl和jackson-mapper-asl两jar包,但是我已经添加了,而且版本从1.0.1到1.9.1都试过了,全无效果。前提配置文件以及action里面改写的全都正确。今天终于在一个外文网站找到答案,是由于spring版本的问题引起的。我之前一直用的是3.0.0的版本。就是因为这个版本的问题。于是果断去官网下载3.1.1版本的,然后jar替换,一切正常运行,成功返回json数据。
二、第二种
- <?xmlversion="1.0"encoding="UTF-8"?>
- <beansxmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"
- xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"
- xmlns:mvc="http://www.springframework.org/schema/mvc"
- xsi:schemaLocation="http://www.springframework.org/schema/beans
- http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
- http://www.springframework.org/schema/context
- http://www.springframework.org/schema/context/spring-context-3.0.xsd
- http://www.springframework.org/schema/aop
- http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
- http://www.springframework.org/schema/tx
- http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
- http://www.springframework.org/schema/mvc
- http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
把spring-mvc-3.0.xsd 升级到spring-mvc-3.2.xsd
- <?xmlversion="1.0"encoding="UTF-8"?>
- <beansxmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"
- xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"
- xmlns:mvc="http://www.springframework.org/schema/mvc"
- xsi:schemaLocation="http://www.springframework.org/schema/beans
- http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
- http://www.springframework.org/schema/context
- http://www.springframework.org/schema/context/spring-context-3.0.xsd
- http://www.springframework.org/schema/aop
- http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
- http://www.springframework.org/schema/tx
- http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
- http://www.springframework.org/schema/mvc
- http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
然后把<mvc:annotation-driven>修改成如下格式
- <mvc:annotation-drivencontent-negotiation-manager="contentNegotiationManager"/>
- <beanid="contentNegotiationManager"class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
- <propertyname="favorPathExtension"value="false"/>
- <propertyname="favorParameter"value="false"/>
- <propertyname="ignoreAcceptHeader"value="false"/>
- <propertyname="mediaTypes">
- <value>
- atom=application/atom+xml
- html=text/html
- json=application/json
- *=*/*
- </value>
- </property>
- </bean>
详情见下面的地址点击打开链接
四、第四种
spring 3.2时requestedMediaTypes却为[text/html]的情况报406错误,还有一个原因可能是由于采用的后缀有关,如果使用*.htm,*.html等,默认就会采用[text/html]编码,若改成*.json,*.shtml等就OK
eg:http://192.168.1.15:8080/tvportal/mobile/program/programsByChannel?channelId=102
改成:http://192.168.1.15:8080/tvportal/mobile/program/programsByChannel.json?channelId=102
综上,第四种方式最优。