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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()) {
- throw new HttpMediaTypeNotAcceptableException(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
- private List<MediaType> getAcceptableMediaTypes(HttpInputMessage inputMessage) {
- try {
- List<MediaType> result = inputMessage.getHeaders().getAccept();
- return result.isEmpty() ? Collections.singletonList(MediaType.ALL) : result;
- } catch (IllegalArgumentException ex) {
- if (logger.isDebugEnabled()) {
- logger.debug("Could not parse Accept header: " + ex.getMessage());
- }
- return Collections.emptyList();
- }
- }
3.2的
- private List<MediaType> getAcceptableMediaTypes(HttpServletRequest request) throws HttpMediaTypeNotAcceptableException {
- List<MediaType> mediaTypes = this.contentNegotiationManager.resolveMediaTypes(new ServletWebRequest(request));
- return mediaTypes.isEmpty() ? Collections.singletonList(MediaType.ALL) : mediaTypes;
- }
看来问题就是出在这里了。不知Spring为何改变该实现方式？？！！
解决方法如下：
一、第一种 继续用Spring 3.1.4。
二、第二种
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="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
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="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-driven content-negotiation-manager="contentNegotiationManager" />
- <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
- <property name="favorPathExtension" value="false" />
- <property name="favorParameter" value="false" />
- <property name="ignoreAcceptHeader" value="false" />
- <property name="mediaTypes" >
- <value>
- atom=application/atom+xml
- html=text/html
- json=application/json
- *=*/*
- </value>
- </property>
- </bean>
三、第三种
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
文章来源：http://blog.csdn.net/gbtyy/article/details/17165605
Spring 3.2.* MVC通过Ajax获取JSON数据报406错误
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原文地址：http://www.cnblogs.com/hhang/p/4286576.html
