ZollltyMVC
(A Java MVC framework)
zollty-tmpl.js
(A JS Template Engine)
Jretty-log
(A logging library for Java)
Jretty-core
(A simple Java util's library)
Kafka-xclient
(A third-part kafka-clients)
SpringMVC异常报406 (Not Acceptable)的解决办法
异常信息如下
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
因为在RequestMapping里面加上了
produces=MediaType.APPLICATION_JSON_VALUE
分析如下：
参见：
https://www.cnblogs.com/wuxun1997/p/7729175.html
匹配逻辑：ProducesRequestCondition类185行
public ProducesRequestCondition getMatchingCondition(HttpServletRequest request) {
if (isEmpty()) {
return this;
Set<ProduceMediaTypeExpression> result = new LinkedHashSet<ProduceMediaTypeExpression>(expressions);
for (Iterator<ProduceMediaTypeExpression> iterator = result.iterator(); iterator.hasNext();) {
ProduceMediaTypeExpression expression = iterator.next();
if (!expression.match(request)) {
iterator.remove();
return (result.isEmpty()) ? null : new ProducesRequestCondition(result, this.contentNegotiationManager);
}
解析请求Content-Type在这里，AbstractMappingContentNegotiationStrategy类
public List<MediaType> resolveMediaTypes(NativeWebRequest webRequest)
throws HttpMediaTypeNotAcceptableException {
return resolveMediaTypeKey(webRequest, getMediaTypeKey(webRequest));
* An alternative to {@link #resolveMediaTypes(NativeWebRequest)} that accepts
* an already extracted key.
* @since 3.2.16
public List<MediaType> resolveMediaTypeKey(NativeWebRequest webRequest, String key)
throws HttpMediaTypeNotAcceptableException {
if (StringUtils.hasText(key)) {
MediaType mediaType = lookupMediaType(key);
if (mediaType != null) {
handleMatch(key, mediaType);
return Collections.singletonList(mediaType);
mediaType = handleNoMatch(webRequest, key);
if (mediaType != null) {
addMapping(key, mediaType);
return Collections.singletonList(mediaType);
return Collections.emptyList();
}
例如 URI 为
http://x.x.x.x/api/email/alice@gmail.com
则上面方法解析出来的 key 为"com"， mediaType = "application/x-msdownload"
这显然是错的。
解决方法（来源于stackoverflow）
参见：
https://stackoverflow.com/questions/45189189/spring-rest-request-406-not-acceptable-for-123?r=SearchResults
https://stackoverflow.com/questions/16332092/spring-mvc-pathvariable-with-dot-is-getting-truncated#
我试了很多都不行，总结一下，就是配置下面的两处
<bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="favorPathExtension" value="false" />
<property name="favorParameter" value="true" />
<property name="mediaTypes">
<value>
json=application/json
xml=application/xml
</value>
</property>
</bean>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager">
<mvc:path-matching suffix-pattern="false" registered-suffixes-only="true" />
</mvc:annotation-driven>
一定要配置 contentNegotiationManager 和 registered-suffixes-only才行，当然也可以在Java代码里配置。
关于这个问题，我认真分析后，给Spring 社区提了一个issue，后续参见：
https://github.com/spring-projects/spring-framework/issues/22623
