问题
I am trying to make a RESTful service using Java, using several tutorials and many, MANY StackOverflow entries. Unfortunately I don't seem to be able to get my code to work, I am persistantly getting Http 406 when I try and hit the endpoint. Any help is appreciated.
GreetingController.java:
import java.util.Random;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/greeting")
public class GreetingController {
protected final Logger log = LoggerFactory.getLogger(GreetingController.class);
private static final String template = "Hello, %s!";
private static Random rand = new Random();
@RequestMapping(method = RequestMethod.GET, headers="Accept=*/*")//, value="/{name}")
@ResponseBody
public Greeting greeting() {
log.debug("Entered greeting()");
return new Greeting(rand.nextInt(99999999),
String.format(template, "Stephen"));
}
@RequestMapping(method = RequestMethod.GET, value="/{name}")
@ResponseBody
public Greeting greetingName(@PathVariable String name) {
log.debug("Entered greetingName()");
return new Greeting(rand.nextInt(99999999),
String.format(template, name));
}
}
Greeting.java:
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="greeting")
@XmlAccessorType(XmlAccessType.PUBLIC_MEMBER)
public class Greeting {
private Integer id;
private String content;
public Greeting() {
}
public Greeting(Integer id, String content) {
this.id = id;
this.content = content;
}
@XmlElement
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
@XmlElement
public void setContent(String content) {
this.content = content;
}
public String getContent() {
return content;
}
}
x-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:security="http://www.springframework.org/schema/security"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xmlns:mvc="http://www.springframework.org/schema/tx"
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/oxm http://www.springframework.org/schema/oxm/spring-oxm-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">
<context:component-scan base-package="com.package.name" />
<mvc:annotation-driven/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
Http headers (via firebug):
Response Headers
Content-Language en
Content-Length 1067
Content-Type text/html;charset=utf-8
Date Tue, 18 Feb 2014 20:24:13 GMT
Server Apache-Coyote/1.1
Request Headers
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Connection keep-alive
Cookie JSESSIONID=9064B3E9F1C3259B73C65B022C8BDC75
Host localhost:8080
User-Agent Mozilla/5.0 (Windows NT 6.0; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0
log when starting up tomcat and hitting the different pages on said server:
DEBUG o.s.security.web.FilterChainProxy - Converted URL to lowercase, from: '/greeting'; to: '/greeting'
DEBUG o.s.security.web.FilterChainProxy - Candidate is: '/greeting'; pattern is /**; matched=true
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 1 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.access.channel.ChannelProcessingFilter@9a6bbb'
DEBUG o.s.s.w.a.i.DefaultFilterInvocationSecurityMetadataSource - Converted URL to lowercase, from: '/greeting'; to: '/greeting'
DEBUG o.s.s.w.a.i.DefaultFilterInvocationSecurityMetadataSource - Candidate is: '/greeting'; pattern is /**; matched=true
DEBUG o.s.s.w.a.c.ChannelProcessingFilter - Request: FilterInvocation: URL: /greeting; ConfigAttributes: [ANY_CHANNEL]
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 2 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.context.SecurityContextPersistenceFilter@16fcc4'
DEBUG o.s.s.w.c.HttpSessionSecurityContextRepository - No HttpSession currently exists
DEBUG o.s.s.w.c.HttpSessionSecurityContextRepository - No SecurityContext was available from the HttpSession: null. A new one will be created.
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 3 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.authentication.logout.LogoutFilter@1db52c8'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 4 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@17d6c1'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 5 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@1144823'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 6 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.authentication.www.BasicAuthenticationFilter@8c02cc'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 7 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.savedrequest.RequestCacheAwareFilter@bbd1b'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 8 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@ac576f'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 9 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.authentication.AnonymousAuthenticationFilter@15daa9e'
DEBUG o.s.s.w.a.AnonymousAuthenticationFilter - Populated SecurityContextHolder with anonymous token: 'org.springframework.security.authentication.AnonymousAuthenticationToken@9055c2bc: Principal: anonymousUser; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@b364: RemoteIpAddress: 0:0:0:0:0:0:0:1; SessionId: null; Granted Authorities: ROLE_ANONYMOUS'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 10 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.session.SessionManagementFilter@6c9f0f'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 11 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.access.ExceptionTranslationFilter@13ec758'
DEBUG o.s.security.web.FilterChainProxy - /greeting at position 12 of 12 in additional filter chain; firing Filter: 'org.springframework.security.web.access.intercept.FilterSecurityInterceptor@917cb0'
DEBUG o.s.s.w.a.i.DefaultFilterInvocationSecurityMetadataSource - Converted URL to lowercase, from: '/greeting'; to: '/greeting'
DEBUG o.s.s.w.a.i.DefaultFilterInvocationSecurityMetadataSource - Candidate is: '/greeting'; pattern is /welcome*; matched=false
DEBUG o.s.s.w.a.i.DefaultFilterInvocationSecurityMetadataSource - Candidate is: '/greeting'; pattern is /**; matched=true
DEBUG o.s.s.w.a.i.FilterSecurityInterceptor - Secure object: FilterInvocation: URL: /greeting; Attributes: [IS_AUTHENTICATED_ANONYMOUSLY]
DEBUG o.s.s.w.a.i.FilterSecurityInterceptor - Previously Authenticated: org.springframework.security.authentication.AnonymousAuthenticationToken@9055c2bc: Principal: anonymousUser; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@b364: RemoteIpAddress: 0:0:0:0:0:0:0:1; SessionId: null; Granted Authorities: ROLE_ANONYMOUS
DEBUG o.s.s.access.vote.AffirmativeBased - Voter: org.springframework.security.access.vote.RoleVoter@1913751, returned: 0
DEBUG o.s.s.access.vote.AffirmativeBased - Voter: org.springframework.security.access.vote.AuthenticatedVoter@c6b80e, returned: 1
DEBUG o.s.s.w.a.i.FilterSecurityInterceptor - Authorization successful
DEBUG o.s.s.w.a.i.FilterSecurityInterceptor - RunAsManager did not change Authentication object
DEBUG o.s.security.web.FilterChainProxy - /greeting reached end of additional filter chain; proceeding with original chain
DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'spring-tutorial' determining Last-Modified value for [/SpringMVC/greeting]
DEBUG o.s.w.s.m.a.DefaultAnnotationHandlerMapping - Mapping [/greeting] to handler 'com.example.controller.GreetingController@1eb1db2'
DEBUG o.s.web.servlet.DispatcherServlet - Last-Modified value for [/SpringMVC/greeting] is: -1
DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'spring-tutorial' processing GET request for [/SpringMVC/greeting]
DEBUG o.s.w.b.a.s.HandlerMethodInvoker - Invoking request handler method: public com.example.form.Greeting com.example.controller.GreetingController.greeting()
INFO c.s.controller.GreetingController - Entered greeting()
DEBUG o.s.w.s.m.a.AnnotationMethodHandlerExceptionResolver - Resolving exception from handler [com.example.controller.GreetingController@1eb1db2]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
DEBUG o.s.w.s.m.a.ResponseStatusExceptionResolver - Resolving exception from handler [com.example.controller.GreetingController@1eb1db2]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
DEBUG o.s.w.s.m.s.DefaultHandlerExceptionResolver - Resolving exception from handler [com.example.controller.GreetingController@1eb1db2]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
DEBUG o.s.s.w.c.HttpSessionSecurityContextRepository - SecurityContext contents are anonymous - context will not be stored in HttpSession.
DEBUG o.s.web.servlet.DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'spring-tutorial': assuming HandlerAdapter completed request handling
DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request
DEBUG o.s.s.w.a.ExceptionTranslationFilter - Chain processed normally
DEBUG o.s.s.w.c.SecurityContextPersistenceFilter - SecurityContextHolder now cleared, as request processing completed
回答1:
I just came across this when trying to troubleshoot the same issue. After looking at pfac's answer, I discovered I could solve my issue simply by adding the jackson-dataformat-xml library to my project.
If using maven:
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.3.2</version>
</dependency>
回答2:
Just spent some hours chasing this, so I'm leaving here what worked for me (I'm using Spring 4.0.6) and what I believe will work for you (Spring 3.0.x).
Spring 4.0.x
Since MappingJackson2HttpMessageConverter picks up the Jackson data binding library automatically and enables controller methods annotated with @ResponseBody to automatically return JSON, one usually assumes that such a tool also exists for XML, but this is not the case.
In order to enable XML I had to manually create a RequestMappingHandlerAdapter with two message converters, a MarshallingHttpMessageConverter followed by a MappingJackson2HttpMessageConverter.
This also allows to use any of the marshallers provided by Spring, just by setting it as a property of MarshallingHttpMessageConverter.
Resulting spring-servlet.xml:
<?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:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- ... -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
<property name="marshaller">
<bean class="org.springframework.oxm.xstream.XStreamMarshaller"></bean>
</property>
</bean>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
</list>
</property>
</bean>
<!-- ... -->
</beans>
Spring 3.0.x
NOTE: I'm assuming this version from the schema locations in your x-servlet.xml.
According to http://spring.io/blog/2013/05/11/content-negotiation-using-spring-mvc and http://spring.io/blog/2013/06/03/content-negotiation-using-views/, there are two ways to achieve what you want in Spring 3. The first one is using a ContentNegotiationManager, which is only available since versions 3.2.x and therefore is unavailable for your version. The second one is using a ContentNegotiatingViewResolver, which delegates the resolution of the views to other resolvers based on the content type requested (whether this is defined by the Accept header, by extension, or by default is configurable).
Basically you need to configure a ContentNegotiatingViewResolver with two resolvers, one for XML and another for your JSP views.
spring-servlet.xml:
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="viewResolvers">
<list>
<bean class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="location" value="spreadsheet-views.xml"/>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="WEB-INF/views"/>
<property name="suffix" value=".jsp"/>
</bean>
</list>
</property>
</bean>
You can add a view resolver for JSON for example, but you will have to implement it since Spring does not provide one. The second blog post shows how to implement a simple one.
回答3:
406 means the request content is considered Not Acceptable by the server. Try to remove the Accept header or adding headers="Accept=*/*" to the @RequestMapping annotations.
回答4:
I was struggling with a similar problem. It appeared that for some reason my web app was not providing xml data type by default, even despite I was setting "produces=application/xml" parameter in annotations.
I only solved it by adding extra bean configuration for my applicationContext.xml:
<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="defaultContentType" value="application/xml" />
</bean>
<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" />
or via Java Config class:
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
configurer.defaultContentType(MediaType.APPLICATION_XML);
}
}
来源：https://stackoverflow.com/questions/21865179/spring-xml-406-error