Spring MVC返回HTTP 406响应

时间:2015-01-25 11:39:08

标签: java spring rest spring-mvc web.xml

我想从控制器返回JSON响应。流程是这样的。

<dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.2-1003-jdbc4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.25</version>
        </dependency>     
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
                <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-webmvc</artifactId>
                        <version>4.1.0.RELEASE</version>
                </dependency>
                <dependency>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-core</artifactId>
                        <version>3.6.0.CR1</version>
               </dependency>
               <dependency>
                        <groupId>org.hibernate</groupId>
                        <artifactId>hibernate-entitymanager</artifactId>
                        <version>4.3.1.Final</version>
               </dependency>
               <dependency>
                        <groupId>junit</groupId>
                        <artifactId>junit</artifactId>
                        <version>4.4</version>
              </dependency>
              <dependency>
                        <groupId>org.codehaus.jackson</groupId>
                        <artifactId>jackson-mapper-asl</artifactId>
                        <version>1.8.5</version>
                        <scope>compile</scope>
              </dependency>
              <dependency>
                        <groupId>org.codehaus.jackson</groupId>
                        <artifactId>jackson-core-asl</artifactId>
                        <version>1.8.5</version>
                        <scope>compile</scope>
              </dependency>

是我的依赖树。

@XmlRootElement
public class ResponseUser {
    private String contact_id;
    private String user_key;

    public String getContact_id() {
        return contact_id;
    }

    public void setContact_id(String contact_id) {
        this.contact_id = contact_id;
    }

    public String getUser_key() {
        return user_key;
    }

    public void setUser_key(String user_key) {
        this.user_key = user_key;
    }

    public String toString()
    {
      return "Contact_id"+":"+this.contact_id +","+"User_key"+":"+this.user_key;
    }

}

是我的pojo课程。

@RequestMapping(value="/user",method=RequestMethod.POST,produces="application/json")
    public  @ResponseBody ResponseUser getUser(HttpServletRequest request,HttpServletResponse response)
    {
       ResponseUser user=new ResponseUser();
       user.setContact_id("sjlfjsld");
       user.setUser_key("skdjflsjdfl");
       System.out.println(user);
       return user;
    }

是我的控制员。

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <context:component-scan base-package="org.rwind.router" />

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/Views/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>
        <context:annotation-config />
        <mvc:annotation-driven>
  <mvc:message-converters>
    <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
  </mvc:message-converters>
</mvc:annotation-driven>

</beans>

是我的Dispactcher-servlet.xml

<web-app version="3.0"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="
    http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd"
         metadata-complete="false">

    <display-name>Softforge-api</display-name>

    <servlet>
        <servlet-name>api</servlet-name>
        <servlet-class>
                       org.springframework.web.servlet.DispatcherServlet
                </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>api</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/api-servlet.xml</param-value>
    </context-param>

    <listener>
        <listener-class>
             org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>


</web-app>

是我的web.xml文件。

我不知道我做错了什么。但我得到406错误。 伙计们请告诉我必须改变。

1 个答案:

答案 0 :(得分:1)

有几件事。

  1. 您正在混合使用hibernate的版本
  2. 你有杰克逊1(codehaus)作为依赖,但明确配置杰克逊2
  3. 您正在加载所有豆子两次。
  4. 配置改进
  5. 混合Hibernate版本

    <dependency>
         <groupId>org.hibernate</groupId>
         <artifactId>hibernate-core</artifactId>
         <version>3.6.0.CR1</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.3.1.Final</version>
    </dependency>
    

    在你的依赖列表中,你混合版本3.6.0.CR1(它甚至不是最终版本)和4.3.1.Final。混合框架的罐子从来都不是明智之举。您应该能够删除hibernate-core的依赖关系,因为hibernate-entitymanager依赖于<dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.3.1.Final</version> </dependency>

      <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.8.5</version>
            <scope>compile</scope>
      </dependency>
      <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-core-asl</artifactId>
            <version>1.8.5</version>
            <scope>compile</scope>
      </dependency>
    

    Jackson1作为依赖

    MappingJackson2HttpMessageConverter

    您在依赖关系列表中的依赖关系是针对Jackson 1的,但是您明确配置使用Jackson 2而非Jackson 1的<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.3.5</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.3.5</version> </dependency> 。修复此依赖关系

    MappingJackson2HttpMessageConverter

    您还可以删除<mvc:annotation-driven />的显式配置,因为在您使用<mvc:annotation-driven /> 时会自动添加该配置,这将为您节省几行配置。

    web.xml

    装豆两次

    在您的DispatcherServlet中,您定义了名为api的{​​{1}},默认情况下会加载/WEB-INF/api-servlet.xml。您将再次使用ContextLoaderListener加载此配置。这会复制所有bean并消耗额外的资源。现在,您可以删除ContextLoaderListener

    <?xml version="1.0" encoding="UTF-8"?> 
    <web-app
        version="3.0"
        xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    
        <display-name>Softforge-api</display-name>
    
        <servlet>
            <servlet-name>api</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <load-on-startup>1</load-on-startup>
        </servlet>
    
        <servlet-mapping>
            <servlet-name>api</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    
    </web-app>
    

    配置增强功能

    建议使用少版本的XSD文件而不是版本的文件。因此,使用spring-beans.xsd代替spring-beans-3.0.xsd,这将确保您始终使用最新的可用版本。

    <context:annotation-config />已隐含

    <context:component-scan />您可以删除它。

    MappingJackson2HttpMessageConverter在类路径上检测到Jackson2时由<mvc:annotation-driven />自动配置,您可以删除显式配置。

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    
        <context:component-scan base-package="org.rwind.router" />
        <mvc:annotation-driven />
    
        <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/Views/" />
            <property name="suffix" value=".jsp" />
        </bean>
    
    </beans>