Spring MVC + JSON = 406 不可接受 [英] Spring MVC + JSON = 406 Not Acceptable

问题描述

我正在尝试生成一个简单的 JSON 响应.现在我收到 406 Not Acceptable 错误.Tomcat 说此请求标识的资源只能生成具有根据请求接受"标头不可接受的特征的响应.即使我的 Accept 标头是

I'm trying to generate a simple JSON response working. Right now I get 406 Not Acceptable error. Tomcat says "The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers." even though my Accept headers are

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

在 tomcat/lib 中，我有所有 Tomcat jar、Spring jar 和 jackson-all-1.9.0.jar.我在 Tomcat 7 中使用 Spring 3.2.2.

In tomcat/lib I have all Tomcat jars, Spring jars and jackson-all-1.9.0.jar. I'm using Spring 3.2.2 with Tomcat 7.

我知道这个问题已经讨论过很多次了，但没有一个解决方案适合我.

I'm aware that this issue has been discussed many times, but none of solutions is working for me.

web.xml

<web-app id="WebApp_ID" version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <display-name>Spring Web MVC Application</display-name>

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

  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
  </servlet-mapping>

</web-app>

dispatcher-servlet.xml

<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-2.5.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">

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
        <property name="prefix">
            <value>/WEB-INF/pages/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>
 <context:component-scan base-package="com.smiechmateusz.controller" />
 <context:annotation-config />

    <mvc:annotation-driven />

</beans>

HelloWorldController.java

package com.smiechmateusz.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import com.smiechmateusz.dao.Foo;

@Controller
@RequestMapping("/")
public class HelloWorldController extends AbstractController{

    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request,
        HttpServletResponse response) throws Exception {

        ModelAndView model = new ModelAndView("HelloWorldPage");
        return model;
    }

    @RequestMapping(value="foobar.htm", method = RequestMethod.GET)
    public @ResponseBody Foo getShopInJSON() {
        Foo f = new Foo();
        f.setX(1);
        f.setY(2);
        f.setDescription("desc");
        return f;
    }
}

Foo.java

package com.smiechmateusz.dao;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="foobaz")
public class Foo implements Serializable
{
    private int x, y;
    String description;
    int id;

    @Column(name = "x")
    public int getX() {
        return x;
    }
    public void setX(int x) {
        this.x = x;
    }
    @Column(name = "y")
    public int getY() {
        return y;
    }
    public void setY(int y) {
        this.y = y;
    }
    @Column(name = "description")
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }

    @Id @GeneratedValue
    @Column(name = "id")
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
}

我已经尝试添加

<bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
          <list>
            <ref bean="jsonConverter"/>
          </list>
    </property>
</bean>

到我的 dispatcher-servlet.xml 或将 jakcson-all 更改为 jackson-asl 和 jackson-core-asl 但输出是一样的.

to my dispatcher-servlet.xml or changing jakcson-all to jackson-asl and jackson-core-asl but output was the same.

推荐答案

接受:text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8

这应该是问题所在.JSON 作为 application/json 提供.如果您相应地设置 Accept 标头，您应该会得到正确的响应.(有浏览器插件可以让你设置标题，我最喜欢 Firefox 的海报")

That should be the problem. JSON is served as application/json. If you set the Accept header accordingly, you should get the proper response. (There are browser plugins that let you set headers, I like "Poster" for Firefox best)

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