【发布时间】：2013-04-26 11:32:02
【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
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。我正在使用 Spring 3.2.2 和 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。
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;
}
}
我已经尝试添加了
<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。
【问题讨论】：
-
完成那里写的内容后，我不再收到 406 错误，但我也没有收到 JSON 响应。事实上，我没有得到任何回应。服务器返回空文档，状态为 200。