java - SpringMVC错误: The resource identified by this request is only capable of generating responses

Question

当我在浏览器中调用此 URL 时:

http://localhost:8080/app/foo.json

Spring 在以下错误消息中响应 406 状态代码:

The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().

但是我已经定义了我的内容协商 View 解析器，如下所示:

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="favorPathExtension" value="true" />
    <property name="ignoreAcceptHeader" value="true" />

    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json"/>
            <entry key="html" value="text/html"/>
        </map>
    </property>
</bean>

我的 Controller 定义如下:

@Controller
@RequestMapping(value = "/foo")
public class ToowootController {

    @RequestMapping(method = GET)
    @ResponseBody
    public FooDTO index() {
        // return fooDTO
    }

}

有什么想法我做错了什么吗？

Answer 1

看起来问题是我没有添加所有必要的依赖项，在本例中是jackson-mapper-asl。我认为只添加 jackson-core-asl 就足够了。