Spring 的 Json 没有得到适当的响应解决 [英] Spring's Json not being resolved with appropriate response

问题描述

我试图让 Spring 中的控制器使用 Jackson 类作为 推荐使用 3.0.当然，我的类路径中有 jackson jar 文件(jackson-core-asl-1.5.5.jar & jackson-mapper-asl-1.5.5.jar).

I've tried to have a controller in Spring return a JSON response to no avail using the Jackson classes as recommended with 3.0. I've got the jackson jar files(jackson-core-asl-1.5.5.jar & jackson-mapper-asl-1.5.5.jar) in my class path of course.

至于 appconfig.xml 条目，我不确定我是否需要这些.在返回 ol'fashion non-json ajax 之前，我已经把它们放在那里作为最后的绝望行为.

As for the appconfig.xml entries, I'm not sure I need these. I've put them in there as a last act of desperation before returning to ol' fashion non-json ajax.

在调试中，我看到控制器收到请求，返回 foo，然后在 firebug 中得到 406.

In debug, I watch the controller get the request, return the foo and then, in firebug, get a 406.

错误信息如下:设置为调试时从记录器:org.springframework.web.HttpMediaTypeNotAcceptableException:找不到可接受的表示

The error messages are as follows: From the logger when set to debug: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation

来自回复:(406) 此请求标识的资源只能根据请求接受"头()生成具有不可接受特征的响应.

From the response: (406) The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().

我的 appconfig.xml 在这里:

My appconfig.xml is here:

    <!-- Configures support for @Controllers -->
    <mvc:annotation-driven />

    <!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory -->
    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="mediaTypes">
    <map>
      <entry key="html" value="text/html"/>
      <entry key="json" value="application/json"/>
    </map>
  </property>
  <property name="viewResolvers">
    <list>
      <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
      </bean>
    </list>
  </property>
  <property name="defaultViews">
    <list>
      <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
    </list>
  </property>
</bean>
    <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename" value="messages"></property>
    </bean>

我的控制器

@RequestMapping(value="foo/bar", method=RequestMethod.GET)
public @ResponseBody foo getFoo(@RequestParam String fooId) {
    return new foo(fooId); 
}

在进行ajax调用的jsp上:

On the jsp, where the ajax call is made:

function addRow() {
  $.getJSON("foo/bar", {
    fooId: 1
  }, function(data) {
    alert("it worked.");
  });
}

如果需要更多信息，请告诉我.

Let me know if there's any more info that is needed.

推荐答案

摆脱所有 Jackson bean 以及协商解析器中的 json 映射.mvc:annotation-driven 应该配置 Jackson 序列化工作所需的一切.

Get rid of all Jackson beans, and of the json mapping in the negotiating resolver. the mvc:annotation-driven should configure everything you need for the Jackson serialization to work.

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