支持Spring-MVC控制器中的多种内容类型 [英] Supporting multiple content types in a Spring-MVC controller

问题描述

Rails控制器可以很容易地支持多种内容类型。

A Rails controller makes it very easy to support multiple content types.

respond_to do |format|
  format.js { render :json => @obj }
  format.xml
  format.html
end

美丽。在一个控制器动作中，我可以轻松地响应多种内容类型，并且具有足够的灵活性，可以呈现我想呈现的内容，无论是模板，对象的序列化形式等等。

Beautiful. In one controller action I can easily respond to multiple content types with plenty of flexibility as to what I wish to render, be it a template, a serialized form of my object, etc.

我可以在Spring-MVC中做类似的事情吗？在Spring中支持多种内容类型的标准是什么？我见过涉及视图解析器的解决方案，但这看起来很难管理，特别是如果我想支持除xhtml和xml之外的JSON。

Can I do something similar to this in Spring-MVC? What is the standard for supporting multiple content types in Spring? I've seen solutions involving view resolvers, but this looks difficult to manage, especially if I want to support JSON in addition to xhtml and xml.

任何建议都表示赞赏，但更简单，更优雅的解决方案将更受欢迎;）

Any suggestions are appreciated, but the simpler and more elegant solutions will be appreciated more ;)

编辑

如果我断言视图解析器难以管理，请随时纠正我并提供示例。最好能返回xml，xhtml和JSON。

If I'm incorrect in asserting that a view resolver is difficult to manage, please feel free to correct me and provide an example. Preferably one that can return xml, xhtml, and JSON.

推荐答案

在Spring 3中，你想要使用 org.springframework.web.servlet.view.ContentNegotiatingViewResolver 。

In Spring 3, you want to use the org.springframework.web.servlet.view.ContentNegotiatingViewResolver.

它需要一个媒体类型列表和 ViewResolvers 。来自 Spring docs ：

It takes a list of media type and ViewResolvers. From the Spring docs:

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="mediaTypes">
    <map>
      <entry key="atom" value="application/atom+xml"/>
      <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.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <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="content" class="com.springsource.samples.rest.SampleContentAtomView"/>

财务总监：

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class BlogsController {

    @RequestMapping("/blogs")
    public String index(ModelMap model) {
        model.addAttribute("blog", new Blog("foobar"));
        return "blogs/index";
    }    
}

您还需要加入Jackson JSON罐子。

You'll also need to include the Jackson JSON jars.

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