根据请求网址自动选择viewResolver？ [英] automatically choose viewResolver based on request url?

问题描述

我希望能够做的是编写一个返回对象的方法，将方法映射到请求，并根据url更改对象的格式。因此，如果我有一个客户端对象数组被返回 / clients ，我希望默认情况下将对象解析为速度模板（clients.vm） ）处理格式。但是，如果url是 /clients.json ，那么我想将对象传回响应主体，并让消息转换器弄清楚如何处理它。

What I'd like to be able to do is write one method that will return an object, map the method to a request, and alter how the object is formatted based on the url. So, if I had an array of Client objects that get returned for /clients, I'd like to, by default, resolve the object to a velocity template (clients.vm) to handle the formatting. However, if the url is /clients.json, than I'd like to pass the object back in the response body, and let the message converter figure out how to handle it.

所以，我的问题是，如何配置Spring，以及如何编写控制器？

So, my question is, how do I configure Spring, and how do I write the controller?

Thx

推荐答案

在处理程序方法中使用 PathVariable ，使用它切换要使用的视图：

Use a PathVariable in your handler method, use that to toggle which view to use:

@RequestMapping("/myapp/{viewtype}/view.do")
public String myHandler(
      @PathVariable String viewtype,
      Model model) {
  // do stuff
  return "viewname." + viewtype;
}

查看类型可以是 vm ，或 jsp ，或者其他什么。如果返回类型只是更改为 @ResponseBody ，并且你在类路径上有Jackson JAR，它也可以返回JSON。

View type could be vm, or jsp, or whatever. It could also return JSON if the return type is simply changed to @ResponseBody and you have the Jackson JARs on the classpath.

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