在Spring 3.0 GET请求中,@ PathVariable和@RequestParam之间的区别是什么

Question

在如下例子中,a @PathVariable和a 之间有什么区别@RequestParam？

@RequestMapping(value = "/portfolio/{portfolioIdPath}", method = RequestMethod.GET)
public final String portfolio(HttpServletRequest request, ModelMap model, 
@PathVariable long portfolioIdPath, @RequestParam long portfolioIdRequest)

Answer 1

@RequestParam将请求参数绑定到方法中的参数.在您的示例中,GET请求中名为"portfolioIdRequest"的参数的值将作为"portfolioIdRequest"参数传递给您的方法.一个更具体的例子 - 如果请求URL是

http://hostname/portfolio/123?portfolioIdRequest=456

那么参数"portfolioIdRequest"的值将是"456".

更多信息:http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestparam

类似地,@ PathVariable将URI模板变量"portfolioIdPath"的值绑定到方法参数"portfolioIdPath".例如,如果您的URI是

/portfolio/123

那么"portfolioIdPath"方法参数的值将是"123".

更多信息:http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestmapping-uri-templates