使用@RequestParam还是@PathVariable？(Use @RequestParam or @PathVariable?)

 我正在使用spring框架开发REST WebApp，现在我想知道接收数据的最佳实践。 最好用@RequestParam或@PathVariable检索它们？显然我有兴趣接收像userid或username这样的简单数据。 使用示例： 
 
@RequestMapping(value = "/getdata", method = RequestMethod.GET)
public String GetData(@RequestParam(value = "memberId", required = true) Integer memberId){
  //return data for user with Id = memberid;
}
 
 要么 
 
@RequestMapping(value = "/getdata/{memberid}", method = RequestMethod.GET)
public String GetData(@pathvariable int memberid){
  //return data for user with Id = memberid;
}
 
 我对REST Web服务感兴趣 

I' m developing a REST WebApp with spring framework, now i'd like to know the best practice to receive data. It s best to retrieve them with @RequestParam or @PathVariable?Obviously i'm interested in receiving simple data like an userid or an username. Using an example:
 
@RequestMapping(value = "/getdata", method = RequestMethod.GET)
public String GetData(@RequestParam(value = "memberId", required = true) Integer memberId){
  //return data for user with Id = memberid;
}
 
or
 
@RequestMapping(value = "/getdata/{memberid}", method = RequestMethod.GET)
public String GetData(@pathvariable int memberid){
  //return data for user with Id = memberid;
}
 
I'm interested about REST web services

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