在spring MVC中,兩者的作用都是將request裏的參數的值綁定到contorl裏的方法參數裏的,區別在於,URL寫法不同。
使用@RequestParam時,URL是這樣的:http://host:port/path?參數名=參數值
使用@PathVariable時,URL是這樣的:http://host:port/path/參數值
例如:
@RequestMapping(value="/user",method = RequestMethod.GET)
public @ResponseBody
User printUser(@RequestParam(value = "id", required = false, defaultValue = "0")
int id) {
User user = new User();
user = userService.getUserById(id);
return user;
}
@RequestMapping(value="/user/{id:\\d+}",method = RequestMethod.GET)
public @ResponseBody
User printUser2(@PathVariable int id) {
User user = new User();
user = userService.getUserById(id);
return user;
}
上面兩個方法,訪問路徑分別如下: