@RequestParam(value = "page", required = false, defaultValue = "1") Integer page,
@RequestParam(value = "size", required = false) Integer size,

@RequestMapping(value = "/testRequestParam")
 public String testRequestParam(@RequestParam(value="username")String un,@RequestParam(value = "age",required = false,defaultValue = "0") int age){
  System.out.println("testRequestParam,username:"+un+",age,"+age);
  return "success";
 }

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