SpringMVC注解@RequestParam全面解析

@RequestMapping("testRequestParam")
public String filesUpload(@RequestParam String inputStr, HttpServletRequest request) {
System.out.println(inputStr);

int inputInt = Integer.valueOf(request.getParameter("inputInt"));
System.out.println(inputInt);

// ......省略
return "index";
}

<form action="/gadget/testRequestParam" method="post">
参数inputStr:<input type="text" name="inputStr">
参数intputInt:<input type="text" name="inputInt">
</form>

@RequestParam String inputStr
// 下面的对传入参数指定为aa，如果前端不传aa参数名，会报错
@RequestParam(value="aa") String inputStr

// required=false表示不传的话，会给参数赋值为null，required=true就是必须要有
@RequestMapping("testRequestParam")
public String filesUpload(@RequestParam(value="aa", required=true) String inputStr, HttpServletRequest request)

@RequestMapping("testRequestParam")
public String filesUpload(@RequestParam(value="aa", required=true) String inputStr,
@RequestParam(value="inputInt", required=false) int inputInt
,HttpServletRequest request) {

// ......省略
return "index";
}