@RequestParam 注解

本文讲解@RequestParam 注解 的用法

demo

@GetMapping("/list")
public String test(@RequestParam int userId) {
    return "list";
}

讲解如下

1.@RequestParam(required = false)设置为非必传。因为required值默认是true，所以默认必传
2.@RequestParam("userId")或者@RequestParam(value = "userId")指定参数名。
3.@RequestParam(defaultValue = "0")指定参数默认值

用法如下

@GetMapping("/list")
public String test(@RequestParam(value = "userId", defaultValue = "0", required = false) int userId) {
    return "list";
}