java注解RequestParam报参数为空

根据提供的引用内容，可以看出在Java中使用@RequestParam注解来获取请求参数。如果@RequestParam注解的value属性与前台传递的参数名不一致，可以使用@RequestParam注解的name属性来指定参数名。

以下是两种处理@RequestParam参数为空的方法：

1. 默认情况下，使用@RequestParam注解的value属性来获取参数值。如果参数为空，可以通过设置@RequestParam注解的required属性为false来允许参数为空。示例代码如下：

@RequestMapping(value = "/xiaocui/info", method = RequestMethod.GET)
@ResponseBody
public void XiaoCuiInfoQuery(@RequestParam(required = false) String name, @RequestParam(required = false) Integer age, @RequestParam(required = false) String school) {
    System.out.println("name:" + name + ",age:" + age + ",school:" + school);
}

2. 如果@RequestParam注解的value属性与前台传递的参数名不一致，可以使用@RequestParam注解的name属性来指定参数名。示例代码如下：

@RequestMapping(value = "/xiaocui/info", method = RequestMethod.GET)
@ResponseBody
public void XiaoCuiInfoQuery(@RequestParam(name = "xiaocuiname") String name, @RequestParam(name = "xiaocuiage") Integer age, @RequestParam String school) {
    System.out.println("name:" + name + ",age:" + age + ",school:" + school);
}