@RequestParam注解的使用

自SpringMVC4.2之后，RequestParam内部有4个参数：

1、String name;

2、String value;

3、boolean required;

4、String defaultValue;

源码中name的别名是value，value的别名是name,

所以说name和value两个属性基本是等价的,都是获取从前台传入的参数






RequestParam来映射请求参数





 required表示是否必须,默认为true





 defaultValue请求参数的默认值






@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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巴特西

@RequestParam注解的使用

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