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  • @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


    1. RequestParam来映射请求参数
    2. required表示是否必须,默认为true
    3. defaultValue请求参数的默认值

    1. @RequestMapping(value = "/testRequestParam")
    2. public String testRequestParam(@RequestParam(value="username")String un,@RequestParam(value = "age",required = false,defaultValue = "0") int age){
    3. System.out.println("testRequestParam,username:"+un+",age,"+age);
    4. return "success";
    5. }




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  • 原文地址:https://www.cnblogs.com/zhuhui-site/p/10088305.html
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