@RequestParam使用defaultValue属性设置默认值
注意设置必须是string类型的，框架自己会做转换
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@RequestParam (value = "page" , required = false , defaultValue = "1" ) Integer page, @RequestParam (value = "size" , required = false ) Integer size, |
补充：@RequestParam注解的使用说明
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
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@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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以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。
原文链接：https://blog.csdn.net/y41992910/article/details/88314233
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