http两种传参方式

1. ?传参

   举例:http://localhost:8082/news/asset/getDatas?page=1&keyWord=123&year=2020

   注解:@RequestParam

   使用:

   @RequestMapping("/getDatas")
   public String getDatas(@RequestParam("page") int page, @RequestParam("keyWord") String keyWord, @RequestParam("year") String year){
       return assetService.getDatas(page,keyWord,year);
   }
   

   注:@RequestParam可以选择request=false来允许初值为空,但这个值的类型必须为对象,不能为基本类型

2. Restful风格传参

   举例:http://localhost:8082/news/asset/getDatas/1/123/2020

   注解:@PathVariable

   使用:

   @RequestMapping("/getDatas/{page}/{keyWord}/{year}")
   public String getDatas(@PathVariable("page") int page,@PathVariable("keyWord") String keyWord,@PathVariable("year") String year){
       return assetService.getDatas(page,keyWord,year);
   }
   

   注:@PathVariable绑定的是@RequestMapping中的变量