@PathVariable注解的功能是什么呢？

@pathVariable注解的功能

  @PathVariable注解简介:
     @PathVariable是spring3.0的一个新功能
     它用于接收请求路径中占位符的值

@PathVariable注解的功能

@PathVariable("xxx")
通过 @PathVariable 可以将URL中占位符参数{xxx}绑定到处理器类的方法形参中@PathVariable(“xxx“) 
 
@RequestMapping(value=”user/{id}/{name}”)
请求路径：http://localhost:8080/hello/test/1/maomao

package com.day01springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;
 
/**
 * @ Author     ：java265.com 
 */
@Controller
@RequestMapping("hello")
public class HelloController2 {
    /**
     *3、占位符映射
     * 语法：@RequestMapping(value=”user/{userId}/{userName}”)
     * 请求路径：http://localhost:8080/hello/test/1/maomao
     * @param ids
     * @param names
     * @return
     */
    @RequestMapping("test/{id}/{name}")
    public ModelAndView test5(@PathVariable("id") Long ids ,@PathVariable("name") String names){
        ModelAndView mv = new ModelAndView();
        mv.addObject("msg","占位符映射：id:"+ids+";name:"+names);
        mv.setViewName("tttttt");
        return mv;
    }
}