SpringMvc中获取 PathVariable的值的方式

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一、地址：**/{id}

@RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
public void del(HttpServletRequest request, @PathVariable("id") Long id){
   System.out.println(id);
}

二、方式

1、直接通过@PathVariable注解获取

@RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
    public void del(HttpServletRequest request, @PathVariable("id") Long id){
       System.out.println(id);
    }

2、通用@PathVariable注解批量获取, 只有注解的参数才能得到

@RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
   public void del(HttpServletRequest request, @PathVariable("id") Long id){
        NativeWebRequest webRequest = new ServletWebRequest(request);
        Map<String, Object> map = (Map<String, Object>) webRequest.getAttribute(View.PATH_VARIABLES, RequestAttributes.SCOPE_REQUEST);
        System.out.println(map.get("id"));
  }

3、批量获取，不需要任何注解

@RequestMapping(value = "/del/{id}", method = RequestMethod.GET)
  public void del(HttpServletRequest request){
       NativeWebRequest webRequest = new ServletWebRequest(request);
       Map<String, String> map = (Map<String, String>) webRequest.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST);
       System.out.println(map.get("id"));
  }

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原文链接：https://blog.csdn.net/u011110968/article/details/80229018

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