RESTful架构与SpringMVC框架的结合使用以及PUT、DELETE

来源：互联网发布：mathematica mac 编辑：程序博客网时间：2024/06/13 14:17

步骤：

在web.xml文件配置过滤器HiddenHttpMethodFilter
在controller中设置与调用

详细讲解：

配置过滤器HiddenHttpMethodFilter

    <filter>  <filter-name>methodFilter</filter-name>  <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    </filter>    <filter-mapping>    <filter-name>methodFilter</filter-name>  <url-pattern>/*</url-pattern>    </filter-mapping>

关注源码中的doFilterInternal

protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)throws ServletException, IOException {HttpServletRequest requestToUse = request;if ("POST".equals(request.getMethod()) && request.getAttribute(WebUtils.ERROR_EXCEPTION_ATTRIBUTE) == null) {String paramValue = request.getParameter(this.methodParam);if (StringUtils.hasLength(paramValue)) {requestToUse = new HttpMethodRequestWrapper(request, paramValue);}}filterChain.doFilter(requestToUse, response);}

里面高亮的代码就是获取请求方式，默认是get

而这个methodParam就是通过前端参数传过来的值来判断PUT、DELETE的

以下是前端页面表格中_method的值，对应的是DELETE

<form action="springmvc/testRest/1" method="post"><input type="hidden" name="_method" value="DELETE"><input type="submit" value="restDelete"></form>

在SpringMVC中调用

@Controller@RequestMapping("/springmvc")public class Hello {private static final String SUCCESS = "success";/** * 最终的视图: * prefix+returnValue+suffix * /WEB-INF/views/success.jsp *//** * https://www.douyu.com/485503 restful风格 * {roomId}占位符 * 两种命名情况 * 1.参数的名字和占位符的名字保持一致 * 2.@PathVariable中的名字和占位符中的名字一致，参数的名字就任意 * @return *//** *  /testRest    POST  新增 * /testRest/1   GET 获取 * /testRest/1   PUT 更新 * /testRest/1   DELETE 删除 *  * @param id * @return */@RequestMapping("/testRest/{id}")public String testRestGet(@PathVariable Integer id){System.out.println("testRestGet:"+id);return SUCCESS;}@RequestMapping(value = "/testRest",method = RequestMethod.POST)public String testRestPost(){System.out.println("testRestPost:");return SUCCESS;}@RequestMapping(value = "/testRest/{id}",method = RequestMethod.PUT)public String testRestPut(@PathVariable Integer id){System.out.println("testRestPut:"+id);return SUCCESS;}@RequestMapping(value = "/testRest/{id}",method = RequestMethod.DELETE)public String testRestDelete(@PathVariable Integer id){System.out.println("testRestDelete:"+id);return SUCCESS;}}

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