由於瀏覽器不支援PUT和DELETE方法，那麼我們如何通過Spring實現PUT和DELETE的rest風格呢？

步驟一：

        在web.xml中新增一個Spring的過濾器HiddenHttpMethodFilter，對DispatcherServlet進行預處理

        <!-- spring mvc 實現delete、put的restful風格過濾器 start-->
	<filter>
		<filter-name>HiddenHttpMethodFilter</filter-name>
		<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>HiddenHttpMethodFilter</filter-name>
                <!-- DispatcherServlet 對應的servlet-name-->
                <servlet-name>dispatcher</servlet-name>
        </filter-mapping>
        <!-- spring mvc 實現delete、put的restful風格過濾器 end-->
 

      向後臺提交請求時，將請求型別設定為“POST”，同時向後臺傳遞一個引數"_method"，引數值可以設定為PUT或DELETE

Demo：ajax 刪除restful風格

       deleteById:function(id,callback){
		//基礎驗證
		var url = controllerUtil.controllers.deleteById;
		if(url.trim().length<=0){
			throw new Error("please init controllerUtil.controllers.deleteById first.");
		}
		console.log("id:"+id);
		$.ajax({
			url : url+"/"+id,
			type : "POST",
			data : {_method:"DELETE"},
			dataType : "json",
			async : true,
			success : function(ajaxResult) {
				callback(ajaxResult);
			},
			error : function(error) {
				alert("error");
			}
	});
	}
 

    /**
     * 刪除節點
     * @param node
     * @return
     */
    @RequestMapping(value="/node/{id}",method=RequestMethod.DELETE)
    @ResponseBody
    public AjaxResult deleteTreeNode(@PathVariable("id")Long id) {
        getService().deleteById(id);
        return AjaxResult.getInstance();
    }

public class HiddenHttpMethodFilter extends OncePerRequestFilter {

	/** Default method parameter: {@code _method} */
	public static final String DEFAULT_METHOD_PARAM = "_method";

	private String methodParam = DEFAULT_METHOD_PARAM;


	/**
	 * Set the parameter name to look for HTTP methods.
	 * @see #DEFAULT_METHOD_PARAM
	 */
	public void setMethodParam(String methodParam) {
		Assert.hasText(methodParam, "'methodParam' must not be empty");
		this.methodParam = methodParam;
	}

	@Override
	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
			throws ServletException, IOException {

		String paramValue = request.getParameter(this.methodParam);
		if ("POST".equals(request.getMethod()) && StringUtils.hasLength(paramValue)) {
			String method = paramValue.toUpperCase(Locale.ENGLISH);
			HttpServletRequest wrapper = new HttpMethodRequestWrapper(request, method);
			filterChain.doFilter(wrapper, response);
		}
		else {
			filterChain.doFilter(request, response);
		}
	}


	/**
	 * Simple {@link HttpServletRequest} wrapper that returns the supplied method for
	 * {@link HttpServletRequest#getMethod()}.
	 */
	private static class HttpMethodRequestWrapper extends HttpServletRequestWrapper {

		private final String method;

		public HttpMethodRequestWrapper(HttpServletRequest request, String method) {
			super(request);
			this.method = method;
		}

		@Override
		public String getMethod() {
			return this.method;
		}
	}

}