在SpringMVC的controller中，@RequestMapping只写路径，不包含RequetMethod.GET和RequetMethod.POST，HttpServletRequest的getParameter(“*”)方法同时支持这两种方式。
1 @RequestMapping("savedata")
2 public @ResponseBody void savedata(HttpServletRequest req, HttpServletResponse resp) throws Exception {
3
4 String taskClass = req.getParameter("taskclass");
ServletRequest接口中对该方法的说明如下，可以从请求字符串（URL）和POST实体（通过getInputStream和getReader方法）中读取参数：
1 /**
2 * Returns the value of a request parameter as a <code>String</code>,
3 * or <code>null</code> if the parameter does not exist. Request parameters
4 * are extra information sent with the request. For HTTP servlets,
5 * parameters are contained in the query string or posted form data.
6 *
7 * <p>You should only use this method when you are sure the
8 * parameter has only one value. If the parameter might have
9 * more than one value, use {@link #getParameterValues}.
10 *
11 * <p>If you use this method with a multivalued
12 * parameter, the value returned is equal to the first value
13 * in the array returned by <code>getParameterValues</code>.
14 *
15 * <p>If the parameter data was sent in the request body, such as occurs
16 * with an HTTP POST request, then reading the body directly via {@link
17 * #getInputStream} or {@link #getReader} can interfere
18 * with the execution of this method.
19 *
20 * @param name a <code>String</code> specifying the name of the parameter
21 *
22 * @return a <code>String</code> representing the single value of
23 * the parameter
24 *
25 * @see #getParameterValues
26 */
27 public String getParameter(String name);
参考：
http://tomcat.apache.org/tomcat-5.5-doc/servletapi/index.html
http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-ann-requestmapping