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  • SpringMVC 控制器默认支持GET和POST两种方式

    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

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  • 原文地址:https://www.cnblogs.com/shuimuzhushui/p/7255347.html
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