Java 查找多servlet映射场景中使用的匹配url模式

假设我有一个Java servlet，我想用于两个（或更多）不同的url模式：

  <servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/this/exact/path</url-pattern>
  </servlet-mapping>

  <servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/that/prefix/path/*</url-pattern>
  </servlet-mapping>

  <servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/yet/another/exact/path</url-pattern>
  </servlet-mapping>

我想知道的是，如何从代码内部判断请求匹配的路径。（即，如果请求是向

/myapp/yet/other/exact/path

发出的，我想获取字符串

/yet/other/exact/path

）

我还想应该有一种方法来区分/that/prefix/path/和曾经匹配过的*如果有人能告诉我应该怎么做就好了

我尝试了

String path=req.getRequestURI（）

，但它也返回了/myapp部分。

您应该使用：

     /**
     *
     * Returns any extra path information associated with
     * the URL the client sent when it made this request.
     * The extra path information follows the servlet path
     * but precedes the query string and will start with
     * a "/" character.
     *
     * <p>This method returns <code>null</code> if there
     * was no extra path information.
     *
     * <p>Same as the value of the CGI variable PATH_INFO.
     *
     *
     * @return      a <code>String</code>, decoded by the
     *          web container, specifying 
     *          extra path information that comes
     *          after the servlet path but before
     *          the query string in the request URL;
     *          or <code>null</code> if the URL does not have
     *          any extra path information
     *
     */
    public String getPathInfo();

---

HttpServletRequest.getServletPath（）

返回URL模式，不包括

/*

，而

HttpServletRequest.getPathInfo（）

返回与

/*

匹配的部分（或

null

用于精确匹配）

     /**
     *
     * Returns any extra path information associated with
     * the URL the client sent when it made this request.
     * The extra path information follows the servlet path
     * but precedes the query string and will start with
     * a "/" character.
     *
     * <p>This method returns <code>null</code> if there
     * was no extra path information.
     *
     * <p>Same as the value of the CGI variable PATH_INFO.
     *
     *
     * @return      a <code>String</code>, decoded by the
     *          web container, specifying 
     *          extra path information that comes
     *          after the servlet path but before
     *          the query string in the request URL;
     *          or <code>null</code> if the URL does not have
     *          any extra path information
     *
     */
    public String getPathInfo();