web项目更改文件后缀，隐藏编程语言

从Java EE5.0开始，<servlet-mapping>标签就可以配置多个<url-pattern>。例如可以同时将urlServlet配置一下多个映射方式：

<servlet>
	<servlet-name>servletName</servlet-name>
	<servlet-class>com.copy.project.UrlServlet</servlet-class>
</servlet>
<servlet-mapping>
		<servlet-name>servletName</servlet-name>
		<url-pattern>/servlet/urlServlet</url-pattern>
		<url-pattern>/servlet/urlServlet.asp</url-pattern>
		<url-pattern>/servlet/urlServlet.jsp</url-pattern>
		<url-pattern>/servlet/urlServlet.php</url-pattern>
</servlet-mapping>

这时，不加后缀和加.asp/.jsp/.php访问，都会正常显示。

项目中

web.xml中配置

<servlet>
    <servlet-name>JSP Protect</servlet-name>
    <servlet-class>com.companyname.web.JspProtect</servlet-class>
    <init-param>
        <param-name>prefix</param-name>
        <param-value>/wp</param-value>
    </init-param>
    <init-param>
        <param-name>suffix</param-name>
        <param-value>.shtm</param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>JSP Protect</servlet-name>
    <url-pattern>*.shtm</url-pattern>
</servlet-mapping>

JspProtect类

 private static final long serialVersionUID = -6821655106461234567L;

     private String contextPath;
     private String prefix;
     private String suffix;

     public void init(ServletConfig config) throws ServletException {
         super.init(config);
         contextPath = config.getServletContext().getContextPath();
         prefix = StringUtils.defaultIfEmpty(
                 config.getInitParameter("prefix"), "");
         suffix = StringUtils.defaultIfEmpty(
                 config.getInitParameter("suffix"), ".htm");
     }
 　　//项目中其他的类调用此方法会进行处理
     public void execute(RequestContext context) throws Exception {
         String toUrl = context.getRequest().getRequestURI();
         toUrl = toUrl.replaceFirst(contextPath, prefix);
         toUrl = toUrl.replace(suffix, ".jsp");

         context.getRequest().getRequestDispatcher(toUrl).forward(context.getRequest(), context.getResponse());

     }