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

1 private static final long serialVersionUID = -6821655106461234567L;  2
3     private String contextPath;  4     private String prefix;  5     private String suffix;  6
7     public void init(ServletConfig config) throws ServletException {  8         super.init(config);  9         contextPath = config.getServletContext().getContextPath(); 10         prefix = StringUtils.defaultIfEmpty( 11                 config.getInitParameter("prefix"), ""); 12         suffix = StringUtils.defaultIfEmpty( 13                 config.getInitParameter("suffix"), ".htm"); 14  } 15 　　//项目中其他的类调用此方法会进行处理
16     public void execute(RequestContext context) throws Exception {
17         String toUrl = context.getRequest().getRequestURI(); 18         toUrl = toUrl.replaceFirst(contextPath, prefix); 19         toUrl = toUrl.replace(suffix, ".jsp"); 20
21         context.getRequest().getRequestDispatcher(toUrl).forward(context.getRequest(), context.getResponse()); 22
23     }