从嵌入式Jetty中的备用路径提供静态文件

你需要什么：

1. “ /”处的DefaultServlet（推荐，这是servlet规范的要求）
   这应该在“默认”的命名调度程序处（servlet规范的另一个要求）
   
2. 通过init-params配置的具有自定义静态内容的备用DefaultServlet
   使用与“默认”不同的命名调度程序（以避免其他servlet规范功能之间的名称冲突）
   
3. 你可以使用

   ServletHolder.setInitParameter(name,value)

   来完成此操作
4. 确保将pathInfoOnly参数设置为true（以解决“默认”命名调度程序的特殊情况）
5. 你自己的Servlet，用于提供动态内容。

AltDefaultServlet.java

package jetty.demo;import org.eclipse.jetty.server.Server;import org.eclipse.jetty.server.ServerConnector;import org.eclipse.jetty.servlet.DefaultServlet;import org.eclipse.jetty.servlet.ServletContextHandler;import org.eclipse.jetty.servlet.ServletHolder;public class AltDefaultServlet{    public static void main(String[] args)    {        System.setProperty("org.eclipse.jetty.LEVEL","INFO");        Server server = new Server();        ServerConnector connector = new ServerConnector(server);        connector.setPort(8080);        server.addConnector(connector);        // The filesystem paths we will map        String homePath = System.getProperty("user.home");        String pwdPath = System.getProperty("user.dir");        // Setup the basic application "context" for this application at "/"        // This is also known as the handler tree (in jetty speak)        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);        context.setbaseResource(Resource.newResource(pwdPath));        context.setContextPath("/");        server.setHandler(context);        // add a simple Servlet at "/dynamic/*"        ServletHolder holderDynamic = new ServletHolder("dynamic", DynamicServlet.class);        context.addServlet(holderDynamic, "/dynamic/*");        // add special pathspec of "/home/" content mapped to the homePath        ServletHolder holderHome = new ServletHolder("static-home", DefaultServlet.class);        holderHome.setInitParameter("resourcebase",homePath);        holderHome.setInitParameter("dirAllowed","true");        holderHome.setInitParameter("pathInfoOnly","true");        context.addServlet(holderHome,"/home/*");        // Lastly, the default servlet for root content (always needed, to satisfy servlet spec)        // It is important that this is last.        ServletHolder holderPwd = new ServletHolder("default", DefaultServlet.class);        holderPwd.setInitParameter("dirAllowed","true");        context.addServlet(holderPwd,"/");        try        { server.start(); server.dump(System.err); server.join();        }        catch (Throwable t)        { t.printStackTrace(System.err);        }    }}