Jetty实战之 嵌入式Jetty运行Servlet

转载链接：http://blog.csdn.net/kongxx/article/details/7230080

在嵌入式Jetty中，有时候我们想运行一些的Servlet，此时就需要创建创建Context，然后让自己的Servlet运行在这些ServletContext中。

1. 首先创建一个ServletContextServer类，用来初始化web应用程序的Context，并且指定Servlet和Servlet匹配的url。这里指定了两个Servlet，分别是HelloServlet和GoodbyeServlet，并分别对应/hello/*和/goodbye/*。

    package com.google.code.garbagecan.jettystudy.sample5;            import org.eclipse.jetty.server.Server;      import org.eclipse.jetty.servlet.ServletContextHandler;      import org.eclipse.jetty.servlet.ServletHolder;            public class ServletContextServer {          public static void main(String[] args) throws Exception {              Server server = new Server(8080);                    ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);              context.setContextPath("/");              server.setHandler(context);                    // http://localhost:8080/hello              context.addServlet(new ServletHolder(new HelloServlet()), "/hello");              // http://localhost:8080/hello/kongxx              context.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/hello/kongxx");                    // http://localhost:8080/goodbye              context.addServlet(new ServletHolder(new GoodbyeServlet()), "/goodbye");              // http://localhost:8080/goodbye/kongxx              context.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/goodbye/kongxx");                            server.start();              server.join();          }      }  

?2. 两个简单的Servlet：HelloServlet和GoodbyeServlet：

    package com.google.code.garbagecan.jettystudy.sample5;            import java.io.IOException;      import javax.servlet.ServletException;      import javax.servlet.http.HttpServlet;      import javax.servlet.http.HttpServletRequest;      import javax.servlet.http.HttpServletResponse;            public class HelloServlet extends HttpServlet {          private static final long serialVersionUID = 1L;          private String msg = "Hello World!";                public HelloServlet() {          }                public HelloServlet(String msg) {              this.msg = msg;          }                protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {              response.setContentType("text/html");              response.setStatus(HttpServletResponse.SC_OK);              response.getWriter().println("<h1>" + msg + "</h1>");              response.getWriter().println("session=" + request.getSession(true).getId());          }      }            package com.google.code.garbagecan.jettystudy.sample5;            import java.io.IOException;      import javax.servlet.ServletException;      import javax.servlet.http.HttpServlet;      import javax.servlet.http.HttpServletRequest;      import javax.servlet.http.HttpServletResponse;            public class GoodbyeServlet extends HttpServlet {          private static final long serialVersionUID = 1L;          private String msg = "Goodbye!";                public GoodbyeServlet() {          }                public GoodbyeServlet(String msg) {              this.msg = msg;          }                protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {              response.setContentType("text/html");              response.setStatus(HttpServletResponse.SC_OK);              response.getWriter().println("<h1>" + msg + "</h1>");              response.getWriter().println("session=" + request.getSession(true).getId());          }      }  

?3. 运行ServletContextServer类，然后分别访问以下四个url

? http://localhost:8080/hello
? http://localhost:8080/hello/kongxx
? http://localhost:8080/goodbye
? http://localhost:8080/goodbye/kongxx

?

4. 除了上面的方式外，也可以创建两个个Context，分别绑定到"/hello"和"/goodbye"，如下：

    package com.google.code.garbagecan.jettystudy.sample5;            import org.eclipse.jetty.server.Handler;      import org.eclipse.jetty.server.Server;      import org.eclipse.jetty.server.handler.ContextHandlerCollection;      import org.eclipse.jetty.servlet.ServletContextHandler;      import org.eclipse.jetty.servlet.ServletHolder;            public class MultiContextServer {          public static void main(String[] args) throws Exception {              Server server = new Server(8080);                    // http://localhost:8080/hello/kongxx              ServletContextHandler context1 = new ServletContextHandler(ServletContextHandler.SESSIONS);              context1.setContextPath("/hello");              context1.setResourceBase(".");              context1.setClassLoader(Thread.currentThread().getContextClassLoader());              context1.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/kongxx");                    // http://localhost:8080/goodbye/kongxx              ServletContextHandler context2 = new ServletContextHandler(ServletContextHandler.SESSIONS);              context2.setContextPath("/goodbye");              context2.setResourceBase(".");              context2.setClassLoader(Thread.currentThread().getContextClassLoader());              context2.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/kongxx");                    ContextHandlerCollection contexts = new ContextHandlerCollection();              contexts.setHandlers(new Handler[] { context1, context2 });                    server.setHandler(contexts);                    server.start();              server.join();          }      }