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/*。
[java] view plain copy print ? 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： [java] view plain copy print ? 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：
[java] view plain copy print ? 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(); } }
