学步园

本文链接：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;</p> <p>import org.eclipse.jetty.server.Server;<br /> import org.eclipse.jetty.servlet.ServletContextHandler;<br /> import org.eclipse.jetty.servlet.ServletHolder;</p> <p>public class ServletContextServer {<br /> public static void main(String[] args) throws Exception {<br /> Server server = new Server(8080);</p> <p> ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);<br /> context.setContextPath("/");<br /> server.setHandler(context);</p> <p> // http://localhost:8080/hello<br /> context.addServlet(new ServletHolder(new HelloServlet()), "/hello");<br /> // http://localhost:8080/hello/kongxx<br /> context.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/hello/kongxx");</p> <p> // http://localhost:8080/goodbye<br /> context.addServlet(new ServletHolder(new GoodbyeServlet()), "/goodbye");<br /> // http://localhost:8080/goodbye/kongxx<br /> context.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/goodbye/kongxx");</p> <p> server.start();<br /> server.join();<br /> }<br /> }2. 两个简单的Servlet：HelloServlet和GoodbyeServlet：
package com.google.code.garbagecan.jettystudy.sample5;</p> <p>import java.io.IOException;<br /> import javax.servlet.ServletException;<br /> import javax.servlet.http.HttpServlet;<br /> import javax.servlet.http.HttpServletRequest;<br /> import javax.servlet.http.HttpServletResponse;</p> <p>public class HelloServlet extends HttpServlet {<br /> private static final long serialVersionUID = 1L;<br /> private String msg = "Hello World!";</p> <p> public HelloServlet() {<br /> }</p> <p> public HelloServlet(String msg) {<br /> this.msg = msg;<br /> }</p> <p> protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {<br /> response.setContentType("text/html");<br /> response.setStatus(HttpServletResponse.SC_OK);<br /> response.getWriter().println("<h1>" + msg + "</h1>");<br /> response.getWriter().println("session=" + request.getSession(true).getId());<br /> }<br /> }</p> <p>package com.google.code.garbagecan.jettystudy.sample5;</p> <p>import java.io.IOException;<br /> import javax.servlet.ServletException;<br /> import javax.servlet.http.HttpServlet;<br /> import javax.servlet.http.HttpServletRequest;<br /> import javax.servlet.http.HttpServletResponse;</p> <p>public class GoodbyeServlet extends HttpServlet {<br /> private static final long serialVersionUID = 1L;<br /> private String msg = "Goodbye!";</p> <p> public GoodbyeServlet() {<br /> }</p> <p> public GoodbyeServlet(String msg) {<br /> this.msg = msg;<br /> }</p> <p> protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {<br /> response.setContentType("text/html");<br /> response.setStatus(HttpServletResponse.SC_OK);<br /> response.getWriter().println("<h1>" + msg + "</h1>");<br /> response.getWriter().println("session=" + request.getSession(true).getId());<br /> }<br /> }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;</p> <p>import org.eclipse.jetty.server.Handler;<br /> import org.eclipse.jetty.server.Server;<br /> import org.eclipse.jetty.server.handler.ContextHandlerCollection;<br /> import org.eclipse.jetty.servlet.ServletContextHandler;<br /> import org.eclipse.jetty.servlet.ServletHolder;</p> <p>public class MultiContextServer {<br /> public static void main(String[] args) throws Exception {<br /> Server server = new Server(8080);</p> <p> // http://localhost:8080/hello/kongxx<br /> ServletContextHandler context1 = new ServletContextHandler(ServletContextHandler.SESSIONS);<br /> context1.setContextPath("/hello");<br /> context1.setResourceBase(".");<br /> context1.setClassLoader(Thread.currentThread().getContextClassLoader());<br /> context1.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/kongxx");</p> <p> // http://localhost:8080/goodbye/kongxx<br /> ServletContextHandler context2 = new ServletContextHandler(ServletContextHandler.SESSIONS);<br /> context2.setContextPath("/goodbye");<br /> context2.setResourceBase(".");<br /> context2.setClassLoader(Thread.currentThread().getContextClassLoader());<br /> context2.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/kongxx");</p> <p> ContextHandlerCollection contexts = new ContextHandlerCollection();<br /> contexts.setHandlers(new Handler[] { context1, context2 });</p> <p> server.setHandler(contexts);</p> <p> server.start();<br /> server.join();<br /> }<br /> }