Jetty实战之 嵌入式Jetty运行Servlet

http://blog.csdn.net/kongxx/article/details/7230080

Jetty实战之 嵌入式Jetty运行Servlet

分类：JettyJava

（19530）  （3）

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/*。

1. package com.google.code.garbagecan.jettystudy.sample5;
2. import org.eclipse.jetty.server.Server;
3. import org.eclipse.jetty.servlet.ServletContextHandler;
4. import org.eclipse.jetty.servlet.ServletHolder;
5. public class ServletContextServer {
6. public static void main(String[] args) throws Exception {
7. Server server = new Server(8080);
8. ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
9. context.setContextPath("/");
10. server.setHandler(context);
11. // http://localhost:8080/hello
12. context.addServlet(new ServletHolder(new HelloServlet()), "/hello");
13. // http://localhost:8080/hello/kongxx
14. context.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/hello/kongxx");
15. // http://localhost:8080/goodbye
16. context.addServlet(new ServletHolder(new GoodbyeServlet()), "/goodbye");
17. // http://localhost:8080/goodbye/kongxx
18. context.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/goodbye/kongxx");
19. server.start();
20. server.join();
21. }
22. }

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

1. package com.google.code.garbagecan.jettystudy.sample5;
2. import java.io.IOException;
3. import javax.servlet.ServletException;
4. import javax.servlet.http.HttpServlet;
5. import javax.servlet.http.HttpServletRequest;
6. import javax.servlet.http.HttpServletResponse;
7. public class HelloServlet extends HttpServlet {
8. private static final long serialVersionUID = 1L;
9. private String msg = "Hello World!";
10. public HelloServlet() {
11. }
12. public HelloServlet(String msg) {
13. this.msg = msg;
14. }
15. protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
16. response.setContentType("text/html");
17. response.setStatus(HttpServletResponse.SC_OK);
18. response.getWriter().println("<h1>" + msg + "</h1>");
19. response.getWriter().println("session=" + request.getSession(true).getId());
20. }
21. }
22. package com.google.code.garbagecan.jettystudy.sample5;
23. import java.io.IOException;
24. import javax.servlet.ServletException;
25. import javax.servlet.http.HttpServlet;
26. import javax.servlet.http.HttpServletRequest;
27. import javax.servlet.http.HttpServletResponse;
28. public class GoodbyeServlet extends HttpServlet {
29. private static final long serialVersionUID = 1L;
30. private String msg = "Goodbye!";
31. public GoodbyeServlet() {
32. }
33. public GoodbyeServlet(String msg) {
34. this.msg = msg;
35. }
36. protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
37. response.setContentType("text/html");
38. response.setStatus(HttpServletResponse.SC_OK);
39. response.getWriter().println("<h1>" + msg + "</h1>");
40. response.getWriter().println("session=" + request.getSession(true).getId());
41. }
42. }

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：

1. package com.google.code.garbagecan.jettystudy.sample5;
2. import org.eclipse.jetty.server.Handler;
3. import org.eclipse.jetty.server.Server;
4. import org.eclipse.jetty.server.handler.ContextHandlerCollection;
5. import org.eclipse.jetty.servlet.ServletContextHandler;
6. import org.eclipse.jetty.servlet.ServletHolder;
7. public class MultiContextServer {
8. public static void main(String[] args) throws Exception {
9. Server server = new Server(8080);
10. // http://localhost:8080/hello/kongxx
11. ServletContextHandler context1 = new ServletContextHandler(ServletContextHandler.SESSIONS);
12. context1.setContextPath("/hello");
13. context1.setResourceBase(".");
14. context1.setClassLoader(Thread.currentThread().getContextClassLoader());
15. context1.addServlet(new ServletHolder(new HelloServlet("Hello Kongxx!")), "/kongxx");
16. // http://localhost:8080/goodbye/kongxx
17. ServletContextHandler context2 = new ServletContextHandler(ServletContextHandler.SESSIONS);
18. context2.setContextPath("/goodbye");
19. context2.setResourceBase(".");
20. context2.setClassLoader(Thread.currentThread().getContextClassLoader());
21. context2.addServlet(new ServletHolder(new GoodbyeServlet("Goodbye kongxx!")), "/kongxx");
22. ContextHandlerCollection contexts = new ContextHandlerCollection();
23. contexts.setHandlers(new Handler[] { context1, context2 });
24. server.setHandler(contexts);
25. server.start();
26. server.join();
27. }
28. }

 

 

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