Jetty实战之嵌入式Jetty运行Servlet

来源：互联网发布：英菲克下载软件数字编辑：程序博客网时间：2024/05/16 18:06

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/*。

[java] view plaincopyprint?

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 plaincopyprint?

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 plaincopyprint?

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();
}
}

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Jetty实战之 嵌入式Jetty运行Servlet

Jetty实战之嵌入式Jetty运行Servlet