Jetty實戰之 嵌入式Jetty運行Servlet

在嵌入式Jetty中，有時候我們想運行一些的Servlet，此時就需要創建創建Context，然后讓自己的Servlet運行在這些ServletContext中。

1. 首先創建一個ServletContextServer類，用來初始化web應用程序的Context，并且指定Servlet和Servlet匹配的 url。這里指定了兩個Servlet，分別是HelloServlet和GoodbyeServlet，并分別對應/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();
}

}</pre>2. 兩個簡單的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());
}

}</pre>3. 運行ServletContextServer類，然后分別訪問以下四個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，也可以創建兩個個Context，分別綁定到"/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();
}

}</pre>

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