Jetty實戰之 嵌入式Jetty運行Servlet

 

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

 

Jetty實戰之 嵌入式Jetty運行Servlet

分類：JettyJava

 （19530）  （3）

本文連接：http://blog.csdn.net/kongxx/article/details/7230080

在嵌入式Jetty中，有時候咱們想運行一些的Servlet，此時就須要建立建立Context，而後讓本身的Servlet運行在這些ServletContext中。

1. 首先建立一個ServletContextServer類，用來初始化web應用程序的Context，而且指定Servlet和Servlet匹配的url。這裏指定了兩個Servlet，分別是HelloServlet和GoodbyeServlet，並分別對應/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();
    }
}

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());
    }
}

3. 運行ServletContextServer類，而後分別訪問如下四個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，也能夠建立兩個個Context，分別綁定到"/hello"和"/goodbye"，以下：

 

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();
    }
}

 

 

 

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