码头服务器的会话为空

我正在尝试使用查看会话的servlet实现hello world Jetty项目（使用Jetty 9.3.6.v20151106）。但是，当我的代码运行时，我无法看到会话或存储任何cookie。我已经看过this stackoverflow问题，以帮助排除故障并实施了简单的BaseServlet建议，但每次运行它时，BaseServlet都会输出“无会话”。我是否缺少一些配置？码头服务器的会话为空

这里是我的HelloWorld.java类：

package com.my.company; 

import org.eclipse.jetty.server.HttpConfiguration; 
import org.eclipse.jetty.server.HttpConnectionFactory; 
import org.eclipse.jetty.server.Server; 
import org.eclipse.jetty.server.ServerConnector; 
import org.eclipse.jetty.server.SessionManager; 
import org.eclipse.jetty.server.handler.ContextHandlerCollection; 
import org.eclipse.jetty.server.session.HashSessionIdManager; 
import org.eclipse.jetty.server.session.HashSessionManager; 
import org.eclipse.jetty.server.session.SessionHandler; 
import org.eclipse.jetty.servlet.ServletContextHandler; 
import org.eclipse.jetty.servlet.ServletHandler; 
import org.eclipse.jetty.servlet.ServletHolder; 

public class HelloWorld { 

public static void main(String[] args) throws Exception { 
    //Create the server 
    Server server = new Server(); 

    // Configure for Http 
    HttpConfiguration http_config = new HttpConfiguration(); 
    http_config.setSecureScheme("https"); 
    http_config.setSecurePort(8443); 
    http_config.setOutputBufferSize(32768); 

    ServerConnector http = new ServerConnector(server, 
      new HttpConnectionFactory(http_config)); 
    int http_port = 12043; 
    http.setPort(http_port); 
    http.setIdleTimeout(30000); 
    server.addConnector(http); 

    //Add ServletContextHandler 
    ServletContextHandler servletContextHandler = new ServletContextHandler(
      ServletContextHandler.SESSIONS); 
    servletContextHandler.setContextPath("/"); 

    SessionManager sessionManager = new HashSessionManager(); 
    sessionManager.setMaxInactiveInterval(60 * 15); //session time out of 15 minutes 
    HashSessionIdManager idManager = new HashSessionIdManager(); 
    sessionManager.getSessionCookieConfig().setName("JSESSIONID_" + Integer.toString(http_port)); 
    sessionManager.setSessionIdManager(idManager); 
    server.setSessionIdManager(idManager); 
    SessionHandler sessionHandler = new SessionHandler(sessionManager); 
    servletContextHandler.setSessionHandler(sessionHandler); 
    server.setHandler(servletContextHandler); 

    //Add BaseServlet 
    ServletHolder holder = new ServletHolder(new BaseServlet()); 
    servletContextHandler.addServlet(holder, "/*"); 

    //Start the server 
    server.start(); 
    System.out.println("SERVER DUMP AFTER START" + server.dump()); 

    // The use of server.join() the will make the current thread join and 
    // wait until the server is done executing. 
    // See http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#join() 
    server.join(); 
    } 
}

这里是我BaseServlet.java类：

package com.my.company; 

import java.io.IOException; 
import java.io.PrintWriter; 
import java.util.Date; 

import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.servlet.http.HttpSession; 

public class BaseServlet extends HttpServlet { 
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { 
    boolean create = "true".equals(req.getParameter("create")); 

    HttpSession session = req.getSession(create); 
    if (create) { 
     session.setAttribute("created", new Date()); 
    } 

    PrintWriter pw = new PrintWriter(resp.getOutputStream()); 
    pw.println("Create = " + create); 
    if (session == null) { 
     pw.println("no session"); 
    } else { 
     pw.println("Session = " + session.getId()); 
     pw.println("Created = " + session.getAttribute("created")); 
    } 

    pw.flush(); 
    } 
}

这里是我的pom.xml文件：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
<modelVersion>4.0.0</modelVersion> 
<groupId>EmbeddJettyHelloWorld</groupId> 
<artifactId>EmbeddJettyHelloWorld</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<name>EmbeddJettyHelloWorld</name> 

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.codehaus.mojo</groupId> 
      <artifactId>exec-maven-plugin</artifactId> 
      <version>1.4.0</version> 
      <executions> 
       <execution> 
        <goals> 
         <goal>java</goal> 
        </goals> 
       </execution> 
      </executions> 
      <configuration> 
       <mainClass>com.my.company.HelloWorld</mainClass> 
       <classpathScope>test</classpathScope> 
       <systemProperties> 
        <property> 
         <key>basedir</key> 
         <value>${basedir}</value> 
        </property> 
       </systemProperties> 
      </configuration> 
     </plugin> 

     <plugin> 
      <groupId>org.eclipse.jetty</groupId> 
      <artifactId>jetty-maven-plugin</artifactId> 
      <version>${jetty-version}</version> 
      <configuration> 
       <webAppConfig> 
        <contextPath>/</contextPath> 
       </webAppConfig> 
       <webAppSourceDirectory>target/${project.artifactId}-${project.version}</webAppSourceDirectory> 
       <webDefaultXml>${project.basedir}/conf/jetty/webdefault.xml</webDefaultXml> 
      </configuration> 
     </plugin> 
    </plugins> 
</build> 
<dependencies> 
    <dependency> 
     <groupId>org.eclipse.jetty</groupId> 
     <artifactId>jetty-server</artifactId> 
     <version>${jetty-version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.eclipse.jetty</groupId> 
     <artifactId>jetty-servlet</artifactId> 
     <version>${jetty-version}</version> 
    </dependency> 
</dependencies> 

<properties> 
    <jetty-version>9.3.6.v20151106</jetty-version> 
</properties>

这是ou服务器转储tput的：

SERVER DUMP AFTER [email protected] - STARTED 
    += qtp1149319664{STARTED,8<=8<=200,i=5,q=0} - STARTED 
    | +- 15 qtp1149319664-15 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE 
    | +- 13 [email protected]@326de728 {HTTP/1.1,[http/1.1]}{0.0.0.0:12043} RUNNABLE @ sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) prio=3 
    | +- 14 qtp1149319664-14 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method) 
    | +- 12 qtp1149319664-12 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE 
    | +- 18 qtp1149319664-18 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE 
    | +- 16 qtp1149319664-16 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE 
    | +- 11 qtp1149319664-11 RUNNABLE @ sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method) 
    | +- 17 qtp1149319664-17 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE 
    += [email protected]{HTTP/1.1,[http/1.1]}{0.0.0.0:12043} - STARTED 
    | +~ [email protected] - STARTED 
    | +~ qtp1149319664{STARTED,8<=8<=200,i=5,q=0} - STARTED 
    | += [email protected]e - STARTED 
    | +- [email protected] 
    | += [email protected][HTTP/1.1] - STARTED 
    | | +- [email protected]{32768/8192,8192/8192,https://:8443,[]} 
    | += [email protected]4b6995df - STARTED 
    | | +- [email protected] id=0 keys=0 selected=0 id=0 
    | | | +- [email protected] keys=0 
    | | +- [email protected] id=1 keys=0 selected=0 id=1 
    | |  +- [email protected] keys=0 
    | +- sun.nio.ch.ServerSocketChannelImpl[/0:0:0:0:0:0:0:0:12043] 
    | +- [email protected]@326de728{HTTP/1.1,[http/1.1]}{0.0.0.0:12043} 
+= [email protected] - STARTED 
+= [email protected]{/,null,AVAILABLE} - STARTED 
    | += [email protected] - STARTED 
    | | += [email protected] - STARTED 
    | | | +~ [email protected] - STARTED 
    | | | += [email protected]b - STARTED 
    | | |  +- sun.misc.Unsafe.park(Native Method) 
    | | |  +- java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) 
    | | |  +- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078) 
    | | |  +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093) 
    | | |  +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809) 
    | | |  +- java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067) 
    | | |  +- java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127) 
    | | |  +- java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    | | |  +- java.lang.Thread.run(Thread.java:745) 
    | | += [email protected]afb23c - STARTED 
    | |  += [email protected]==com.rtn.iaf.BaseServlet,-1,true - STARTED 
    | |  +- [/*]=>com.rtn.iaf.BaseServlet-484b61fc 
    | |  += org.[email protected]1d1bf782==org.eclipse.jetty.servlet.ServletHandler$Default404Servlet,-1,false - STARTED 
    | |  +- [/]=>org.eclipse.jetty.servlet.ServletHandler$Default404Servlet-7a7b0070 
    | | 
    | +> No ClassLoader 
    | +> Handler attributes [email protected]{/,null,AVAILABLE} 
    | | +- org.eclipse.jetty.server.Executor=qtp1149319664{STARTED,8<=8<=200,i=5,q=0} 
    | +> Context attributes [email protected]{/,null,AVAILABLE} 
    | | +-  org.eclipse.jetty.util.DecoratedObjectFactory=org.eclipse.jetty.util.DecoratedObjectFactory[decorators=0] 
    | +> Initparams [email protected]{/,null,AVAILABLE} 
    | 
    +> [email protected] 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/EmbeddJettyHelloWorld/target/classes/ 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-server/9.3.6.v20151106/jetty-server-9.3.6.v20151106.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/javax/servlet/javax.servlet-api/3.1.0/javax.servlet-api-3.1.0.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-http/9.3.6.v20151106/jetty-http-9.3.6.v20151106.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-util/9.3.6.v20151106/jetty-util-9.3.6.v20151106.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-io/9.3.6.v20151106/jetty-io-9.3.6.v20151106.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-servlet/9.3.6.v20151106/jetty-servlet-9.3.6.v20151106.jar 
     +- file:/C:/Users/myUser/tutorialAndDemo_workspace/.m2/repository1/org/eclipse/jetty/jetty-security/9.3.6.v20151106/jetty-security-9.3.6.v20151106.jar 
     +- [email protected]

来源

2016-05-16 jencoston

与邮件列表上的码头用户的乡亲交谈后，我修改了代码，使它变为：

public static void main(String[] args) throws Exception { 
// Create the server 
Server server = new Server(12043); 

// Add ServletContextHandler 
ServletContextHandler servletContextHandler = new ServletContextHandler(
ServletContextHandler.SESSIONS); 
servletContextHandler.setContextPath("/"); 

server.setHandler(servletContextHandler); 

// Add BaseServlet 
ServletHolder holder = new ServletHolder(new BaseServlet()); 
servletContextHandler.addServlet(holder, "/*"); 

// Start the server 
server.start(); 
System.out.println("SERVER DUMP AFTER START" + server.dump()); 

server.join(); 

}

当输出为：请求=请求（GET //本地主机：12043 /）@ 968bbe8 响应= HTTP/1.1 200 日期：周四，2016年6月2日13时00分04秒GMT 创建=假没有会话

这是因为，调用request.getSession（false）不会创建会话。它只会返回它，如果它以前创建。

来源

2016-06-02 17:29:59 jencoston

码头服务器的会话为空

回答

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