我想在 java 动态 Web 应用程序中使用 Quartz 2.2 创建一个调度程序。我是这项任务的新手。我尝试了网络上的所有教程。我尝试使用上下文侦听器方法来初始化调度程序。它似乎不工作。hello world 程序仅适用于一般的 java 应用程序。对于 Web 应用程序，它看起来很棘手。
pom.xml：
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test.ananth</groupId>
<artifactId>test-app</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>test-app Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>servlet-api</artifactId>
<version>6.0.30</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz-jobs</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.6</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>test-app</finalName>
</build>
石英属性：
#org.quartz.scheduler.instanceName = MyScheduler
org.quartz.threadPool.threadCount = 3
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore
# Main Quartz configuration
org.quartz.scheduler.skipUpdateCheck = true
org.quartz.scheduler.instanceName = MyQuartzScheduler
org.quartz.scheduler.jobFactory.class = org.quartz.simpl.SimpleJobFactory
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
#org.quartz.threadPool.threadCount = 5
HelloJob.java：
package com.test;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class HelloJob implements Job {
public HelloJob() {
}
public void execute(JobExecutionContext context)
throws JobExecutionException {
System.out.println("Hello! HelloJob is executing.");
}
}
servlet.java 包 com.test；
import static org.quartz.JobBuilder.newJob;
import static org.quartz.SimpleScheduleBuilder.simpleSchedule;
import static org.quartz.TriggerBuilder.newTrigger;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;
public class MyServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1567185871113714035L;
public void init(ServletConfig cfg) {
String key = "org.quartz.impl.StdSchedulerFactory.KEY";
ServletContext servletContext = cfg.getServletContext();
StdSchedulerFactory factory = (StdSchedulerFactory) servletContext
.getAttribute(key);
// Scheduler quartzScheduler = factory.getScheduler("MyQuartzScheduler");
Scheduler sched;
try {
sched = factory.getScheduler("MyQuartzScheduler");
//sched = factory.getScheduler();//MyQuartzScheduler
sched.start();
// define the job and tie it to our HelloJob class
JobDetail job = newJob(HelloJob.class).withIdentity("myJob",
"group1").build();
// Trigger the job to run now, and then every 40 seconds
Trigger trigger = newTrigger()
.withIdentity("myTrigger", "group1")
.startNow()
.withSchedule(
simpleSchedule().withIntervalInSeconds(4)
.repeatForever()).build();
// Tell quartz to schedule the job using our trigger
sched.scheduleJob(job, trigger);
} catch (SchedulerException e) {
e.printStackTrace();
}
}
}
Web.xml：
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<context-param>
<context-param>
<param-name>quartz:shutdown-on-unload</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>quartz:wait-on-shutdown</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>quartz:start-scheduler-on-load</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>quartz:config-file</param-name>
<param-value>/WEB-INF/quartz.properties</param-value>
</context-param>
<listener>
<listener-class>
org.quartz.ee.servlet.QuartzInitializerListener
</listener-class>
</listener>
<listener>
<listener-class>com.test.ApplicationStartup</listener-class>
</listener>
<display-name>Archetype Created Web Application</display-name>
</web-app>
我正在使用 Maven 网络应用程序架构。