BlogJava-我的漫漫程序之旅-文章分类-opensourcehttp://www.blogjava.net/supercrsky/category/31359.html专注于JavaWeb开发zh-cnFri, 09 May 2008 19:51:49 GMTFri, 09 May 2008 19:51:49 GMT60JFreeChart在Web中的 应用 http://www.blogjava.net/supercrsky/articles/199551.html々上善若水々々上善若水々Fri, 09 May 2008 08:45:00 GMThttp://www.blogjava.net/supercrsky/articles/199551.htmlhttp://www.blogjava.net/supercrsky/comments/199551.htmlhttp://www.blogjava.net/supercrsky/articles/199551.html#Feedback0http://www.blogjava.net/supercrsky/comments/commentRss/199551.htmlhttp://www.blogjava.net/supercrsky/services/trackbacks/199551.html把图表数据显示的jsp中.

首先我们建一个Servlet:

package com;

import java.awt.Color;
import java.io.File;
import java.io.IOException;

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

import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieToolTipGenerator;
import org.jfree.chart.plot.PiePlot3D;
import org.jfree.chart.urls.StandardPieURLGenerator;
import org.jfree.data.general.DefaultPieDataset;

/**
 * 
 * @author zdw
 * 
 */
@SuppressWarnings("serial")
public class ChartServlet extends HttpServlet
{
    public ChartServlet()
    {
        super();
    }

    public void init() throws ServletException
    {
    }

    private void createPieChart(String path) throws IOException
    {
        // 饼图数据源
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("中国", 44.4);
        dataset.setValue("美国", 25.5);
        dataset.setValue("日本", 18.5);
        dataset.setValue("刚果", 4.6);
        dataset.setValue("英国", 5.5);
        dataset.setValue("其他", 0.5);
        // 生成3D饼图
        PiePlot3D plot = new PiePlot3D(dataset);
        plot.setToolTipGenerator(new StandardPieToolTipGenerator());
        // 设置图片链接
        plot.setURLGenerator(new StandardPieURLGenerator(
                "http://www.blogjava.net/supercrsky"));

        JFreeChart chart = new JFreeChart("人口统计表",
                JFreeChart.DEFAULT_TITLE_FONT, plot, true);
        chart.setBackgroundPaint(Color.gray);
        ChartUtilities.saveChartAsJPEG(new File(path), chart, 800, 600);
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        System.out.println("get begin");
        // 得到当前网站在服务上的绝对路径
        String path = request.getSession().getServletContext().getRealPath("/");
        // 保存到根目录
        createPieChart(path + "/chart.jpg");
        request.getRequestDispatcher("/index.jsp").forward(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        System.out.println("post begin");
        this.doGet(request, response);
    }

    public void destroy()
    {
        super.destroy();
    }

}

web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <servlet>
    <servlet-name>ChartServlet</servlet-name>
    <servlet-class>com.ChartServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>ChartServlet</servlet-name>
    <url-pattern>/servlet/ChartServlet</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

index.jsp:
<%@ page language="java" pageEncoding="gbk"%>
<html>
    <head>
        <title>人口统计表</title>
    </head>
    <body>
        <hr />
        <img src="/jfreechart/chart.jpg" />
    </body>
</html>
在浏览器中输入:
http://localhost:8888/jfreechart/servlet/ChartServlet
就可以看生成的饼图效果了.

源码可以点此下载

々上善若水々 2008-05-09 16:45 发表评论
]]>Quartz高级部分(Spring默认对Quartz的支持)http://www.blogjava.net/supercrsky/articles/199443.html々上善若水々々上善若水々Fri, 09 May 2008 03:13:00 GMThttp://www.blogjava.net/supercrsky/articles/199443.htmlhttp://www.blogjava.net/supercrsky/comments/199443.htmlhttp://www.blogjava.net/supercrsky/articles/199443.html#Feedback0http://www.blogjava.net/supercrsky/comments/commentRss/199443.htmlhttp://www.blogjava.net/supercrsky/services/trackbacks/199443.html 你甚至不需要添加任何额外的jar包.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
    <bean name="quartzScheduler"
        class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="cronTrigger" />
            </list>
        </property>
        <!-- 指定你属性文件的位置(非必须) -->
        <property name="configLocation"
            value="classpath:org/quartz/quartz.properties" />
    </bean>

    <bean id="cronTrigger"
        class="org.springframework.scheduling.quartz.CronTriggerBean">
        <property name="jobDetail" ref="jobDetail" />
        <!--朝九晚五工作时间内每半小时执行一次-->
        <property name="cronExpression" value="0 0/30 9-17 *,* * ?" />
    </bean>

    <!-- 使用pojo做job，指定pojo和method -->
    <bean id="jobDetail"
        class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <!-- 这时关联你的计划类 -->
        <property name="targetObject" ref="bookStockChecker" />
        <!-- 你的计划类的具体方法 -->
        <property name="targetMethod" value="check" />
    </bean>

    <!-- 图书库存检查类 -->
    <bean id="bookStockChecker" class="org.quartz.BookStockChecker"
        autowire="byName" lazy-init="true">
        <!-- 这里为类的属性初始值 -->
        <property name="minStock" value="100" />
    </bean>
</beans>

资源文件:
#============================================================================
# 配置 Main Scheduler Properties
#============================================================================
org.quartz.scheduler.instanceName = DefaultQuartzScheduler
org.quartz.scheduler.rmi.export = false
org.quartz.scheduler.rmi.proxy = false
org.quartz.scheduler.wrapJobExecutionInUserTransaction = false

#============================================================================
# 配置执行线程池
#============================================================================
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 10
org.quartz.threadPool.threadPriority = 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true

#============================================================================
# 配置 JobStore
#============================================================================
org.quartz.jobStore.misfireThreshold = 60000

#内存中JobStore, 服务器重启时执行记录会丢失
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

#数据库中JobStore
#org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.MSSQLDelegate
#org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.OracleDelegate


々上善若水々 2008-05-09 11:13 发表评论
]]>Quartz高级部分JobStorehttp://www.blogjava.net/supercrsky/articles/199438.html々上善若水々々上善若水々Fri, 09 May 2008 02:51:00 GMThttp://www.blogjava.net/supercrsky/articles/199438.htmlhttp://www.blogjava.net/supercrsky/comments/199438.htmlhttp://www.blogjava.net/supercrsky/articles/199438.html#Feedback0http://www.blogjava.net/supercrsky/comments/commentRss/199438.htmlhttp://www.blogjava.net/supercrsky/services/trackbacks/199438.html JobStore,它都是通过属性文件来配置的.

下面我们做一个RAMJobStore的 例子.

建一个job:

package com;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class PropJob implements Job
{
    private static final Log log = LogFactory.getLog(PropJob.class);
    
    
    public void execute(JobExecutionContext context) throws JobExecutionException
    {
        System.out.println("begin:::::");
        log.info("job is begin:" + context.getTrigger().getName());
    }

}
测试类:

package com;

import java.util.Calendar;

import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;

public class PriorityDemo
{
    public void run() throws Exception
    {
        // 从属性文件中读取工程池信息
        SchedulerFactory sf = new StdSchedulerFactory(
                "src/com/quartz.properties");
        Scheduler scheduler = sf.getScheduler();
        JobDetail job = new JobDetail("propJob", null, PropJob.class);
        Calendar startTime = Calendar.getInstance();
        // 在当前时间上加5秒
        startTime.add(Calendar.SECOND, 5);
        /**
         * String name, String group, String jobName, String jobGroup, Date
         * startTime, Date endTime, int repeatCount, long repeatInterval
         */
        // 每5秒一次
        SimpleTrigger trigger1 = new SimpleTrigger("trigger1", null, startTime
                .getTime(), null, 1, 5L * 1000L);
        trigger1.setPriority(-5);
        trigger1.setJobName("propJob");
        // 每10秒一次
        SimpleTrigger trigger2 = new SimpleTrigger("trigger2", null, startTime
                .getTime(), null, 1, 10L * 1000L);
        trigger2.setJobName("propJob");
        // 每15秒一次
        SimpleTrigger trigger3 = new SimpleTrigger("trigger3", null, startTime
                .getTime(), null, 1, 15L * 1000L);
        trigger3.setPriority(10);
        trigger3.setJobName("propJob");
        // 安排工作计划
        scheduler.scheduleJob(job, trigger1);
        scheduler.scheduleJob(trigger2);
        scheduler.scheduleJob(trigger3);
        // 任务开始
        scheduler.start();
        // 休息30秒
        Thread.sleep(30L * 1000L);
        // 关闭
        scheduler.shutdown();
    }

    public static void main(String[] args)
    {
        PriorityDemo priorityDemo = new PriorityDemo();
        try
        {
            priorityDemo.run();
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

}

输出结果:
2008-5-9 10:45:13 org.quartz.core.SchedulerSignalerImpl <init>
信息: Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
2008-5-9 10:45:13 org.quartz.core.QuartzScheduler <init>
信息: Quartz Scheduler v.1.6.1-RC1 created.
2008-5-9 10:45:13 org.quartz.simpl.RAMJobStore initialize
信息: RAMJobStore initialized.
2008-5-9 10:45:13 org.quartz.impl.StdSchedulerFactory instantiate
信息: Quartz scheduler 'PriorityDemoScheduler' initialized from the specified file : 'src/com/quartz.properties'
2008-5-9 10:45:13 org.quartz.impl.StdSchedulerFactory instantiate
信息: Quartz scheduler version: 1.6.1-RC1
2008-5-9 10:45:13 org.quartz.core.QuartzScheduler start
信息: Scheduler PriorityDemoScheduler_$_NON_CLUSTERED started.
2008-5-9 10:45:18 com.PropJob execute
信息: job is begin:trigger3
2008-5-9 10:45:18 com.PropJob execute
信息: job is begin:trigger2
2008-5-9 10:45:18 com.PropJob execute
信息: job is begin:trigger1
begin:::::
begin:::::
begin:::::
2008-5-9 10:45:23 com.PropJob execute
信息: job is begin:trigger1
begin:::::
2008-5-9 10:45:28 com.PropJob execute
信息: job is begin:trigger2
begin:::::
begin:::::
2008-5-9 10:45:33 com.PropJob execute
信息: job is begin:trigger3
2008-5-9 10:45:43 org.quartz.core.QuartzScheduler shutdown
信息: Scheduler PriorityDemoScheduler_$_NON_CLUSTERED shutting down.
2008-5-9 10:45:43 org.quartz.core.QuartzScheduler standby
信息: Scheduler PriorityDemoScheduler_$_NON_CLUSTERED paused.
2008-5-9 10:45:43 org.quartz.core.QuartzScheduler shutdown
信息: Scheduler PriorityDemoScheduler_$_NON_CLUSTERED shutdown complete.


我们的属性文件已经被正确读取.
有人可能会对
org.quartz.scheduler.instanceName=PriorityExampleScheduler
产生疑问,PriorityDemoScheduler这个类是不存在的,
其实你只要在你的job类后面加上Scheduler就可以了.

々上善若水々 2008-05-09 10:51 发表评论
]]>Quartz实现自己的SchdulerListenerhttp://www.blogjava.net/supercrsky/articles/199423.html々上善若水々々上善若水々Fri, 09 May 2008 02:06:00 GMThttp://www.blogjava.net/supercrsky/articles/199423.htmlhttp://www.blogjava.net/supercrsky/comments/199423.htmlhttp://www.blogjava.net/supercrsky/articles/199423.html#Feedback0http://www.blogjava.net/supercrsky/comments/commentRss/199423.htmlhttp://www.blogjava.net/supercrsky/services/trackbacks/199423.htmlpackage com;

import org.quartz.SchedulerException;
import org.quartz.SchedulerListener;
import org.quartz.Trigger;

/**
 * 实现自己的Scheduler监听器
 * 
 * @author zdw
 * 
 */
public class MySchedulerListener implements SchedulerListener
{
    /**
     * 当一个JobDetail被scheduler的时候执行
     */
    public void jobScheduled(Trigger trigger)
    {
        System.out.println("jobSchedulerd fire:" + trigger.getName());
    }

    /**
     * 当一个JobDetail被排除在scheduler之外的时候执行
     */
    public void jobUnscheduled(String triggerName, String triggerGroup)
    {
        System.out.println("jobUnschedulerd fire:" + triggerName + "  ,"
                + triggerGroup);
    }

    /**
     * 当Trigger被暂停的时候执行
     */
    public void jobsPaused(String triggerName, String triggerGroup)
    {
        System.out.println("jobPaused fire:" + triggerName + " ,"
                + triggerGroup);
    }

    /**
     * 当Trigger被解除暂停的时候执行
     */
    public void jobsResumed(String triggerName, String triggerGroup)