定时执行任务-Java WEB程序【绝对好用】
指定每一天某时某分执行某项任务的功能。
/***第一个类定时器任务类***/
package com.wisdom.smsframe.logic.smsend;
import java.util.Date;
import java.util.Timer;
import java.util.Calendar;
import java.io.IOException;
import com.wisdom.base.ConfigurationFile;
/**
* Created on 2013-8-13
* Title: J2EE程序_[定时任务管理器]_[公共类]
* Description: [定时器]
* Copyright: xuqb (c) 2013
* Company: xuqb工作室
* @developer xuqb[[email protected]]
* @version 1.0
*/
public class TimerManager
{
/**
* Description:[时间间隔，每天执行次数（每24小时执行一次）]
* Value:PERIOD_DAY
*/
private static final long PERIOD_DAY = 24 * 60 * 60 * 1000;
/**
* Description:[时间间隔，每天执行次数（每五秒执行一次）]
* Value:PERIOD_DAY
*/
//private static final long PERIOD_DAY = 5*1000;
/**
* Description:[构造方法]
* @constructor 方法.
*/
public TimerManager()
{
//--获取配置文件中的时间
String file_path = ConfigurationFile.getConfigFilePath(); //获取位于SMS/WEB-INF/SMCS.INI配置文件路径
String commitCount = null; //配置文件中的预设小时和分钟(24小时制)
try
{
commitCount = ConfigurationFile.getProfile(file_path,
"dsrwtime", "mytimer", ""); //提取代码，例如[dsrwtime] SmsCounts=10:38
}
catch (IOException ea)
{
ea.printStackTrace();
}
String[] objtime = null;
//拆分从配置文件预设的小时和分钟；若没有，则默认零时零分执行(24小时制)
if(commitCount !=null && !"".equals(commitCount))
{
objtime = commitCount.split(":");
}
else
{
objtime = new String[2];
objtime[0]="0"; //零时(24小时制)
objtime[1]="0"; //零分(24小时制)
}
int beginHour = Integer.parseInt(objtime[0]); //开始执行小时(24小时制)
int beginMimu = Integer.parseInt(objtime[1]); //开始执行分钟(24小时制)
Calendar calendar = Calendar.getInstance();
/*** 定制每日某时:某分执行方法(24小时制) ***/
calendar.set(Calendar.HOUR_OF_DAY, beginHour); //开始执行小时(24小时制)
calendar.set(Calendar.MINUTE, beginMimu); //开始执行分钟(24小时制)
calendar.set(Calendar.SECOND, 0); //开始执行秒(24小时制)
Date date = calendar.getTime(); //第一次执行定时任务的时间
//如果第一次执行定时任务的时间 小于 当前的时间
//此时要在 第一次执行定时任务的时间 加一天，以便此任务在下个时间点执行。如果不加一天，任务会立即执行。
if (date.before(new Date()))
{
date = this.addDay(date, 0); //0代表增加0天
}
Timer timer = new Timer();
NFDFlightDataTimerTask task = new NFDFlightDataTimerTask();
//安排指定的任务在指定的时间开始进行重复的固定延迟执行。
timer.schedule(task, date, PERIOD_DAY);
}
/**
* Created on 2013-8-13
* Description: [增加或减少天数]
* @param date
* @param num
* @return
* @developer: xuqb[[email protected]]
* @update: [日期YYYY-MM-DD][更改人姓名][E-mail]
*/
public Date addDay(Date date, int num)
{
Calendar startDT = Calendar.getInstance();
startDT.setTime(date);
startDT.add(Calendar.DAY_OF_MONTH, num);
return startDT.getTime();
}
}
【注意：在web.xml文件中添加如下配置信息代码】
com.wisdom.smsframe.logic.smsend.TimerManager
/***第二个类，配合定时器引入具体业务实现类***/
package com.wisdom.smsframe.logic.smsend;
import common.Logger;
import java.util.TimerTask;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* Created on 2013-8-13
* Title: JavaWeb程序_[定时任务管理器]_[引用类]
* Description: [配合定时器引入具体业务实现类]
* Copyright: xuqb (c) 2013
* Company: xuqb工作室
* @developer xuqb[[email protected]]
* @version 1.0
*/
public class NFDFlightDataTimerTask extends TimerTask
{
/**
* Description:[字段功能描述]
* Value:log
*/
private static Logger log = Logger.getLogger(NFDFlightDataTimerTask.class);
/**
* Created on 2013-8-13
* Description: [方法功能中文描述]
* @developer: xuqb[[email protected]]
* @update: [日期YYYY-MM-DD][更改人姓名][E-mail]
*/
public void run()
{
try
{
//在这里写你要执行的内容
System.out.println("xuqb先生提示：这里编辑您的业务方法");
}
catch (Exception emz)
{
System.out.println("解析信息发生异常");
log.info("-------------解析信息发生异常--------------");
emz.printStackTrace();
}
}
/**
* Created on 2013-8-13
* Title: JavaWeb程序_[模块名称]_[说明]
* Description: [描述该类概要功能介绍]
* Copyright: xuqb (c) 2013
* Company: xuqb工作室
* @developer xuqb[[email protected]]
* @version 1.0
*/
public class NFDFlightDataTaskListener implements ServletContextListener
{
/**
* Created on 2013-8-13
* Description: [方法功能中文描述]
* @developer: xuqb[[email protected]]
* @update: [日期YYYY-MM-DD][更改人姓名][E-mail]
*/
public void contextInitialized(ServletContextEvent event)
{
new TimerManager();
}
/**
* Created on 2013-8-13
* Description: [方法功能中文描述]
* @developer: xuqb[[email protected]]
* @update: [日期YYYY-MM-DD][更改人姓名][E-mail]
*/
public void contextDestroyed(ServletContextEvent event)
{
}
}
}
/***第三个类，读取指定目录下的配置文件内容的类***/
package com.wisdom.base;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.io.File;
import java.net.URLDecoder;
/**
* 这是个配置文件操作类，用来读取和设置ini配置文件
*/
public final class ConfigurationFile
{
public static String getConfigFilePath()
{
String str_application_path = "";
try
{
String str_class_path =
ConfigurationFile.class.getClassLoader().getResource("").getPath();
if (str_class_path == null || str_class_path.trim().equals(""))
return "";
str_class_path = URLDecoder.decode(str_class_path, "UTF-8");
File class_dir = new File(str_class_path);
String str_webinfo_dir =
class_dir.getParentFile().getPath();
if (!str_webinfo_dir.endsWith(File.separator)) {
str_webinfo_dir += File.separator;
}
str_application_path= str_webinfo_dir + "smcs.ini";
System.out.println("SMCS Path:" + str_application_path);
}
catch (Exception ex)
{
}
return str_application_path;
}
/**
* 从ini配置文件中读取变量的值
* @param file 配置文件的路径
* @param section 要获取的变量所在段名称
* @param variable 要获取的变量名称
* @param defaultValue 变量名称不存在时的默认值
* @return 变量的值
* @throws IOException 抛出文件操作可能出现的io异常
*/
public static String getProfile(
String file,
String section,
String variable,
String defaultValue) throws IOException
{
String strLine, value = "";
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
boolean isInSection = false;
try
{
while ( (strLine = bufferedReader.readLine()) != null)
{
strLine = strLine.trim();
//strLine = strLine.split("[;]")[0];
Pattern p;
Matcher m;
p = Pattern.compile("\\[\\s*.*\\s*\\]");
m = p.matcher( (strLine));
if (m.matches())
{
p = Pattern.compile("\\[\\s*" + section + "\\s*\\]");
m = p.matcher(strLine);
if (m.matches())
{
isInSection = true;
}
else
{
isInSection = false;
}
}
if (isInSection == true)
{
strLine = strLine.trim();
String[] strArray = strLine.split("=");
if (strArray.length == 1)
{
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable))
{
value = "";
return value;
}
}
else if (strArray.length == 2)
{
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable))
{
value = strArray[1].trim();
return value;
}
}
else if (strArray.length > 2)
{
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable))
{
value = strLine.substring(strLine.indexOf("=") + 1).
trim();
return value;
}
}
}
}
}
finally
{
bufferedReader.close();
}
return defaultValue;
}
/**
* 修改ini配置文件中变量的值
* @param file 配置文件的路径
* @param section 要修改的变量所在段名称
* @param variable 要修改的变量名称
* @param value 变量的新值
* @throws IOException 抛出文件操作可能出现的io异常
*/
public static boolean setProfile(
String file,
String section,
String variable,
String value) throws IOException
{
String fileContent, allLine, strLine, newLine, remarkStr;
String getValue;
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
boolean isInSection = false;
fileContent = "";
try
{
while ( (allLine = bufferedReader.readLine()) != null)
{
allLine = allLine.trim();
if (allLine.split("[;]").length > 1)
remarkStr = ";" + allLine.split(";")[1];
else
remarkStr = "";
strLine = allLine.split(";")[0];
Pattern p;
Matcher m;
p = Pattern.compile("\\[\\s*.*\\s*\\]");
m = p.matcher( (strLine));
if (m.matches())
{
p = Pattern.compile("\\[\\s*" + section + "\\s*\\]");
m = p.matcher(strLine);
if (m.matches())
{
isInSection = true;
//isInSection = false;
}
}
if (isInSection == true)
{
strLine = strLine.trim();
String[] strArray = strLine.split("=");
getValue = strArray[0].trim();
if (getValue.equalsIgnoreCase(variable))
{
newLine = getValue + "=" + value;
fileContent += newLine + "\r\n";
while ( (allLine = bufferedReader.readLine()) != null)
{
fileContent += allLine + "\r\n";
}
bufferedReader.close();
BufferedWriter bufferedWriter =
new BufferedWriter(new FileWriter(file, false));
bufferedWriter.write(fileContent);
bufferedWriter.flush();
bufferedWriter.close();
return true;
}
}
fileContent += allLine + "\r\n";
}
}
catch (IOException ex)
{
throw ex;
}
finally
{
bufferedReader.close();
}
return false;
}
}
=*=*=*=*=*=*=*=*==关于配置文件的编辑说明=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
smcs.ini配置文件中写如下代码即可：
[dsrwtime]
mytimer = 15:45