java定时器

web.xml

<servlet>
    <servlet-name>CallBackServlet</servlet-name>
    <servlet-class>com.icss.fsop.osems.workspace.servlet.CallBackServlet</servlet-class>
    <load-on-startup>156</load-on-startup>
  </servlet>

<servlet-mapping>
    <servlet-name>CallBackServlet</servlet-name>
    <url-pattern>/servlet/CallBackServlet</url-pattern>
  </servlet-mapping>

public class CallBackTask extends TimerTask{

 /**
  * 执行时间控制器
  */
 public void run() {
  // TODO Auto-generated method stub
  StringBuffer sql = new StringBuffer();
  sql.append(" update tbl_os_item tblItem ")
     .append(" set tblItem.ITEMSPACE = 'issued' ")
     .append(" where sysdate - to_date(tblItem.pi_sign_time, 'yyyy-MM-dd hh24:mi:ss') >= 7 ")
     .append(" and tblItem.State = '2' ")
     .append(" and tblItem.proid in ")
     .append(" (select proid from tbl_os_project where protype != '0') ")
     .append(" and tblItem.ITEMSPACE = 'workspace' ");
  String sqlStr = sql.toString();
  Connection conn = null;
  PreparedStatement ps = null;
  try {
    conn=DBConnectionProvider.getConnection(Constants.JNDI_OSEMS);
    ps = conn.prepareStatement(sqlStr);
    ps.execute();
    //conn.commit();
    ps.close();
  } catch (Exception e) {
   // TODO: handle exception
  }finally {
   try {

    conn.close();
   } catch (Exception e) {
    // TODO: handle exception
   }

  }
  
 }

}

/**

*

*/

package com.icss.fsop.osems.workspace.servlet;

import java.util.Timer;

import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServlet;

import com.icss.core.config.Config;
import com.icss.core.config.ConfigException;
import com.icss.core.config.ConfigType;
import com.icss.fsop.osems.common.conf.Constants;
import com.icss.fsop.osems.common.util.CallBackTask;

public class CallBackServlet extends HttpServlet {
  
   Timer time = new Timer();
     CallBackTask task = new CallBackTask();
   
     public void init(ServletConfig config) {
      try
   {
    Config.addConfig(ConfigType.PROP, Constants.APP_CONFIG,"osems_env.properties");
    int initTime = Integer.parseInt(Config.getConfig(Constants.APP_CONFIG).getProperty("initTime",  "")) ;
    int intervalTime = Integer.parseInt(Config.getConfig(Constants.APP_CONFIG).getProperty("intervalTime",  "")) ;
    time.schedule(task, initTime, intervalTime);
   } catch (ConfigException e)
   {
    //do something
    e.printStackTrace();
   }
     }
     public void destroy() {
         time.cancel();
     }
}

osems_env.properties

intervalTime = 3600000
initTime = 120000