/**
操作数据库
*/
public class BackupDb {
public String backup() throws IOException{ String user = "root"; //数据库的用户名 String password = "admin";//数据库的密码 String database = "hrtweb";//要备份的数据库名 Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); String filepath = "d:\\"+sdf.format(date)+".sql"; File file = new File("d:\\",sdf.format(date)+".sql"); if(!file.exists()){ file.createNewFile(); } String stmt1 = "mysqldump " + database +" -h 127.0.0.1 "+ " -u " + user + " -p" + password + " --default-character-set=gbk --result-file=" + filepath; try { Runtime.getRuntime().exec(stmt1); System.out.println("已经保存到 " + filepath + " 中"); } catch (IOException e) { e.printStackTrace(); } return filepath; } }/**
创建定时器
*/
public class PickTask {
private Timer timer = new Timer(); private TimerTask task = new TimerTask() { public void run() { Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String beginDate = sdf.format(date); String beginTime = beginDate.substring(11, 16); System.out.println("开始时间："+beginDate); BackupDb bdb = new BackupDb(); // 设定备份时间 if (beginTime.equals("17:09")) { try { bdb.backup(); // 执行文件备份 String dbName = bdb.backup().toString(); // 取出备份的文件名字 String path = "d:\\"; int nameNo = dbName.lastIndexOf("\\"); //判断文件是否存在，如果存在，则备份成功，如果不存在则备份不成功需要重新备份 File file = new File(path, dbName.substring(nameNo + 1,dbName.length())); if (file.exists()){ System.out.println("备份成功"); }else{ System.out.println("备份失败，重新备份"); //在备份未成功的情况下重新备份 new PickTask().start(1, 1); } } catch (FileNotFoundException e) { System.out.println("can not find the file"); } catch (IOException e) { e.printStackTrace(); } }else{ System.out.println("时间还不到呢，不要着急哦！"); } } }; //start 方法不能少，主要是schedule方法 public void start(int delay, int internal) { timer.schedule(task, delay * 1000, internal * 1000); }}/**
测试类，执行定时备份指令
*/
public class TimerUse {
public static void main(String[] args) { PickTask picktask = new PickTask(); picktask.start(1, 60); // 每60秒执行一次 }}