java mysql自动备份_java定时备份数据之二_MySQL
以mysql為例：
BackupDb.java數(shù)據(jù)庫備份類：
public class BackupDb {
public static boolean sqlDump(String cmd,String filePath){
boolean falg = false;
try {
Runtime run = Runtime.getRuntime();
Process p = run.exec(cmd);
InputStream is = p.getInputStream();// 控制臺的輸出信息作為輸入流
InputStreamReader isr = new InputStreamReader(is,"UTF-8");//設置輸入流編碼格式
BufferedReader br = new BufferedReader(isr);
//將控制臺輸入信息寫入到文件輸出流中
FileOutputStream fos = new FileOutputStream(filePath);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos,"UTF-8"));
String temp = null;
while( (temp = br.readLine()) !=null){
bw.write(temp);
bw.newLine();
}
bw.flush();
bw.close();
br.close();
falg = true;
System.out.println("/* Dump SQL File "+filePath+" OK! */");
} catch (IOException e) {
throw new RuntimeException("請將mysql命令添加到path中！",e);
}
return falg;
}
}
pickTask.java類 定時任務類
public class PickTask {
private Timer timer;
public PickTask() {
timer = new Timer();
}
public 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);
BackupDb bdb = new BackupDb();
// 設定備份時間
if (beginTime.equals("17:51")) {
try {
Date date2 = new Date();
SimpleDateFormat sdff = new SimpleDateFormat("yyyyMMddHHmmss");
File file = new File("d://", sdff.format(date2)+".sql");
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
//備份 C:/Program Files (x86)/MySQL/MySQL Server 5.5/bin 指mysql安裝路徑下面的bin文件夾
bdb.sqlDump("C:/Program Files (x86)/MySQL/MySQL Server 5.5/bin/mysqldump -uroot -p123 databasename",file.toString());
System.out.println("備份成功");
String dbName = file.toString(); // 取出備份的文件名字
if (file.exists()){
System.out.println("備份成功");
}else{
System.out.println("備份未成功");
//在備份未成功的情況下重新備份
new PickTask().start(1, 60); //隔60秒執(zhí)行一次
}
} catch (FileNotFoundException e) {
System.out.println("can not find the file");
} catch (IOException e) {
e.printStackTrace();
}
}else{
//System.out.println("時間還不到呢，不要著急哦！");
}
}
};
public void start(int delay, int internal) {
timer.schedule(task, delay * 1000, internal * 1000);
}
}
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