mysql每天23:00自动备份
public class DatabaseBackup {
/**
*
* @param dbdir mysql数据库安装路径
* @param dbname 数据库的名称
* @param backdir 备份的目录
*/
public static void backup(String dbdir, String dbname, String backdir) {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy_MM_dd_HHmmss");
String currentTime = dateFormat.format(calendar.getTime());
try {
long startTime = System.currentTimeMillis();
Runtime rt = Runtime.getRuntime();
Process child = rt
.exec(dbdir + "/bin/mysqldump --default-character-set=utf8 -uroot -p123456 " + dbname);
InputStream in = child.getInputStream();
InputStreamReader xx = new InputStreamReader(in, "utf8");
FileOutputStream fout = new FileOutputStream(new File(backdir, dbname + "_" + currentTime + ".bak"));
OutputStreamWriter writer = new OutputStreamWriter(fout, "utf8");
dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
writer.write("-- Dump by Microsoul at " + dateFormat.format(calendar.getTime()) + "\r\n");
String inStr;
BufferedReader br = new BufferedReader(xx);
// 这样实时写入文件很重要,网上有很多是将读取的存入字符串中,最后再写成文件,这样会导致Java的堆栈内存溢出。
while ((inStr = br.readLine()) != null) {
writer.write(inStr);
writer.write("\r\n");
}
writer.write("\r\n-- Use " + (System.currentTimeMillis() - startTime) + "ms\r\n");
writer.flush();
in.close();
xx.close();
br.close();
writer.close();
fout.close();
} catch (Exception e) {
PrintStream print = null;
try {