Simple Backup and Restore pour la base de données mysql de Java

Comment sauvegarder une base de données mysql à partir d'un code java tels que:

  1. Économisant chemin est allouée dynamiquement.
  2. Des espaces dans le Chemin d'accès de ne pas créer de problèmes.
  3. Chemin d'accès est généré à l'aide de l'exécution de fichier jar.
  4. DBname,DBusername ou DBpass sont dynamiquement alloué.
  5. La création d'une institution spécialisée dossier pour enregistrer le fichier de sauvegarde.

source d'informationauteur chettyharish

  1. 20

    Remarque: Les codes donnés ci-dessous sont un moyen de résoudre le problème n'est probablement pas la meilleure méthode. Tout est modifiable à l'intérieur du code. Si vous n'avez pas de mysql dans les variables d'environnement, ajoutez le chemin d'accès avant de mysqldump et mysql (par exemple, Pour XAMPP, C:\xampp\mysql\bin\mysqldump)

    (Espoir, cela permettra de résoudre votre problèmes. M'a pris une journée complètement la figure de tout et de mettre en œuvre correctement)

    Méthode pour la Sauvegarde:

    public static void Backupdbtosql() {
try {
/*NOTE: Getting path to the Jar file being executed*/
/*NOTE: YourImplementingClass-> replace with the class executing the code*/
CodeSource codeSource = YourImplementingClass.class.getProtectionDomain().getCodeSource();
File jarFile = new File(codeSource.getLocation().toURI().getPath());
String jarDir = jarFile.getParentFile().getPath();
/*NOTE: Creating Database Constraints*/
String dbName = "YourDBName";
String dbUser = "YourUserName";
String dbPass = "YourUserPassword";
/*NOTE: Creating Path Constraints for folder saving*/
/*NOTE: Here the backup folder is created for saving inside it*/
String folderPath = jarDir + "\\backup";
/*NOTE: Creating Folder if it does not exist*/
File f1 = new File(folderPath);
f1.mkdir();
/*NOTE: Creating Path Constraints for backup saving*/
/*NOTE: Here the backup is saved in a folder called backup with the name backup.sql*/
String savePath = "\"" + jarDir + "\\backup\\" + "backup.sql\"";
/*NOTE: Used to create a cmd command*/
String executeCmd = "mysqldump -u" + dbUser + " -p" + dbPass + " --database " + dbName + " -r " + savePath;
/*NOTE: Executing the command here*/
Process runtimeProcess = Runtime.getRuntime().exec(executeCmd);
int processComplete = runtimeProcess.waitFor();
/*NOTE: processComplete=0 if correctly executed, will contain other values if not*/
if (processComplete == 0) {
System.out.println("Backup Complete");
} else {
System.out.println("Backup Failure");
}
} catch (URISyntaxException | IOException | InterruptedException ex) {
JOptionPane.showMessageDialog(null, "Error at Backuprestore" + ex.getMessage());
}
}

    Méthode pour la Restauration:

    public static void Restoredbfromsql(String s) {
try {
/*NOTE: String s is the mysql file name including the .sql in its name*/
/*NOTE: Getting path to the Jar file being executed*/
/*NOTE: YourImplementingClass-> replace with the class executing the code*/
CodeSource codeSource = YourImplementingClass.class.getProtectionDomain().getCodeSource();
File jarFile = new File(codeSource.getLocation().toURI().getPath());
String jarDir = jarFile.getParentFile().getPath();
/*NOTE: Creating Database Constraints*/
String dbName = "YourDBName";
String dbUser = "YourUserName";
String dbPass = "YourUserPassword";
/*NOTE: Creating Path Constraints for restoring*/
String restorePath = jarDir + "\\backup" + "\\" + s;
/*NOTE: Used to create a cmd command*/
/*NOTE: Do not create a single large string, this will cause buffer locking, use string array*/
String[] executeCmd = new String[]{"mysql", dbName, "-u" + dbUser, "-p" + dbPass, "-e", " source " + restorePath};
/*NOTE: processComplete=0 if correctly executed, will contain other values if not*/
Process runtimeProcess = Runtime.getRuntime().exec(executeCmd);
int processComplete = runtimeProcess.waitFor();
/*NOTE: processComplete=0 if correctly executed, will contain other values if not*/
if (processComplete == 0) {
JOptionPane.showMessageDialog(null, "Successfully restored from SQL : " + s);
} else {
JOptionPane.showMessageDialog(null, "Error at restoring");
}
} catch (URISyntaxException | IOException | InterruptedException | HeadlessException ex) {
JOptionPane.showMessageDialog(null, "Error at Restoredbfromsql" + ex.getMessage());
}
}
  2. 3

    Si Hibernate est configuré correctement, c'est le gâteau:

    Session session = HibernateUtil.getSessionFactory().openSession();
//for every table, have the bean implement Serializable and use the next 4 lines
List <TblBean> tblCollection = session.createCriteria(TblBean.class).list();
FileOutputStream backup = new FileOutputStream("backupOf"+TblBean.getClass().getName()+".dat");
ObjectOutputStream backupWriter = new ObjectOutputStream(backup);
backupWriter.write(tblCollection);
  3. 0
    public static String getData(String host, String port, String user, String password, String db,String table) throws Exception {
//an "C:/xampp/mysql/bin/mysqldump" ---- location ito han mysqldump
Process run = Runtime.getRuntime().exec(
"C:/xampp/mysql/bin/mysqldump --host="  + host + " --port=" + port + 
" --user=" + user + " --password=" + password +
" --compact --databases --add-drop-table --complete-insert --extended-insert " +
"--skip-comments --skip-triggers "+ db+" --tables "+table);
InputStream in = run.getInputStream(); 
BufferedReader br = new BufferedReader(new InputStreamReader(in));
StringBuffer temp = new StringBuffer();
int count;
char[] cbuf = new char[BUFFER];
while ((count = br.read(cbuf, 0, BUFFER)) != -1)
temp.append(cbuf, 0, count);
br.close();
in.close();
return temp.toString();
}