Sauvegarde et restauration simples pour la base de données mysql à partir de Java

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

(J'espère que cela résoudra vos problèmes. Il m'a fallu une journée pour tout comprendre et les mettre en œuvre correctement)

Méthode de 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 de 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());
        }

    }