如何從java代碼備份mysql數據庫,從而爲MySQL數據庫還原:簡單備份,並從Java
- 它的保存路徑是動態分配的。
- Path中的空格不會產生問題。
- 使用正在執行的jar文件生成路徑。
- 動態分配DBname,DBusername或DBpass。
- 創建一個專門的文件夾來保存備份文件。
如何從java代碼備份mysql數據庫,從而爲MySQL數據庫還原:簡單備份,並從Java
注:下面給出的代碼是解決問題的一種方式,可能不是最好的方法。代碼內部的一切都是可變的。如果你在環境變量中沒有mysql,在mysqldump和mysql之前添加路徑(例如,對於XAMPP,C:\ xampp \ mysql \ bin \ mysqldump)
(希望這會解決你的問題。天完全弄清楚一切,並正確地執行它們)進行備份
方法:
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());
}
}
方法還原:
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());
}
}
你的方法'Backupdbtosql'在執行時顯示錯誤。 Backuprestore上的錯誤無法運行程序「mysqldump」; CreateProcess error = 2,系統無法找到指定的文件_ – 2016-02-18 20:21:37
我正在使用wampserver – 2016-02-18 20:23:14
由於您沒有放置mysqldump.exe的路徑,所以出現此錯誤,我遇到了同樣的錯誤,但對它進行了編碼,效果很好。對於Windows: 'String executeCmd =「C:\\ Program Files(x86)\\ MySQL \\ MySQL Workbench 6.1 CE \\ mysqldump -u」+ dbUser +「-p」+ dbPass +「--database」+ dbName +「-r」+ savePath;' 這不是一個最佳的解決方案,由於可解決的問題! 對不起,我的英語 – vLopez 2016-07-04 13:33:56
如果Hibernate配置正確,這是蛋糕:
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);
這只是爲了實現備份,它需要設置Hibernate +,你需要bean實現所有的表(可能有100個),其他代碼很簡單,易於實現新手(儘管不安全和低效) – chettyharish 2013-02-17 19:18:24
問題從「如何從java代碼備份mysql數據庫」開始。我的回答是以安全和有效的方式進行的,其他代碼沒有這樣做,正如您所指出的那樣。 – hd1 2013-02-17 19:21:16
+1不知道這是可能的,直到我看到你的答案。 – Mukus 2014-04-06 23:37:32
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();
}
嗯必須給我的codez一天,所以你嘗試過什麼? – 2013-02-17 18:59:06
其實我已經發布了代碼,以便任何人都可以訪問它。有很多人在尋找相同的問題(包括我,花了我2天)。所以這是所有需要幫助的人 – chettyharish 2013-02-17 19:01:35
夠公平的,我們會看看人們是否喜歡它。 – 2013-02-17 22:37:30