数据库备份，github 有项目
1.// 数据库备份(1-4)
参数:主机ip，mysql数据库账户信息，同步出sql文件保存路径。文件名，数据库名
public static boolean exportDatabaseTool(String hostIP, String userName, String password, String savePath,
String fileName, String databaseName) throws InterruptedException {
File saveFile = new File(savePath);
if (!saveFile.exists()) {// 如果目录不存在
saveFile.mkdirs();// 创建文件夹
}
if (!savePath.endsWith(File.separator)) {
savePath = savePath + File.separator;
}
PrintWriter printWriter = null;
BufferedReader bufferedReader = null;
try {
printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(savePath + fileName), "utf8"));
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("mysqldump").append(" --opt").append(" -h").append(hostIP);
stringBuilder.append(" --user=").append(userName).append(" --password=").append(password)
.append(" --lock-all-tables=true");
stringBuilder.append(" --result-file=").append(savePath + fileName).append(" --default-character-set=utf8 ")
.append(databaseName);
Process process = Runtime.getRuntime().exec(stringBuilder.toString());
InputStreamReader inputStreamReader = new InputStreamReader(process.getInputStream(), "utf8");
bufferedReader = new BufferedReader(inputStreamReader);
String line;
while ((line = bufferedReader.readLine()) != null) {
printWriter.println(line);
}
printWriter.flush();
if (process.waitFor() == 0) {// 0 表示线程正常终止。
return true;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (bufferedReader != null) {
bufferedReader.close();
}
if (printWriter != null) {
printWriter.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return false;
}
2.// 数据库恢复
参数：sql文件存放位置
public static void recover(String path) throws IOException {
Runtime runtime = Runtime.getRuntime();
// 恢复 到数据库的账户信息
Process process = runtime.exec("mysql -h 192.168.1.165 -u root -proot --default-character-set=utf8 aaaaaa");
OutputStream outputStream = process.getOutputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(path)));
String str = null;
StringBuffer sb = new StringBuffer();
while ((str = br.readLine()) != null) {
sb.append(str + "\r\n");
}
str = sb.toString();
System.out.println(str);
OutputStreamWriter writer = new OutputStreamWriter(outputStream, "utf-8");
writer.write(str);
writer.flush();
outputStream.close();
br.close();
writer.close();
}
3.// 数据库同步操作
public void databaseBackup() throws IOException {
try {
// 备份
exportDatabaseTool("127.0.0.1", "root", "root", "D:/backupDatabase", "qinmei.sql", "qinmei");
// 恢复
recover("D:/backupDatabase/qinmei.sql");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
4.// 定时操作（多久备份一次）
public void run(){
Timer timer = new Timer(true);
timer.schedule(
new java.util.TimerTask() {
public void run(){
try {
databaseBackup();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}, 0, 1 * 60 * 1000);
}
5.// 监听器，项目启动时执行自动备份
public class TaskManager implements ServletContextListener {
/**
* 每天的毫秒数
*/
public static final long PERIOD_DAY = 10;
/**
* 一周内的毫秒数
*/
public static final long PERIOD_WEEK = PERIOD_DAY * 7;
/**
* 无延迟
*/
public static final long NO_DELAY = 0;
/**
* 定时器
*/
private Timer timer;
MySQLDatabaseController databaseController = new MySQLDatabaseController();
/**
* 在Web应用启动时初始化任务
*/
public void contextInitialized(ServletContextEvent event) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 17); // 控制时
calendar.set(Calendar.MINUTE, 10); // 控制分
calendar.set(Calendar.SECOND, 0); // 控制秒
Date date = calendar.getTime();
// 定义定时器
timer = new Timer("数据库表备份", true);
// 启动备份任务,参数一是某个定时类，包含run 方法,自动执行 run 方法
timer.schedule(databaseController, date);
}
/**
* 在Web应用结束时停止任务
*/
public void contextDestroyed(ServletContextEvent event) {
timer.cancel(); // 定时器销毁
}
}
6.// web.xml 配置监听器
<listener>
<listener-class>com.qinmei.controller.TaskManager</listener-class>
<listener>
