java实现mysql数据库的备份及还原
备份1：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
/**
* MySQL数据库备份
*
* @author GaoHuanjie
*/
public class MySQLDatabaseBackup {
/**
* Java代码实现MySQL数据库导出
*
* @author GaoHuanjie
* @param hostIP MySQL数据库所在服务器地址IP
* @param userName 进入数据库所需要的用户名
* @param password 进入数据库所需要的密码
* @param savePath 数据库导出文件保存路径
* @param fileName 数据库导出文件文件名
* @param databaseName 要导出的数据库名
* @return 返回true表示导出成功，否则返回false。
*/
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"));
Process process = Runtime.getRuntime().exec(" mysqldump -h" + hostIP + " -u" + userName + " -p" + password + " --set-charset=UTF8 " + databaseName);
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;
}
public static void main(String[] args){
try {
if (exportDatabaseTool("172.16.0.127", "root", "123456", "D:/backupDatabase", "2014-10-14.sql", "test")) {
System.out.println("数据库成功备份！！！");
} else {
System.out.println("数据库备份失败！！！");
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
备份2：
public static void backup() {
try {
Runtime rt = Runtime.getRuntime();
// 调用 调用mysql的安装目录的命令
Process child = rt
.exec("e:\\MySQL\\bin\\mysqldump -h localhost -uroot -p123 db_name");
// 设置导出编码为utf-8。这里必须是utf-8
// 把进程执行中的控制台输出信息写入.sql文件，即生成了备份文件。注：如果不对控制台信息进行读出，则会导致进程堵塞无法运行
InputStream in = child.getInputStream();// 控制台的输出信息作为输入流
InputStreamReader xx = new InputStreamReader(in, "utf-8");
// 设置输出流编码为utf-8。这里必须是utf-8，否则从流中读入的是乱码
String inStr;
StringBuffer sb = new StringBuffer("");
String outStr;
// 组合控制台输出信息字符串
BufferedReader br = new BufferedReader(xx);
while ((inStr = br.readLine()) != null) {
sb.append(inStr + "\r\n");
}
outStr = sb.toString();
// 要用来做导入用的sql目标文件：
FileOutputStream fout = new FileOutputStream("c:\\test.sql");
OutputStreamWriter writer = new OutputStreamWriter(fout, "utf-8");
writer.write(outStr);
writer.flush();
in.close();
xx.close();
br.close();
writer.close();
fout.close();
System.out.println("");
} catch (Exception e) {
e.printStackTrace();
}
}
还原:
public static void restore(String databaseName) {
try {
Runtime runtime = Runtime.getRuntime();
Process process = runtime
.exec("e:\\MySQL\\bin\\mysql.exe -hlocalhost -uroot -p123 --default-character-set=utf8 "
+ databaseName);
OutputStream outputStream = process.getOutputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream("C:\\test.sql"), "utf-8"));
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();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
