* @(#)DatabaseBackup.java Apr 23, 2009
*
* Copyright (c) 2009 by jadmin. All Rights Reserved.
*/
package util.dbak;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
/**
* MySQL数据库的备份与恢复
* 缺陷:可能会被杀毒软件拦截
* @version $Revision: 1.0 Apr 23, 2009 11:44:00 PM $
*/
public class DatabaseBackup {
/** MySQL安装目录的Bin目录的绝对路径 */
private String mysqlBinPath;
/** 访问MySQL数据库的用户名 */
private String username;
/** 访问MySQL数据库的密码 */
private String password;
public String getMysqlBinPath() {
return mysqlBinPath;
}
public void setMysqlBinPath(String mysqlBinPath) {
this.mysqlBinPath = mysqlBinPath;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public DatabaseBackup() {
super();
}
public DatabaseBackup(String mysqlBinPath, String username, String password) {
super();
if (!mysqlBinPath.endsWith(File.separator)) {
mysqlBinPath = mysqlBinPath + File.separator;
}
this.mysqlBinPath = mysqlBinPath;
this.username = username;
this.password = password;
}
/**
* 备份数据库
*
* @param output 输出流
* @param dbname 要备份的数据库名
*/
public void backup(OutputStream output, String dbname) {
String command = "cmd /c " + mysqlBinPath + "mysqldump -u" + username + " -p" + password + " --set-charset=utf8 "
+ dbname;
System.out.println(command);
PrintWriter p = null;
BufferedReader reader = null;
try {
p = new PrintWriter(new OutputStreamWriter(output, "utf8"));
Process process = Runtime.getRuntime().exec(command);
InputStreamReader inputStreamReader = new InputStreamReader(process.getInputStream(), "utf8");
reader = new BufferedReader(inputStreamReader);
String line = null;
while ((line = reader.readLine()) != null) {
p.println(line);
}
p.flush();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (reader != null) {
reader.close();
}
if (p != null) {
p.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 备份数据库,如果指定路径的文件不存在会自动生成
*
* @param dest 备份文件的路径
* @param dbname 要备份的数据库
*/
public void backup(String dest, String dbname) {
try {
OutputStream out = new FileOutputStream(dest);
backup(out, dbname);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
/**
* 恢复数据库
*
* @param input 输入流
* @param dbname 数据库名
*/
public void restore(InputStream input, String dbname) {
String command = "cmd /c " + mysqlBinPath + "mysql -u" + username + " -p" + password + " " + dbname;
try {
Process process = Runtime.getRuntime().exec(command);
OutputStream out = process.getOutputStream();
String line = null;
String outStr = null;
StringBuffer sb = new StringBuffer("");
BufferedReader br = new BufferedReader(new InputStreamReader(input, "utf8"));
while ((line = br.readLine()) != null) {
sb.append(line + "rn");
}
outStr = sb.toString();
OutputStreamWriter writer = new OutputStreamWriter(out, "utf8");
writer.write(outStr);
writer.flush();
out.close();
br.close();
writer.close();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 恢复数据库
*
* @param dest 备份文件的路径
* @param dbname 数据库名
*/
public void restore(String dest, String dbname) {
try {
InputStream input = new FileInputStream(dest);
restore(input, dbname);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
DatabaseBackup bak = new DatabaseBackup("C:/MySQL/UTF8/bin", "root", "root");
bak.restore("c:/t.sql", "ttk");
}
}
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