java对mssql数据库的备份和恢复
import java.sql.CallableStatement; import java.sql.Connection; import java.sql.SQLException; import java.sql.Types; import java.util.logging.Level; import java.util.logging.Logger; /** * * @author Msir */ public class BackupRestore{ /*str的值只能是backup或者restore，把该值传入存储过程作为判断是备份还是恢复*/ public void backupres(Connection conn,String str) throws SQLException{ CallableStatement st = null; st = conn.prepareCall("{call DBbackup(?,?,?,?,?,?,?)}");//存储过程 st.setInt(1, 0); st.setString(2, "D://back//llp");//不包含文件后缀名的路径 st.setInt(3, 0); st.setInt(4, 1); st.setInt(5, 0); st.setString(6, str); st.registerOutParameter(7, Types.VARCHAR); st.execute(); String out=st.getString(7); System.out.println(out); } public static void main(String[] args){ Connection conn = null; BackupRestore br=new BackupRestore(); try { conn = DB.getMsConn("localhost");//获取数据库连接，在这里对数据库llp备份和恢复，为了避免恢复出错，连接到非llp库 } catch (SQLException ex) { Logger.getLogger(BackupRestore.class.getName()).log(Level.SEVERE, null, ex); } if(conn!=null) System.out.println("已连接！"); try { br.backupres(conn, "restore"); } catch (SQLException ex) { Logger.getLogger(BackupRestore.class.getName()).log(Level.SEVERE, null, ex); } } }
java对数据库的备份和恢复要用到的数据库连接方法DB.getMsConn：
public final class DB { private static Connection access; public static Connection getMsConn(String ip) throws SQLException{ Connection conn=null; try { Class.forName("net.sourceforge.jtds.jdbc.Driver"); conn= DriverManager.getConnection("jdbc:jtds:sqlserver://" + ip + ":1433/master;user=sa;password=sa"); } catch (SQLException ex) { throw new SQLException("无法连接远程服务器！可能是由下列原因导致该错误的发生：/r/n/r/n" + "1、网络连接中断；/r/n" + "2、远程数据库已被停止服务；/r/n" + "3、数据库配置错误；/r/n" + "4、传递了错误的连接参数；/r/n" + "5、数据库结构已被破坏",ex); }catch (ClassNotFoundException ex) { HLogger.log(ex, "获取远程数据库驱动"); } return conn; } }
用到的存储过程(该存储过程由网上收集+个人修改):
CREATE PROCEDURE DBbackup
@bakequip int, -- 备份设备：磁盘&磁带
@bakpath varchar(50), -- 带全路径的备份文件名
@baktype int, -- 完全备份&增量备份
@baklog int, -- ‘0’备份日志
@bakdb int, -- ‘0’备份数据库
@kind varchar(7), --备份还是恢复
@retmsg varchar(20) out --返回信息
AS
DECLARE @DevName_data varchar(50)
DECLARE @DevName_log varchar(50)
DECLARE @db_path varchar(100)
DECLARE @log_path varchar(100)
SELECT @DevName_data =@bakpath + '.dat'
SELECT @DevName_log = @bakpath + 'log.dat'
SELECT @db_path = @bakpath + '.dat'
SELECT @log_path= @bakpath + 'log.dat'
DBCC CHECKDB(llp)
IF NOT EXISTS (SELECT * FROM sysdevices WHERE NAME=@DevName_log OR NAME=@DevName_data)
BEGIN
EXEC sp_addumpdevice 'disk', @DevName_data,@db_path
EXEC sp_addumpdevice 'disk', @DevName_log,@log_path
IF @kind='backup'
BEGIN
IF @bakequip=0
BEGIN
IF @baktype=0
BEGIN
IF @bakdb=0
BEGIN
BACKUP DATABASE llp TO DISK=@Devname_data
WITH INIT
END
IF @baklog=0
BEGIN
BACKUP LOG llp WITH NO_LOG
BACKUP LOG llp TO DISK=@DevName_log
WITH INIT,NO_TRUNCATE
END
END
ELSE BEGIN
IF @bakdb=0
BEGIN
BACKUP DATABASE llp TO DISK=@DevName_data
WITH NOINIT
END
IF @baklog=0
BEGIN
BACKUP LOG llp WITH NO_LOG
BACKUP LOG llp TO DISK=@DevName_log
WITH NOINIT,NO_TRUNCATE
END
END
END
SET @retmsg='数据库备份成功！'
END
IF @kind='restore'
BEGIN
RESTORE DATABASE llp FROM DISK=@DevName_data WITH REPLACE
SET @retmsg='恢复数据库成功！'
END
END
ELSE
BEGIN
EXEC SP_DropDevice @Devname_data
EXEC sp_dropdevice @devname_log
EXEC sp_addumpdevice 'disk', @DevName_data,@db_path
EXEC sp_addumpdevice 'disk', @DevName_log,@log_path
IF @kind='backup'
BEGIN
IF @bakequip=0
BEGIN
IF @baktype=0
BEGIN
IF @bakdb=0
BEGIN
BACKUP DATABASE llp TO DISK=@Devname_data
WITH INIT
END
IF @baklog=0
BEGIN
BACKUP LOG llp WITH NO_LOG
BACKUP LOG llp TO DISK=@DevName_log
WITH INIT,NO_TRUNCATE
END
END
ELSE BEGIN
IF @bakdb=0
BEGIN
BACKUP DATABASE llp TO DISK=@DevName_data
WITH NOINIT
END
IF @baklog=0
BEGIN
BACKUP LOG llp WITH NO_LOG
BACKUP LOG llp TO DISK=@DevName_log
WITH NOINIT,NO_TRUNCATE
END
END
END
SET @retmsg='数据库备份成功！'
END
IF @kind='restore'
BEGIN
DECLARE hCForEach CURSOR FOR
SELECT s='kill '+CAST(spid AS VARCHAR) FROM master..sysprocesses
WHERE dbid=DB_ID('llp')
EXEC sp_msforeach_worker '?'
RESTORE DATABASE llp FROM DISK=@DevName_data WITH REPLACE
SET @retmsg='恢复数据库成功！'
END
END
RETURN 0
GO