为什么执行JAVA程序时，会出现Exception in thread"main" java.lang.NoClassDefFoundError的错？...

最近有客户报障数据库SQL2000无法更改sa的密码，总是提示错误2812:未能找到存储过程'sp_password'，下面是修复方法，

使用Windows集成验证登录数据库查询分析器，如下执行语句

use master

点击执行GO

--检查xp_cmdshell是否被篡改

select * from master..syscomments where object_name(id)='xp_cmdshell' and text<>'xplog70.dll'

点击执行GO

--检查其他存储过程是否被篡改

select object_name(id), * from master..syscomments where object_name(id) in

('xp_getfiledetails','xp_availablemedia','xp_dirtree','xp_fixeddrives','xp_s

ubdirs',

'xp_fileexist','xp_get_tape_devices','sp_MSgetversion','xp_enumdsn','xp_regr

ead','xp_regwrite','xp_regdeletevalue',

'xp_regaddmultistring','xp_regremovemultistring','xp_regenumkeys','xp_regenu

mvalues','xp_regdeletekey','xp_instance_regread',

'xp_instance_regwrite','xp_instance_regdeletevalue','xp_instance_regaddmulti

string','xp_instance_regremovemultistring',

'xp_instance_regenumkeys','xp_instance_regenumvalues') and text <>N'xpstar.dll'

点击执行GO

--发现xp_cmdshell被篡改，执行下面语句改回来

drop procedure xp_cmdshell

点击执行GO

exec sp_addextendedproc N'xp_cmdshell', N'xplog70.dll'

点击执行GO

--然后执行下面语句验证xp_cmdshell是否正确

xp_cmdshell 'dir c:\'

--如果该语句异常，还有可能sql server服务的启用账户（一般情况下是system）没有

访问system32\cmd.exe文件的权限，加上权限即可

--发现其他存储过程被篡改，执行下面语句

drop procedure 存储过程名称

点击执行GO

exec sp_addextendedproc N'存储过程名称', N'xpstar.dll'

--如果sp_password过程也被修改通过以下方法更新

use master

点击执行GO

sp_configure 'allow updates',1

点击执行GO

reconfigure with override

点击执行GO

drop procedure sp_password

--找一个正确有过程代码,创建改密码过程.

create procedure sp_password

@old sysname = NULL, -- the old (current) password

@new sysname, -- the new password

@loginame sysname = NULL -- user to change password on

as

-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --

set nocount on

declare @self int

select @self = CASE WHEN @loginame is null THEN 1 ELSE 2 END

-- RESOLVE LOGIN NAME

if @loginame is null

select @loginame = suser_sname()

-- CHECK PERMISSIONS (SecurityAdmin per Richard Waymire) --

IF (not is_srvrolemember('securityadmin') = 1)

AND not @self = 1

begin

dbcc auditevent (107, @self, 0, @loginame, NULL, NULL, NULL)

raiserror(15210,-1,-1)

return (1)

end

ELSE

begin

dbcc auditevent (107, @self, 1, @loginame, NULL, NULL, NULL)

end

-- DISALLOW USER TRANSACTION --

set implicit_transactions off

IF (@@trancount > 0)

begin

raiserror(15002,-1,-1,'sp_password')

return (1)

end

-- RESOLVE LOGIN NAME (disallows nt names)

if not exists (select * from master.dbo.syslogins where

loginname = @loginame and isntname = 0)

begin

raiserror(15007,-1,-1,@loginame)

return (1)

end

-- IF non-SYSADMIN ATTEMPTING CHANGE TO SYSADMIN, REQUIRE PASSWORD (218078) --

if (@self <> 1 AND is_srvrolemember('sysadmin') = 0 AND exists

(SELECT * FROM master.dbo.syslogins WHERE loginname = @loginame and isntname = 0

AND sysadmin = 1) )

SELECT @self = 1

-- CHECK OLD PASSWORD IF NEEDED --

if (@self = 1 or @old is not null)

if not exists (select * from master.dbo.sysxlogins

where srvid IS NULL and

name = @loginame and

( (@old is null and password is null) or

(pwdcompare(@old, password, (CASE WHEN xstatus&2048 = 2048 THEN 1 ELSE 0 END)) = 1) ) )

begin

raiserror(15211,-1,-1)

return (1)

end

-- CHANGE THE PASSWORD --

update master.dbo.sysxlogins

set password = convert(varbinary(256), pwdencrypt(@new)), xdate2 = getdate(), xstatus = xstatus & (~2048)

where name = @loginame and srvid IS NULL

-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE SYSLOGINS CHANGE --

exec('use master grant all to null')

-- FINALIZATION: RETURN SUCCESS/FAILURE --

if @@error <> 0

return (1)

raiserror(15478,-1,-1)

return (0) -- sp_password

点击执行GO

OK 完事，测试发现可以修改sa密码了！