CSS实现水平及垂直居中

[不指定 2015/01/17 11:30 | by 吕进 | Via CSDN ]
在处理网页时,有时需要实现body垂直居中,用CSS的实现代码:
<style type="text/css">
.body{
width:50%;  //..宽度可修改为绝对值..//
height:50%;
position: absolute;
overflow: auto;
margin: auto;
top: 0;
bottom: 0;
left:0;
right:0;
}
</style>

MySQL批量删除指定前缀表

[不指定 2014/08/29 19:18 | by 吕进 | Via mysql ]
MySQL批量删除指定前缀表
Select CONCAT( 'drop table ', table_name, ';' ) FROM information_schema.tables Where table_name LIKE 'dede_%';

"dede"为要删除的表前缀,执行此SQL语句后会生成一串SQL语句,必须再执行生成的这些SQL语句才能真正执行删除操作。
另外一个就是批量修改表名:
Select CONCAT( 'ALTER TABLE ', table_name, 'RENAME TO ', table_name,';' ) FROM information_schema.tables Where table_name LIKE 'dede_%';

以上都必须首先在服务器 "localhost" 运行 SQL 查询,然后在对应的数据库下运行 SQL 查询。
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Excel宏代码:密码破解

[不指定 2014/07/05 10:07 | by 吕进 | Via 本站原创 ]
忘记对EXCEL加密的密码怎么办?可以用以下宏代码解决。
注意:破解后的文件需另存为——
Public Sub 工作表保护密码破解()
Const DBLSPACE As String = vbNewLine & vbNewLine
Const AUTHORS As String = DBLSPACE & vbNewLine & _
"作者:McCormick   JE McGimpsey "
Const HEADER As String = "工作表保护密码破解"
Const VERSION As String = DBLSPACE & "版本 Version 1.1.1"
Const REPBACK As String = DBLSPACE & ""
Const ZHENGLI As String = DBLSPACE & "JOBSH整理"
Const ALLCLEAR As String = DBLSPACE & "该工作簿中的工作表密码保护已全部解除!!" & DBLSPACE & "请记得另保存" _
& DBLSPACE & "注意:不要用在不当地方!"
Const MSGNOPWORDS1 As String = "该文件工作表中没有加密"
Const MSGNOPWORDS2 As String = "该文件工作表中没有加密2"
Const MSGTAKETIME As String = "解密需花费一定时间,请耐心等候!" & DBLSPACE & "按确定开始破解!"
Const MSGPWORDFOUND1 As String = "密码重新组合为:" & DBLSPACE & "$$" & DBLSPACE & _
"如果该文件工作表有不同密码,将搜索下一组密码并修改清除"
Const MSGPWORDFOUND2 As String = "密码重新组合为:" & DBLSPACE & "$$" & DBLSPACE & _
"如果该文件工作表有不同密码,将搜索下一组密码并解除"
Const MSGONLYONE As String = "确保为唯一的?"
Dim w1 As Worksheet, w2 As Worksheet
Dim i As Integer, j As Integer, k As Integer, l As Integer
Dim m As Integer, n As Integer, i1 As Integer, i2 As Integer
Dim i3 As Integer, i4 As Integer, i5 As Integer, i6 As Integer
Dim PWord1 As String
Dim ShTag As Boolean, WinTag As Boolean
Application.ScreenUpdating = False
With ActiveWorkbook
WinTag = .ProtectStructure Or .ProtectWindows
End With
ShTag = False
For Each w1 In Worksheets
ShTag = ShTag Or w1.ProtectContents
Next w1
If Not ShTag And Not WinTag Then
MsgBox MSGNOPWORDS1, vbInformation, HEADER
Exit Sub
End If
MsgBox MSGTAKETIME, vbInformation, HEADER
If Not WinTag Then
Else
On Error Resume Next
Do 'dummy do loop
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
With ActiveWorkbook
.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If .ProtectStructure = False And _
.ProtectWindows = False Then
PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
MsgBox Application.Substitute(MSGPWORDFOUND1, _
"$$", PWord1), vbInformation, HEADER
Exit Do 'Bypass all for...nexts
End If
End With
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
Loop Until True
On Error GoTo 0
End If
If WinTag And Not ShTag Then
MsgBox MSGONLYONE, vbInformation, HEADER
Exit Sub
End If
On Error Resume Next
For Each w1 In Worksheets
'Attempt clearance with PWord1
w1.Unprotect PWord1
Next w1
On Error GoTo 0
ShTag = False
For Each w1 In Worksheets
'Checks for all clear ShTag triggered to 1 if not.
ShTag = ShTag Or w1.ProtectContents
Next w1
If ShTag Then
For Each w1 In Worksheets
With w1
If .ProtectContents Then
On Error Resume Next
Do 'Dummy do loop
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If Not .ProtectContents Then
PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _
Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
MsgBox Application.Substitute(MSGPWORDFOUND2, _
"$$", PWord1), vbInformation, HEADER
'leverage finding Pword by trying on other sheets
For Each w2 In Worksheets
w2.Unprotect PWord1
Next w2
Exit Do 'Bypass all for...nexts
End If
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
Loop Until True
On Error GoTo 0
End If
End With
Next w1
End If
MsgBox ALLCLEAR & AUTHORS & VERSION & REPBACK & ZHENGLI, vbInformation, HEADER
End Sub

MYSQL最后添加汇总行

[不指定 2014/06/08 10:43 | by 吕进 | Via 本站原创 ]
数据表结构:

--
-- 表的结构 `ceshi`
--

CREATE TABLE IF NOT EXISTS `ceshi` (
  `id` int(5) NOT NULL auto_increment,
  `income` decimal(9,2) NOT NULL,
  `spending` decimal(9,2) NOT NULL,
  `date` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=10 ;

如图:
点击在新窗口中浏览此图片点击在新窗口中浏览此图片

假设要对income(收入字段)和spending(支出字段)汇总,语句如下:
select id,income,spending,date from ceshi
union all
select "Total",sum(income),sum(spending),"" from (
select id,income,spending,date from ceshi) a

语句中最后的“a”相对于严重符号,但必须有,否则无效。
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网页中镶如pdf文件的方法

[不指定 2013/10/09 13:09 | by 吕进 | Via 本站原创 ]
方法一,使用object:
<object type="application/pdf" data="attachment/G38.pdf" width="100%" height="100%"></object>

方法二,使用embed:
<embed src="attachment/G38.pdf" width="600" height="600"></embed>

方法三,综合使用:
<object classid="clsid:CA8A9780-280D-11CF-A24D-444553540000" width="100%" height="100%" border="0"><!--IE-->
      <param name="_Version" value="65539">
      <param name="_ExtentX" value="20108">
      <param name="_ExtentY" value="10866">
      <param name="_StockProps" value="0">
      <param name="SRC" value="attachment/G38.pdf">
<embed src="attachment/G38.pdf" width="100%" height="600" href="attachment/G38.pdf"></embed><!--FF-->
</object>
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