批处理怎么删除TXT文本中的指定行？

wangl

小弟不才~在问个问题

X.TXT中有N行 例如:

1
2
3
4
.....
99999  我想删除前xxx行

怎么写~谢谢!

Batcher

1. more +100 1.txt >2.txt

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wangl

原帖由 Batcher 于 2010-5-30 10:58 发表
more +100 1.txt >2.txt

这句代码可以删除前XXX行

可是保留下来的文本不完整 后面的就卡那不动了 可能太大了(4M)

CUer

1. gawk "NR>=100" 1.txt >2.txt

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523066680

上次好像有见到讨论说  文本超过一定长度后命令不能读完。

CUer

1. sed "100,$!d" 1.txt >2.txt

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broly

for /f "skip=XXX" %%i in ('type 1.txt') do echo %%i>>2.txt

sgaizxt001

这是我看到的东西，不知道跟主题有关没有，我觉得还是可以看一下。如果看不懂的可以借助GOOGLE。整篇文本复制的，有闲心的不妨看看

可以学习这些代码的defined用法，以及在for里定义变量，for外显示变量来获取指定行数的方法等

1.     显示指定行的内容
   
2. 
   
3. 出处：http://www.cn-dos.net/forum/viewthread.php?tid=21647
   
4. 
   
5. 
   
6. This page shows how to read specific lines from a text file. There are many ways to have the for /f command read the input file, for instance:-
   
7. 
   
8. for /f "delims=" %%a in (input.txt) do ...
   
9. 
   
10. for /f "delims=" %%a in ('type input.txt') do ...
    
11. 
    
12. for /f "delims=" %%a in ('more ^< input.txt') do ...
    
13. 
    
14. However, only the last method (using the more command) will give consistent results across Windows NT, 2000, XP and 2003. The first method does not recognise unicode files. Also, the usebackq switch must be used if the input filename contains spaces. The second method, using the type command, also fails to recognise unicode files on Windows 2000, XP and 2003 if the input file does not begin with a bit order mark (BOM).
    
15. 
    
16. In all the examples, assume the contents of of the file numbers.txt to be:-
    
17. 
    
18. one
    
19. two
    
20. three
    
21. four
    
22. five
    
23. six
    
24. seven
    
25. eight
    
26. nine
    
27. ten
    
28. 
    
29. Displaying the first line
    
30. 
    
31. This example prints one.
    
32. 
    
33. @echo off & setlocal ENABLEEXTENSIONS
    
34. set "first="
    
35. for /f "delims=" %%a in ('more ^< numbers.txt') do (
    
36.   if not defined first set first=%%a
    
37. )
    
38. echo/%first%
    
39. 
    
40. Displaying the first X lines
    
41. 
    
42. This example prints one, two and three.
    
43. 
    
44. @echo off & setlocal ENABLEEXTENSIONS
    
45. set "lines=3"
    
46. set i=-1
    
47. set "ok="
    
48. for /f "delims=" %%a in ('more ^< numbers.txt') do (
    
49.   set/a i+=1 & for /f %%z in ('echo/%%i%%') do (
    
50.     if "%%z"=="%lines%" set ok=1
    
51.   )
    
52.   if not defined ok echo/%%a
    
53. )
    
54. 
    
55. Displaying the last line
    
56. 
    
57. This example prints ten.
    
58. 
    
59. @echo off & setlocal ENABLEEXTENSIONS
    
60. for /f "delims=" %%a in ('more ^< numbers.txt') do set "last=%%a"
    
61. echo/%last%
    
62. 
    
63. Displaying the last X lines
    
64. 
    
65. This example prints nine and ten.
    
66. 
    
67. @echo off & setlocal ENABLEEXTENSIONS
    
68. set "lines=2"
    
69. for /f %%a in ('find/c /v "" ^< numbers.txt') do set/a skip=%%a-lines
    
70. for /f "delims=" %%a in ('more/e +%skip% ^< numbers.txt') do (
    
71.   echo/%%a
    
72. )
    
73. 
    
74. Displaying the Nth line
    
75. 
    
76. This example prints three. Note that instead of using the more command's /e switch, the skip option could have been used with the for /f command, however, this fails is it is set to any number less than one.
    
77. 
    
78. @echo off & setlocal ENABLEEXTENSIONS
    
79. set LineNo=3
    
80. set "line="
    
81. set/a LineNo-=1
    
82. for /f "delims=" %%a in ('more/e +%LineNo% ^< numbers.txt') do (
    
83.   if not defined line set "line=%%a"
    
84. )
    
85. echo/%line%
    
86. 
    
87. Displaying the Nth line plus X number of lines
    
88. 
    
89. This example prints five and six.
    
90. 
    
91. @echo off & setlocal ENABLEEXTENSIONS
    
92. set start=5
    
93. set "lines=2"
    
94. set/a i=-1,start-=1
    
95. set "ok="
    
96. for /f "delims=" %%a in ('more/e +%start% ^< numbers.txt') do (
    
97.   set/a i+=1 & for /f %%z in ('echo/%%i%%') do (
    
98.     if "%%z"=="%lines%" set ok=1
    
99.   )
    
100.   if not defined ok echo/%%a
     
101. )

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[ 本帖最后由 sgaizxt001 于 2010-5-31 00:23 编辑 ]