[已解决]求批处理根据a文件内容提取b文件内容

pdang

a.txt内

1. KB2670838   
   
2. KB2592687   
   
3. KB2476490   
   
4. KB2479943   
   
5. KB2484033   
   
6. KB2488113   
   
7. KB2491683   
   
8. KB2492386   
   
9. KB2503658   
   
10. KB2505438   
    
11. KB2506014   
    
12. KB2506212   
    
13. KB2506928   
    
14. KB2508429   
    
15. KB2509553   
    
16. KB2511250   
    
17. KB2511455   
    
18. KB2515325   
    
19. KB2522422   
    
20. KB2529073  
    
21. ..............N行
    

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b.txt文件内容如下

1. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2475792-x64_2e8f675625883458482042e128f54167f0193f9b.msu
   
2. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2425227-x64_0749e0e8531479e1de9347fe584e61d43c209c0f.msu
   
3. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2485376-x64_7082a10a94b6cfffdd28f5f57f02e15a5345f5a7.msu
   
4. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2479628-x64_a774713ef62d45373a08d4a7c0acfa18e8ec87c8.msu
   
5. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2482017-x64_95006a2b965e8566d8a57600a0c0c53cb7212874.msu
   
6. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2506212-x64_d23437b7902566fdc1ab3c972f38b3370a1f25a3.msu
   
7. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2446710-x64_2df983290aec7bc15bcdf02722004c299e57c3b0.msu
   
8. http://download.windowsupdate.com/msdownload/update/software/updt/2011/03/windows6.1-kb2511250-x64_460c30edb3e4257720b2fd96dc1e297b5912e29a.msu
   
9. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2506223-x64_aa2472e1a5ca513ad87ee48bb666cff02474b30e.msu
   
10. http://download.windowsupdate.com/msdownload/update/software/updt/2011/04/windows6.1-kb2492386-x64_c3ae664fc97ac46fc51d4b67dcad3b40b860af55.msu
    
11. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2491683-x64_f33cff50cf92e0b8c0043f1ef3587661d600633e.msu
    
12. http://download.windowsupdate.com/msdownload/update/software/crup/2011/03/windows6.1-kb2506014-x64_cc70f2accbfbae5e68f3c7aa3dba8877d1dc88a7.msu
    
13. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2507618-x64_59ebfe1068e7e82a6eb74c2df33a6769af6dbbab.msu
    
14. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2508272-x64_809a19099da4f25de9a33c233765d3969c0c6202.msu
    
15. http://download.windowsupdate.com/msdownload/update/software/updt/2011/03/windows6.1-kb2505438-x64_068d9d60e103c9044b186c5dd3d9f5da9c9ead98.msu
    
16. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2503658-x64_bbabf3cd4b9426b3ff04ee43c6a610ad91f35d4d.msu
    
17. http://download.windowsupdate.com/msdownload/update/software/updt/2011/04/windows6.1-kb2506928-v2-x64_54e2c3d6b32d9ec399c2c4ace6f19018690156bd.msu
    
18. http://download.windowsupdate.com/msdownload/update/software/crup/2011/05/windows6.1-kb2533552-x64_0ba5ac38d4e1c9588a1e53ad390d23c1e4ecd04d.msu
    
19. http://download.windowsupdate.com/msdownload/update/software/crup/2011/03/windows6.1-kb2524375-x64_9293ad5e0fed616819818169518bef00c6219272.msu
    
20. http://download.windowsupdate.com/msdownload/update/software/secu/2011/01/windows6.1-kb2479943-x64_2a683f1c9acb8b3c1fb480c1ff07a275267030ec.msu
    
21. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2497640-x64_963f55e45c86cd263e7260e52691a749458ce49f.msu
    
22. http://download.windowsupdate.com/msdownload/update/software/secu/2011/03/windows6.1-kb2509553-x64_48517ee2bd09479ad2d04c03e00f9b1460996469.msu
    
23. ..................N行
    

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也就是b.txt内含有a.txt里的内容
提取到的内容输入到c.txt

xxpinqz

1. 
   
2. @echo off
   
3. (for /f "tokens=*" %%a in (a.txt) do echo %%~nxa)>$
   
4. findstr /ig:$ b.txt >c.txt
   
5. del $&start c.txt
   

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pdang

非常感谢xxpinqz  问题解决  抽空多向你学习批处理