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按行分割文件

时间：2011-01-27

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bash-2.03$ cat complex.txt
2aaa1 bbb1
1aaa2 bbb2
1aaa3 bbb3
3aaa4 bbb4
4aaa5 bbb5
bash-2.03$ cat complex.sh
#!/bin/bash
cat complex.txt | while read line; do
case `echo $line | cut -c 1` in
"1")
echo $line >>1.txt;;
"2")
echo $line >>2.txt;;
"3")
echo $line >>3.txt;;
*)
echo $line;;
esac
donebash-2.03$ ./complex.sh
4aaa5 bbb5
bash-2.03$

复制代码

效率还能提高么？

作者: clonescopy 发布时间: 2011-01-27

for i in {1..4};do grep ^$i lines4 && echo "++++++++++++++";done
1aaa2 bbb2
1aaa3 bbb3
++++++++++++++
2aaa1 bbb1
++++++++++++++
3aaa4 bbb4
++++++++++++++
4aaa5 bbb5
++++++++++++++

作者: 昭襄王发布时间: 2011-01-27

awk 'BEGIN{FS=""}{if ($1<=3) {print >$1".txt"} else print }' file

作者: 99超人发布时间: 2011-01-27

split -l1 urfile

作者: shileiadmin 发布时间: 2011-01-27

bash-2.03$ for i in {1..4};do grep ^$i complex.txt && echo "++++++++++++++";done
bash-2.03$

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作者: clonescopy 发布时间: 2011-01-27

awk '{print > substr($1,1,1)".txt" }' file

作者: yinyuemi 发布时间: 2011-01-27

QUOTE:

awk 'BEGIN{FS=""}{if ($1$1".txt"} else print }' file
99超人发表于 2011-01-27 16:34

bash-2.03$ awk 'BEGIN{FS=""}{if ($1<=3) {print >$1"z.txt"} else print }' complex.txt
3aaa4 bbb4
4aaa5 bbb5

复制代码

作者: clonescopy 发布时间: 2011-01-27

QUOTE:

split -l1 urfile
shileiadmin 发表于 2011-01-27 16:35

这位兄弟 split不适用这个场景不要骗我哦:D

作者: clonescopy 发布时间: 2011-01-27

回复 clonescopy

难道是awk版本问题，我这里不会

[oracle@imeg02 zgw]$ cat file
2aaa1 bbb1
1aaa2 bbb2
1aaa3 bbb3
3aaa4 bbb4
4aaa5 bbb5
[oracle@imeg02 zgw]$ awk 'BEGIN{FS=""}{if ($1<=3) {print >$1".txt"} else print }' file
4aaa5 bbb5

作者: 99超人发布时间: 2011-01-27

QUOTE:

awk '{print > substr($1,1,1)".txt" }' file
yinyuemi 发表于 2011-01-27 16:42