博客主页：http://blog.csdn.net/minna_d

起因：

我们经常会有驼峰字符串与下划线字符串相互转化的需求， 而且这个还不好之间用正则替换。

比如：db 表中命名风格通常为下划线风格， web应用pojo中通常有时驼峰风格。 如果字段太多，总觉得很麻烦

实现：

cm2us.py：

#!/bin/python
import re
import sys


def camelToUnderlines(x):
    return re.sub('_([a-z])', lambda match: match.group(1).upper(), x)


def underlinesToCamel(x):
    return re.sub('([a-zA-Z])([A-Z])', lambda match: match.group(1).lower() + "_" + match.group(2).lower(), x)


def transStr(file_path, cmToUs_or_usToCm):
    f = open(file_path, 'r')
    if cmToUs_or_usToCm == 'cmToUs':
        for line in f.readlines():
            print camelToUnderlines(line.strip())
    elif cmToUs_or_usToCm == 'usToCm':
        for line in f.readlines():
            print underlinesToCamel(line.strip())
    f.close()

if __name__ == '__main__':
    style = 'usToCm' if sys.argv[2]=="0" else 'cmToUs'
    transStr(sys.argv[1], style)

cm2us.sh:

#!/bin/bash
case $1 in
    /*)
        file_origin=$1
        file_bak=`echo $1 | sed 's/^\/.*\/\(.*\)/\/tmp\/\1/g' `;;
    *)
        file_origin=`pwd`"/"$1
        file_bak="/tmp/$1";;
esac
read -p "please input a number , 0 represent camelToUnderline, else represent underlineToCamel :"  nu
echo $file_origin
echo $file_bak
echo $nu
cp $file_origin /tmp/
python /shell/python/cm2us.py $file_bak $nu > $file_origin

使用方式：示例

[root@jjy ~/q/data/tmp_data]# cm2us.sh date
please input a number , 0 represent camelToUnderline, else represent underlineToCamel :1
[root@jjy ~/q/data/tmp_data]# cat date
private String id;
private String wrapperId;
private String cityCode;
private String clstdCheckedCnt;
private String clstdNeedcheckCnt;
private String notClstdCnt;
private String deleteCnt;
private String manualCheckCnt;
private String clstdCheckedOnCnt;
private String clstdCheckedDelCnt;
private String clstdCheckedCleanCnt;
private String abnormalNeedcheckCnt;
private String hasPriceNeedcheckCnt;
[root@jjy ~/q/data/tmp_data]# cm2us.sh date
please input a number , 0 represent camelToUnderline, else represent underlineToCamel :0
[root@jjy ~/q/data/tmp_data]# cat date
private String id;
private String wrapper_id;
private String city_code;
private String clstd_checked_cnt;
private String clstd_needcheck_cnt;
private String not_clstd_cnt;
private String delete_cnt;
private String manual_check_cnt;
private String clstd_checked_on_cnt;
private String clstd_checked_del_cnt;
private String clstd_checked_clean_cnt;
private String abnormal_needcheck_cnt;
private String has_price_needcheck_cnt;
[root@jjy ~/q/data/tmp_data]# cm2us.sh date
please input a number , 0 represent camelToUnderline, else represent underlineToCamel :1
[root@jjy ~/q/data/tmp_data]# cat date
private String id;
private String wrapperId;
private String cityCode;
private String clstdCheckedCnt;
private String clstdNeedcheckCnt;
private String notClstdCnt;
private String deleteCnt;
private String manualCheckCnt;
private String clstdCheckedOnCnt;
private String clstdCheckedDelCnt;
private String clstdCheckedCleanCnt;
private String abnormalNeedcheckCnt;
private String hasPriceNeedcheckCnt;