本文主要介绍了Python的脚本替换,由于工作的需要,必须对日志系统进行更新,这里在网上搜索到一篇文章比较不错,这里记录下,大家可以参考下,
工作中需要迁移代码,并把原来的日志系统更新到现在的格式,原来获取log的格式是
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AuctionPoolLoggerUtil.getLogger()
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现在获取log的格式是:
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LoggerFactory.getLogger(XXXXX. class )
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这里的XXXXX需要替换为当前的类名。如果这样的java文件不多还好,可以一个个人肉替换。一旦这样的文件很多,特别是迁移过来大量的文件时,你就会发现简直是一场灾难。其实我们发现上面的工作很多是机械单调的。ide中的替换功能不能做到的是把XXXXX替换成当前的类名。而python很容易处理文本,利用正则表达式可以比较方便的拿到类名,然后替换掉xxxxx就可以了。
实现代码:
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import fileinput
import os
import re
__author__ = 'ykdsg'
packDir = '/Users/ykdsg/svn_workspace/auctionplatform/misc_refactory/auctionplatform/ap-biz/src/main/java/com/yk/misccenter'
#查找class name
findClassNameP = re. compile (r "(?<=class\s)\w*" )
findXP = re. compile (r "XXXXX" )
def processDirectory(args,dirname,filenames):
# print 'Directory',dirname
for filename in filenames:
if os.path.splitext(filename)[ 1 ] = = '.java' :
# print 'file',filename
fullFileUrl = dirname + "/" + filename
fileObj = open (fullFileUrl)
className = ''
# Optional in-place filtering: if the keyword argument inplace=1 is passed to fileinput.input() or to
# the FileInput constructor, the file is moved to a backup file and standard output is directed to the
# input file (if a file of the same name as the backup file already exists, it will be replaced silently)
# . This makes it possible to write a filter that rewrites its input file in place. If the backup
# parameter is given (typically as backup='.<some extension>'), it specifies the extension for the
# backup file, and the backup file remains around; by default, the extension is '.bak' and it is deleted
# when the output file is closed. In-place filtering is disabled when standard input is read.
for line in fileinput. input (fullFileUrl, inplace = 1 ):
matchClass = findClassNameP.search(line)
if matchClass:
className = matchClass.group()
matchX = findXP.search(line)
if matchX:
#print 后面需要有, 否则会出现多余的空行
print line.replace( 'XXXXX' ,className),
else :
print line,
def search():
os.path.walk(packDir,processDirectory, None )
if __name__ = = '__main__' :
search()
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上面的脚本中大部分是fileinput.input的注释,就是说了inplace=1其实就是把源文件的内容放到缓存区,然后直接将内容写入源文件
findClassNameP 是查找class name的正则表达式,上面的逻辑就是对文件逐行分析,拿到class name。然后再分析当前行是否有xxxxx,有的话就用class name 替换,没有的话就原行输出。
以上使用对python脚本替换指定行的简单实例,如果大家有疑问或者更好的方法可以留言讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://blog.csdn.net/ykdsg/article/details/11999681