几个常用程序

搜索当前目录下的文件

知道大概的文件名称，使用

findf FileName

findf.py

import argparse, re, osfrom os.path import joinparser = argparse.ArgumentParser()parser.add_argument('FILENAME', help='file name use regular expression')parser.add_argument('-e', metavar='EXCLUDE', default=None, help='exclude file name use regular expression')args = parser.parse_args()count = 0for root, dirs, files in os.walk(os.getcwd()):    for name in files:        if not re.search(args.FILENAME, name):            continue        if args.e and re.search(args.e, name):            continue        count += 1        print(join(root, name))if count <= 1:    print('\t %d file found.' % (count))else:    print('\t %d files found.' % (count))

对应在 windows 下可以使用这样的命令：

dir /b /s FileName

在 linux 下可以使用这样的命令：

find . -name FileName -print

在当前目录及子目录中搜索文件包含的字符串

比如，看看哪些 java 文件中包含了 "Hello" 字符串

finds .java Hello

finds.py

import os, re, argparsefrom os.path import joinparser = argparse.ArgumentParser()parser.add_argument('-c', metavar='CODING', default='utf-8', help='coding: gbk, utf-8')parser.add_argument('EXT', help='.java, .txt')parser.add_argument('REGEX', help='regular expression')args = parser.parse_args()for root, dirs, files in os.walk(os.getcwd()):    for name in files:        if name[-len(args.EXT):] != args.EXT:            continue        count = 0        inFile = False        for line in open(join(root, name), encoding=args.c).readlines():            count += 1            if re.search(args.REGEX, line):                print(count, '\t', line, end='')                inFile = True        if inFile:            print(join(root,name))

对应在 windows 下的命令：

findstr /s /c:"Hello" *.java

在 linux 下：

find . -name '*.java' -exec grep 'Hello' \{} \; -print

查找一个类所在的 jar 包

有时候，需要使用一个类，但不知道它在哪个 jar 包中。

findj ClassName

findj.py

import os, re, sysfrom os.path import joinfrom zipfile import ZipFiledef find_in_all_jars(matchstr, path):    for root, dirs, files in os.walk(path):        for name in files:            if name[-4:] == '.jar' and handle_jar(matchstr, join(root, name)):                print(join(root, name))def handle_jar(matchstr, filename):    isMatch = False    with ZipFile(filename) as zipfile:        for name in zipfile.namelist():            if re.search(matchstr, name):                print('\t', name)                isMatch = True    return isMatchif len(sys.argv) != 2:    print('''Usage: findj ClassName.class''')    sys.exit()#find_in_all_jars(sys.argv[1], os.getcwd())  # 在当前目录及子目录中所有 jar 包中查find_in_all_jars(sys.argv[1], 'e:\\data\\repository')

对应的 windows 命令：

for /r %i in (*.jar) do @jar tf %i | find "FastDateFormat" && echo %ifor /r %i in (*.jar) do @jar tf %i | find "FastDateFormat" & echo %i

Linux 命令

find . -name '*.jar' -exec jar tvf \{} \| grep Hello \; -print

字数统计

统计当前目录下对应文件的字数，单词数，行数

pwc .java

pwc.py

import os, re, argparsefrom os.path import joinparser = argparse.ArgumentParser()parser.add_argument('-c', metavar='CODING', default='utf-8', help='coding: gbk, utf-8')parser.add_argument('-d', action='store_true', default=False, help='print detail')parser.add_argument('EXT', help='.java, .txt')args = parser.parse_args()nf = nl = nw = nc = 0for root, dirs, files in os.walk(os.getcwd()):    for name in files:        if name[-len(args.EXT):] != args.EXT:            continue        nf += 1        nnl = nnc = nnw = 0        try:            for line in open(join(root, name), encoding=args.c).readlines():                nnl += 1                nnc += len(line)                nnw += len(line.split())        except:            print('Passing file error: ' + join(root, name))        nl += nnl        nc += nnc        nw += nnw        if args.d:            print("%12d%10d%8d  %s" % (nnc, nnw, nnl, join(root, name)))print("%12d%10d%8d%10d Files" % (nc, nw, nl, nf))