本文实例讲述了Python删除Java源文件中全部注释的实现方法。分享给大家供大家参考，具体如下：
同事想删除一个Java项目中的全部注释，让我帮忙想想办法。
没找不到合适工具，就写了这个脚本，遍历指定目录，查找*.java文件，删除其中/* */之间，及// 至行末的内容。
（用之前要改改其中的路径）：
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#!D:\Python32# 过滤JAVA程序中的注释# 如果字符串中有注释符号的话会有问题。import osimport reimport io# 改这个目录！！！top_dir = "E:\\java_comments_trim\\";# 状态S_INIT = 0;S_SLASH = 1;S_BLOCK_COMMENT = 2;S_BLOCK_COMMENT_DOT = 3;S_LINE_COMMENT = 4;S_STR = 5;S_STR_ESCAPE = 6;def trim_dir(path): print("目录：" + path); for root, dirs, files in os.walk(path): for name in files: trim_file(os.path.join(root, name)) #for name in dirs: #trim_dir(os.path.join(root, name))def trim_file(path): print("文件：" + path); if re.match(".*java{1}quot;, path): print(" 处理"); else: print(" 忽略"); return; bak_file = path + ".bak"; os.rename(path, bak_file); fp_src = open(bak_file); fp_dst = open(path, 'w'); state = S_INIT; for line in fp_src.readlines(): for c in line: if state == S_INIT: if c == '/': state = S_SLASH; elif c == '"''"': state = S_STR; fp_dst.write(c); else: fp_dst.write(c); elif state == S_SLASH: if c == '*': state = S_BLOCK_COMMENT; elif c == '/': state = S_LINE_COMMENT; else: fp_dst.write('/'); fp_dst.write(c); elif state == S_BLOCK_COMMENT: if c == '*': state = S_BLOCK_COMMENT_DOT; elif state == S_BLOCK_COMMENT_DOT: if c == '/': state = S_INIT; else: state = S_BLOCK_COMMENT; elif state == S_LINE_COMMENT: if c == '\n': state = S_INIT; elif state == S_STR: if c == '\\': state = S_STR_ESCAPE; elif c == '"': state = S_INIT; fp_dst.write(c); elif state == S_STR_ESCAPE: # 这里未完全实现全部序列，如\oNNN \xHH \u1234 \U12345678，但没影响 state = S_STR; fp_dst.write(c); fp_src.close(); fp_dst.close();trim_dir(top_dir); |
希望本文所述对大家Python程序设计有所帮助。
原文链接：http://blog.csdn.net/codearhat/article/details/6852483
