本文實例講述了Python刪除Java源文件中全部注釋的實現方法。分享給大家供大家參考，具體如下：
同事想刪除一個Java項目中的全部注釋，讓我幫忙想想辦法。
沒找不到合適工具，就寫了這個腳本，遍歷指定目錄，查找*.java文件，刪除其中/* */之間，及// 至行末的內容。
（用之前要改改其中的路徑）：
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#!D:\Python32# 過濾JAVA程序中的注釋# 如果字符串中有注釋符號的話會有問題。import osimport reimport io# 改這個目錄！！！top_dir = "E:\\java_comments_trim\\";# 狀態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("目錄：" + 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(" 處理"); 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: # 這里未完全實現全部序列，如\oNNN \xHH \u1234 \U12345678，但沒影響 state = S_STR; fp_dst.write(c); fp_src.close(); fp_dst.close();trim_dir(top_dir); |
希望本文所述對大家Python程序設計有所幫助。
原文鏈接：http://blog.csdn.net/codearhat/article/details/6852483
