删除Java代码中的所有注释

 
 

  
  文章来源：http://blog.youkuaiyun.com/fullstack/article/details/22688777
 
 
 
 

  
  package 
  
  tools
  
  ;
 
 
 
 

  
  

 
 
 
 

  
  import 
  
  java.io.BufferedReader
  
  ;
 
 
 
 

  
  import 
  
  java.io.BufferedWriter
  
  ;
 
 
 
 

  
  import 
  
  java.io.File
  
  ;
 
 
 
 

  
  import 
  
  java.io.FileInputStream
  
  ;
 
 
 
 

  
  import 
  
  java.io.FileOutputStream
  
  ;
 
 
 
 

  
  import 
  
  java.io.InputStreamReader
  
  ;
 
 
 
 

  
  import 
  
  java.io.OutputStreamWriter
  
  ;
 
 
 
 

  
  

 
 
 
 

  
  /**
 
 
 
 

  
   * 删除Java代码中的注释
 
 
 
 

  
   * 
 
 
 
 

  
   * @author Alive
 
 
 
 

  
   * @build 2010-12-23
 
 
 
 

  
   */
 
 
 
 

  
  public 
  
  class 
  
  DeleteComments 
  
  {
 
 
 
 

  
  

 
 
 
 
    
  
  private 
  
  static 
  
  int 
  
  count 
  
  = 
  
  0
  
  ;
 
 
 
 

  
  

 
 
 
 
    
  
  /**
 
 
 
 

  
       * 删除文件中的各种注释，包含//、/* * /等
 
 
 
 

  
       * @param charset 文件编码
 
 
 
 

  
       * @param file 文件
 
 
 
 

  
       */
 
 
 
 
    
  
  public 
  
  static 
  
  void 
  
  clearComment
  
  (
  
  File 
  
  file
  
  , 
  
  String 
  
  charset
  
  ) 
  
  {
 
 
 
 
        
  
  try 
  
  {
 
 
 
 
            
  
  //递归处理文件夹
 
 
 
 
            
  
  if 
  
  (!
  
  file
  
  .
  
  exists
  
  ()) 
  
  {
 
 
 
 
                
  
  return
  
  ;
 
 
 
 
            
  
  }
 
 
 
 

  
  

 
 
 
 
            
  
  if 
  
  (
  
  file
  
  .
  
  isDirectory
  
  ()) 
  
  {
 
 
 
 
                
  
  File
  
  [] 
  
  files 
  
  = 
  
  file
  
  .
  
  listFiles
  
  ();
 
 
 
 
                
  
  for 
  
  (
  
  File 
  
  f 
  
  : 
  
  files
  
  ) 
  
  {
 
 
 
 
                    
  
  clearComment
  
  (
  
  f
  
  , 
  
  charset
  
  ); 
  
  //递归调用
 
 
 
 
                
  
  }
 
 
 
 
                
  
  return
  
  ;
 
 
 
 
            
  
  } 
  
  else 
  
  if 
  
  (!
  
  file
  
  .
  
  getName
  
  ().
  
  endsWith
  
  (
  
  ".java"
  
  )) 
  
  {
 
 
 
 
                
  
  //非java文件直接返回
 
 
 
 
                
  
  return
  
  ;
 
 
 
 
            
  
  }
 
 
 
 
            
  
  System
  
  .
  
  out
  
  .
  
  println
  
  (
  
  "-----开始处理文件：" 
  
  + 
  
  file
  
  .
  
  getAbsolutePath
  
  ());
 
 
 
 

  
  

 
 
 
 
            
  
  //根据对应的编码格式读取
 
 
 
 
            
  
  BufferedReader 
  
  reader 
  
  = 
  
  new 
  
  BufferedReader
  
  (
  
  new 
  
  InputStreamReader
  
  (
  
  new 
  
  FileInputStream
  
  (
  
  file
  
  ), 
  
  charset
  
  ));
 
 
 
 
            
  
  StringBuffer 
  
  content 
  
  = 
  
  new 
  
  StringBuffer
  
  ();
 
 
 
 
            
  
  String 
  
  tmp 
  
  = 
  
  null
  
  ;
 
 
 
 
            
  
  while 
  
  ((
  
  tmp 
  
  = 
  
  reader
  
  .
  
  readLine
  
  ()) 
  
  != 
  
  null
  
  ) 
  
  {
 
 
 
 
                
  
  content
  
  .
  
  append
  
  (
  
  tmp
  
  );
 
 
 
 
                
  
  content
  
  .
  
  append
  
  (
  
  "\n"
  
  );
 
 
 
 
            
  
  }
 
 
 
 
            
  
  String 
  
  target 
  
  = 
  
  content
  
  .
  
  toString
  
  ();
 
 
 
 
            
  
  //String s = target.replaceAll("\\/\\/[^\\n]*|\\/\\*([^\\*^\\/]*|[\\*^\\/*]*|[^\\**\\/]*)*\\*\\/", ""); //本段正则摘自网上，有一种情况无法满足（/* ...**/），略作修改
 
 
 
 
            
  
  String 
  
  s 
  
  = 
  
  target
  
  .
  
  replaceAll
  
  (
  
  "\\/\\/[^\\n]*|\\/\\*([^\\*^\\/]*|[\\*^\\/*]*|[^\\**\\/]*)*\\*+\\/"
  
  , 
  
  ""
  
  );
 
 
 
 
            
  
  //System.out.println(s);
 
 
 
 
            
  
  //使用对应的编码格式输出
 
 
 
 
            
  
  BufferedWriter 
  
  out 
  
  = 
  
  new 
  
  BufferedWriter
  
  (
  
  new 
  
  OutputStreamWriter
  
  (
  
  new 
  
  FileOutputStream
  
  (
  
  file
  
  ), 
  
  charset
  
  ));
 
 
 
 
            
  
  out
  
  .
  
  write
  
  (
  
  s
  
  );
 
 
 
 
            
  
  out
  
  .
  
  flush
  
  ();
 
 
 
 
            
  
  out
  
  .
  
  close
  
  ();
 
 
 
 
            
  
  count
  
  ++;
 
 
 
 
            
  
  System
  
  .
  
  out
  
  .
  
  println
  
  (
  
  "-----文件处理完成---" 
  
  + 
  
  count
  
  );
 
 
 
 
        
  
  } 
  
  catch 
  
  (
  
  Exception 
  
  e
  
  ) 
  
  {
 
 
 
 
            
  
  e
  
  .
  
  printStackTrace
  
  ();
 
 
 
 
        
  
  }
 
 
 
 
    
  
  }
 
 
 
 

  
  

 
 
 
 
    
  
  public 
  
  static 
  
  void 
  
  clearComment
  
  (
  
  String 
  
  filePath
  
  , 
  
  String 
  
  charset
  
  ) 
  
  {
 
 
 
 
        
  
  clearComment
  
  (
  
  new 
  
  File
  
  (
  
  filePath
  
  ), 
  
  charset
  
  );
 
 
 
 
    
  
  }
 
 
 
 

  
  

 
 
 
 
    
  
  public 
  
  static 
  
  void 
  
  clearComment
  
  (
  
  String 
  
  filePath
  
  ) 
  
  {
 
 
 
 
        
  
  clearComment
  
  (
  
  new 
  
  File
  
  (
  
  filePath
  
  ), 
  
  "UTF-8"
  
  );
 
 
 
 
    
  
  }
 
 
 
 

  
  

 
 
 
 
    
  
  public 
  
  static 
  
  void 
  
  clearComment
  
  (
  
  File 
  
  file
  
  ) 
  
  {
 
 
 
 
        
  
  clearComment
  
  (
  
  file
  
  , 
  
  "UTF-8"
  
  );
 
 
 
 
    
  
  }
 
 
 
 

  
  

 
 
 
 
    
  
  public 
  
  static 
  
  void 
  
  main
  
  (
  
  String
  
  [] 
  
  args
  
  ) 
  
  {
 
 
 
 
        
  
  clearComment
  
  (
  
  "D:\\eclipse3.3\\workspace\\Sanguosha"
  
  ); 
  
  //删除目录下所有java文件注释
 
 
 
 
        
  
  //删除某个具体文件的注释
 
 
 
 
        
  
  //clearComment("D:\\proj\\scm\\action\\AbcdefgAction.java");
 
 
 
 
    
  
  }
 
 
 
 

  
  

 
 
 
 

  
  }