从文本文件中提取email

用正则表达式提取出文本文件中所有的email

 BufferedReader bufr = new BufferedReader(new FileReader("d://email.txt"));  
 String line = null;  
 String regex = "[a-zA-Z0-9_-]+@\\w+\\.[a-z]+(\\.[a-z]+)?";  // email正则  
 Pattern p = Pattern.compile(regex);  
 while((line = bufr.readLine()) != null) {  
	    Matcher m = p.matcher(line);  
	    while(m.find()) {  
	        System.out.println(m.group());    // 输出匹配的email  
      }  
 }  

从网页中提取email