java 按行读取文件

 File input = new File(System.getProperty("user.dir") + "/doc/"+docName);
  
   StringBuffer sb = new StringBuffer();
  
   try {    
    FileReader fs = new FileReader(input);    
    BufferedReader br = new BufferedReader(fs);  
    String text;   
    while ( (text = br.readLine()) != null) {  
     sb.append(text).append("\n"); 
    }     
    br.close();  
    }  
    catch (Exception ex) {
    }

 

System.out.println(sb.toString());