1 package test; 2  3 import java.io.BufferedReader; 4 import java.io.File; 5 import java.io.FileOutputStream; 6 import java.io.FileReader; 7 import java.io.IOException; 8 import java.io.UnsupportedEncodingException; 9 import java.text.SimpleDateFormat;10 import java.util.Date;11 12 public class FileOperation {13   /**14    *  生成文件15    *  @param fileName16    */17   public static boolean createFile(File fileName){18     if(!fileName.exists()){  19       try {20         fileName.createNewFile();21       } catch (Exception e) {22         // TODO Auto-generated catch block23         e.printStackTrace();24       }25     }26     return true;27   }28   29   /**30    * @description 读文件31    * @throws IOException 32    */33   public static String readTxtFile(File fileName) throws IOException{34     String result = null;35     FileReader fileReader = null;36     BufferedReader bufferedReader = null;37     fileReader = new FileReader(fileName);38     bufferedReader = new BufferedReader(fileReader);39     40     String read = null;41     int count = 0;42     while((read = bufferedReader.readLine()) != null){43       result = result + count + read + "\r\n";44       count++;45     }46     47     if(bufferedReader != null){48       bufferedReader.close();49     }50     51     if(fileReader != null){52         fileReader.close();53     }54     55     System.out.println("¶ÁÈ¡ÎļþµÄÄÚÈÝÊÇ£º " + "\r\n" + result);56     return result;57   }58   59   /**60    * @description 写文件61    * @param args62    * @throws UnsupportedEncodingException 63    * @throws IOException64    */65   public static boolean writeTxtFile(String content,File fileName) throws UnsupportedEncodingException, IOException{66     FileOutputStream o = null;67     o = new FileOutputStream(fileName);68     o.write(content.getBytes("UTF-8"));69     o.close();70     return true; 71   }72   73   /**74    * @description 单元测试75    * @throws IOException76    */77   public static void main(String[] args) throws IOException {78     File file = new File("d:/hello.txt");79     Date date = new Date();80     SimpleDateFormat day = new SimpleDateFormat("yyyyMMddHHmmss");81     String dateName = day.format(date);82     File copyFile = new File("d:/" + dateName + ".txt");83     String content = readTxtFile(file);84     createFile(copyFile);85     writeTxtFile(content,copyFile);86   }87 }