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 fileName
16 */
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 block
23 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 + "
";
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 " + "
" + result);
56 return result;
57 }
58
59 /**
60 * @description 写文件
61 * @param args
62 * @throws UnsupportedEncodingException
63 * @throws IOException
64 */
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 IOException
76 */
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 }
