1 /**
2 *homework0926
3 *@author:kai li
4 */
5 package com.kai.li.homework0927;
6 import java.util.List;
7 import java.util.ArrayList;
8 import java.nio.file.Files;
9 import java.nio.file.Paths;
10 import java.nio.file.StandardOpenOption;
11 import java.nio.charset.Charset;
12 import java.util.Scanner;
13 import java.io.BufferedReader;
14 import java.io.FileReader;
15 import java.io.File;
16 /**
17 *following class is client
18 */
19 public class HomeWork0927{
20 public static void main(String[] args)throws Exception{
21
22 /**
23 *question one
24 */
25
26 /*create data source*/
27
28 String fileTarget="d:/text1.txt";
29 List<String> lines=new ArrayList<>();
30 lines.add("学号：17，姓名：小八。");
31 lines.add("学号：18，姓名：小七。");
32
33 /*write and read to a file*/
34
35 //write
36 Files.write(Paths.get(fileTarget),lines,Charset.defaultCharset(),StandardOpenOption.CREATE);
37 System.out.println("write is success");
38 //read
39 byte[] contentBytes=Files.readAllBytes(Paths.get(fileTarget));
40 System.out.println(new String(contentBytes));
41
42 /**
43 *question two
44 */
45
46 //read
47 byte[] contentBytes2=Files.readAllBytes(Paths.get(fileTarget));
48 //input scanner
49 System.out.println("please input file name");
50 Scanner scanner=new Scanner(System.in);
51 String txtName=scanner.nextLine();
52 //write
53 String fileTarget2="d:/"+txtName;
54 Files.write(Paths.get(fileTarget2),contentBytes2,StandardOpenOption.CREATE);
55 System.out.println("write is success");
56
57 /**
58 *question three
59 */
60
61 BufferedReader br=new BufferedReader(new FileReader(fileTarget2));
62 String contentFileName=br.readLine();
63 File file=new File(fileTarget2);
64 File target=new File("e:/"+contentFileName+".txt");
65 file.renameTo(target);
66 System.out.println("move success");
67 }
68 }
