十四次作业

题目：编写一个应用程序，输入一个目录和一个文件类型，显示该目录下符合该类型的所有文件。之后，将这些文件中的某一个文件剪切到另外一个目录中。

 1 package zuoye;
 2 import java.util.*;
 3 
 4 import java.io.*;
 5 class FileAccept implements FilenameFilter{
 6     String type;
 7     FileAccept(String type){
 8         this.type = type;
 9     }
10     public boolean accept(File Fname, String name) {
11         return name.endsWith(type);
12     }
13     
14 }
15 public class wenjian {
16     public static void main(String[] args) {
17         System.out.println("请输入你的目录:");
18         Scanner in = new Scanner(System.in); 
19         String s = in.next();
20         File Fname = new File(s);                        
21         System.out.println("请输入文件类型");
22         Scanner in1 = new Scanner(System.in); 
23         String k = in1.next();
24         FileAccept count = new FileAccept(k);
25         String fileList[] = Fname.list(count);
26         System.out.println(s+"当前目录下有"+fileList.length+"个文件");
27         for(int i =0;i<fileList.length;i++) {
28             System.out.println(fileList[i]);
29         }       
30         System.out.println("请输入要剪切的文件");
31         Scanner in3 = new Scanner(System.in);        
32         String b = in3.next();    
33         String f = s+"\\"+b;      
34         File Fname1 = new File(f);
35         String FilePath = "C:\\java2"+"\\"+b;    
36         try(BufferedReader close1 = new BufferedReader(new FileReader(f));
37             BufferedWriter writer = new BufferedWriter(new FileWriter(FilePath));    
38             ) {        
39             String line = null;
40             while((line=close1.readLine())!=null) {
41                 System.out.println(line);
42                 writer.write(line);
43             }
44         } catch (FileNotFoundException e) {
45             e.printStackTrace();
46         } catch (IOException e) {
47             e.printStackTrace();
48         }
49         System.out.println("被剪切的"+b+"文件"+"已执行,自动删除原文件");
50         Fname1.delete();              
51     }
52 }

运行结果：

原始文件夹：

剪切后的文件夹：