第14周作业

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。

代码：

package edu.ccut;
import java.io.*;
import java.util.*;

public class Text {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入一个目录");
        Scanner input= new Scanner(System.in); 
        String str = input.next();
        File dir = new File(str);                        
        System.out.println("输入文件类型");
        Scanner input2 = new Scanner(System.in); 
        String aa = input2.next();
        FileType ft= new FileType(aa);
        String fileList[] = dir.list(ft);
        System.out.println("目录下有"+fileList.length+"个文件");
        for(int i =0;i<fileList.length;i++) {
            System.out.println(fileList[i]);
        } 
        System.out.println("输入要剪切的文件");
        Scanner input3 = new Scanner(System.in);        
        String str1 = input3.next(); 
        String f = str+"\"+str1;    
        File dir1 = new File(f);
        String FilePath = "C:\java运行"+"\"+str1;
        try {
            BufferedReader in = new BufferedReader(new FileReader(f));
             try {
                BufferedWriter writer = new BufferedWriter(new FileWriter(FilePath));
                String line = null;
                while((line=in.readLine())!=null) {
                    System.out.println(line);
                    writer.write(line);
            } }catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }   
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        dir1.delete();  
       
    }
}


class FileType implements FilenameFilter{
    String type;
    FileType(String type){
        this.type = type;
    }
    public boolean accept(File dir, String name) {
        return name.endsWith(type);
    }  
}

运行结果：