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：

import java.io.*;
 
import java.util.Scanner;
 
 
class FileAccepct implements FilenameFilter{
    String str = null;
    FileAccepct(String str){
        this.str = "."+str;
    }
    public boolean accept(File dir, String name) {
        return name.endsWith(str);
    }
}
public class test {
 
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入一个目录和一个文件类型");
        Scanner s=new Scanner(System.in);
        String path=s.next();
        File dir =new File(path);
        FileAccepct f =new FileAccepct(s.next());
        String list[]=dir.list(f);
         for(int i = 0;i<list.length;i++){
                System.out.print(list[i]+"\n");
            }
        System.out.println("请输入需要剪切的文件名：");
        String cut = s.next();
        File cutfile = new File(path+"\\"+cut);
        System.out.println("请输入该文件需要移动到的目录：");
        String cutway = s.next(); 
        File cutlist = new File(cutway);       
        File newfile = new File(cutway+"\\"+cut);
        try {
            newfile.createNewFile();//创建新文件
        } catch (IOException e) {
            e.printStackTrace();
        }
        InputStream inputStream = null;
        BufferedInputStream bufferedInputStream = null;
        String filedata="";
        Writer writer = null;
        BufferedWriter bufferedWriter = null;
        try {
            inputStream = new FileInputStream(cutfile);
            bufferedInputStream = new BufferedInputStream(inputStream);
            byte[] b = new byte[1024];
            int count = 0;
            while((count = bufferedInputStream.read(b, 0, 1024))!=-1){
                filedata=filedata+new String(b, 0, count);
            }
            writer = new FileWriter(newfile);
            bufferedWriter = new BufferedWriter(writer);
            bufferedWriter.write(filedata);
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                bufferedInputStream.close();
                inputStream.close();
                bufferedWriter.close();
                writer.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        cutfile.delete();
         
            
 
    }
 
}