package uu;
import java.io.*;
public class FileAccept implements FilenameFilter {
    String str=null;
    FileAccept(String s){
        str=""+s;
    }
    public boolean accept(File dir,String name) {
        return name.endsWith(str);
    }
    public static void main(String[] args) {
        File dir=new File("D:\\rm");
        FileAccept acceptCondition=new FileAccept("txt");    //
        String fileList[]=dir.list(acceptCondition);
        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]);
        }  

二、运行结果

之后,将这些文件中的某一个文件剪切到另外一个目录中。

三、程序

File file1=new File("D:\\rm\\haha.txt");
    File file2=new File("C:\\Drivers\\rm\\haha.txt");
    file1.deleteOnExit();       //在程序结束是删除原来的文件1
    try {
        file2.createNewFile();  //在C盘创建新的文件2
    }catch (IOException e) {
        e.printStackTrace();
    }
     cutFile(file1,file2);
    }
    public static void cutFile(File file1,File file2) {
        FileOutputStream fileOutputStream=null;
        InputStream inputStream=null;
        byte[] bytes=new byte[1024];
        int temp=0;
        try {
            inputStream=new FileInputStream(file1);
            fileOutputStream=new FileOutputStream(file2);
            while((temp=inputStream.read(bytes))!=-1) {
                fileOutputStream.write(bytes,0,temp);
                fileOutputStream.flush();
            }
        }catch (FileNotFoundException e) {
            e.printStackTrace();    
        }catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(inputStream!=null) {
                try {
                    inputStream.close();
                }catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(fileOutputStream!=null) {
                try {
                    fileOutputStream.close();
                }catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

四、运行结果

posted on 2019-12-07 16:26  韩玉双20194626  阅读(234)  评论(0编辑  收藏  举报