迟到的第14周作业

一、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。

二、代码

filee.java

package cn;

import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.util.Scanner;

public class Filee {
    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        System.out.println("输入一个路径");
        String path = reader.nextLine();
        File file = new File(path);

        // FilenameFilter fn=new Way(rail);
        String[] filenames = file.list();
        for (String name : filenames) {
            System.out.println(name);
        }
        System.out.println("输入查询后缀:");
        String rail = reader.nextLine();
        Way way = new Way(rail);
        String[] filenames2 = file.list(way);// 将查询后的文件名放入数组里
        for (String name : filenames2) {
            System.out.println(name);
        }
        System.out.println("请输入需要剪切的文件名：");
        String cutFileName = reader.nextLine();
        File file2 = new File(path + "\" + cutFileName);// 存入原文件
        System.out.println("请输入该文件需要移动到的目录：");
        String cutFileWay = reader.nextLine();
        File cutlist = new File(cutFileWay);// 存入目录
        File newfile = new File(cutFileWay + "\" + cutFileName);// 存入新目录下新文件
        try {
            newfile.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        InputStream ins = null;// 声明
        BufferedInputStream bins = null;
        Writer writer = null;
        BufferedWriter bw = null;
        String filedata = "";
        try {
            ins = new FileInputStream(file2);
            bins = new BufferedInputStream(ins);
            byte[] b = new byte[1024];
            int count = 0;
            try {
                while ((count = bins.read(b, 0, 1024)) != -1) {
                    filedata = filedata + new String(b, 0, count);// 将字符串放入新文件
                }
                writer = new FileWriter(newfile);
                bw = new BufferedWriter(writer);
                bw.write(filedata);

            } catch (IOException e) {
                e.printStackTrace();
            } 
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            bins.close();
            ins.close();
            bw.close();
            writer.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        file2.delete();
    }

}

class Way implements FilenameFilter {
    String type;

    Way(String type) {
        this.type = type;
    }

    public boolean accept(File dir, String name) {
        return name.endsWith(type);
    }
}

三、运行结果