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。

源代码：

TestMain.java

package a;
import java.util.Scanner;
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;
public class TestMain {

    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入原路径：");
        String sourcePath=scanner.nextLine();
        File f=new File(sourcePath);
        FilenameFilter file=new X("sourcePath");
        String[] names=f.list(file);
    for(String name:names) {
        System.out.println(name);
    }
    
    System.out.println("请输入后缀类型：");
    String type=scanner.nextLine();
    X targetType=new X(type);
    String[] targetTypenames=f.list(targetType);
    for(String name:targetTypenames) {
        System.out.println(name);
    }
    System.out.println("请输入要剪切的文件名：");
    String cutName=scanner.nextLine();
    File cutfile=new File(sourcePath+"//"+cutName);
    System.out.println("请输入该文件需要移动到的目标目录：");
    String targetPath=scanner.nextLine();
    File cutlist=new File(targetPath);
    File newfile=new File(targetPath+"//"+cutName);
    try {
        newfile.createNewFile();
    }
    catch(IOException e){
        System.out.println("出现异常");
    }
    
   InputStream in=null;
   BufferedInputStream bis=null;
   Writer w=null;
   BufferedWriter bw=null;
   try {
       in=new FileInputStream(cutfile);
       bis=new BufferedInputStream(in);
       byte[] b=new byte[1024];
       int count=0;
       while((count=bis.read(b,0,1024))!=-1) {
           System.out.println(new String(b));
           
       }
       w=new FileWriter(newfile);
       bw=new BufferedWriter(w);
     //  bw.write(new String(b));
       
   }
   catch(FileNotFoundException e) {
       e.printStackTrace();
   }catch(IOException e) {
       e.printStackTrace();
   }finally {
       try {
           bis.close();
           in.close();
           bw.close();
           w.close();
       }
       catch(IOException e) {
           e.printStackTrace();
       }
   }
   cutfile.delete();
    }

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

运行结果：