java实现文件夹的复制

java使用io流对文件夹进行操作，实现对文件和文件夹的复制：

思路：

首先需要判断是文件还是文件夹，其次还需要判断源文件夹是否存在，其他的实现就比较简单了

package Ray.io;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class TestCopyDir2 {
	public static void main(String[] args) {
		//copy("E:/A","E:/C");
		copyDir("E:/A","E:/C");
	}
	public static void copyDir(String srcFile,String dstFile) {
		File srcfile = new File(srcFile);
		if(!srcfile.exists()){
			System.out.println("no exists");
			return ;
		}
		File dstfile = new File(dstFile);
		if(!dstfile.exists()){
			dstfile.mkdir();
		}
		File[] list = srcfile.listFiles();
		for(File file:list){
			if(file.isFile()){
				copy(srcFile+"/"+file.getName(), dstFile+"/"+file.getName());
			}
			if(file.isDirectory()){
				copyDir(srcFile+"/"+file.getName(), dstFile+"/"+file.getName());
			}
		}
	}
	public static void copy(String src,String dst){
		BufferedInputStream bis = null;
		BufferedOutputStream bos = null;
		try {
			
			bis = new BufferedInputStream(new FileInputStream(new File(src)));
			bos = new BufferedOutputStream(new FileOutputStream(new File(dst)));
			
			byte[] b =new byte[1024];
			int n = 0;
					
			
			while((n =bis.read(b))!=-1){
				bos.write(b, 0, n);
			//	bis.read();
			}
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				bis.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			try {
				bos.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}