Java学习之FileUtil代码

package byteIO;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
/**
 * 文件的操作
 */
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class FileUtil {
	public static void copyFile(String srcFile,String destFile) throws IOException {
		copyFile(new File(srcFile),new File(destFile));
	}
	
	public static void copyFile(File src,File dest) throws IOException {
		if (!src.isFile()) {
			throw new IOException("只能拷贝文件");
		}
		if(dest.isDirectory()) {
			throw new IOException("不能建立与文件夹同名的文件");
		}
		InputStream iStream = new BufferedInputStream(new FileInputStream(src));
		OutputStream oStream = new BufferedOutputStream(new FileOutputStream(dest));
		byte[] flush = new byte[1024];
		int len = 0;
		while (-1!=(len=iStream.read(flush))) {//这里读
			oStream.write(flush, 0, len);//这里写
		}
		oStream.flush();
		oStream.close();
		iStream.close();
	}
	
	public static void copyDir(String srcPath,String destPath) {
		File src = new File(srcPath);
		File dest = new File(destPath);
		copyDir(src,dest);
	}
	
	public static void copyDir(File src,File dest) {
		if(src.isDirectory()) {
			dest = new File(dest,src.getName());
		}
		copyDirsDetail(src,dest);
	}
	
	public static void copyDirsDetail(File src,File dest) {
		if (src.isFile()) {
			try {
				FileUtil.copyFile(src, dest);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}else if(src.isDirectory()) {
			dest.mkdirs();
			for(File sub:src.listFiles()) {
				copyDirsDetail(sub, new File(dest, sub.getName()));
			}
		}
	}

}