copyfile.java

来自「一套完整的档案管理系统」· Java 代码 · 共 119 行

package com.stsc.archive.backup;

/**
拷贝文件
*/

import java.io.RandomAccessFile;
import java.io.File;

public final class CopyFile
{
	/**
	将sourcefile文件复制到newfile文件
	*/
	public static final boolean copy(String newfile, String sourcefile)
	{
		if( (sourcefile == null) || (sourcefile.length() < 1)
			|| (newfile == null) || (newfile.length() < 1) )
		{
			return false;
		}
			
		try
		{
			//如果不存在目录，则创建目录
			createDir(newfile);
			//＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
			
			RandomAccessFile srcfile = new RandomAccessFile(sourcefile, "r");
			RandomAccessFile dstfile = new RandomAccessFile(newfile, "rw");
	
			long leng = srcfile.length();
			byte[] bData = new byte[(int)leng];
			srcfile.read(bData, 0, (int)leng);
			srcfile.close();
			
			dstfile.write(bData, 0, (int)leng);
			dstfile.close();
			
			return true;
		}catch(Exception e)
		{ 
			String err=e.toString();
			System.out.println(err);
			return false;
		}
	}
	
	//获得文件名中的路径
	public static final String getDir(String filename)
	{
		if(filename == null)
			return null;
			
		String path = null;
		int index = filename.lastIndexOf("\\");
		if(index > 0)
		{
			path = new String(filename);
			System.out.println("path = "+path);
			path = path.substring(0, index);
			System.out.println("sub path = "+path);
		}
		else
		{
			int index1 = filename.lastIndexOf("//");
			if(index1 > 0)
			{
				path = new String(filename);
				System.out.println("path = "+path);
				path = path.substring(0, index1);
				System.out.println("sub path = "+path);
			}
		}
		
		return path;
	}
	
	//创建文件名中的路径
	public static final boolean createDir(String filename)
	{
		//如果不存在目录，则创建目录
		String path = getDir(filename);
		
		return mkDir(path);
		
	/*	if(path != null)
		{
			File dir = new File(path);
			if (!dir.exists()) 
			{
				boolean result = dir.mkdirs();
				if(result == false)
				{
					System.out.println("创建目录失败");
				}
			}
		}*/
	}
	
	public static final boolean mkDir(String path)
	{
		if(path == null)
			return false;
			
		File dir = new File(path);
		if (!dir.exists()) 
		{
			boolean result = dir.mkdirs();
			if(result == false)
			{
				System.out.println("创建目录失败");
				return false;
			}
		}
		
		return true;
	}
}