fileaccessi.java

来自「http 多线程断点下载 http 多线程断点下载」· Java 代码 · 共 37 行

package httpdrowload.file;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.io.Serializable;

public class FileAccessI implements Serializable{

	RandomAccessFile oSavedFile;
	long             nPos;

	public FileAccessI() throws IOException
	{
		this("",0);
	}

	public FileAccessI(String sName,long nPos) throws IOException
	{
		oSavedFile = new RandomAccessFile(sName,"rw");
		this.nPos  = nPos;
		oSavedFile.seek(nPos);
	}

	public synchronized int write(byte[] b,int nStart,int nLen)
	{
		int n = -1;
		try{
			oSavedFile.write(b,nStart,nLen);
			n = nLen;
		}
		catch(IOException e){
			e.printStackTrace ();
		}
		return n;
	}
}