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/**
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* @author javaFound
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public static boolean changeFile(String fName,int start,int len) throws Exception{
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java.io.RandomAccessFile raf=new java.io.RandomAccessFile(fName,"rw");
long totalLen=raf.length();
System.out.println("Îļþ×ܳ¤×Ö½ÚÊÇ: "+totalLen);
//´ò¿ªÒ»¸öÎļþͨµÀ
java.nio.channels.FileChannel channel=raf.getChannel();
//Ó³ÉäÎļþÖеÄijһ²¿·ÖÊý¾ÝÒÔ¶Áдģʽµ½ÄÚ´æÖÐ
java.nio.MappedByteBuffer buffer= channel.map(FileChannel.MapMode.READ_WRITE, start, len);
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*******************************************************************************************************
Filename: ftp.java
Author: leetsing(elove)
Create date: 2004-08-30
Use: connect to FTP server,then upload and download file
Modify date: 2004-09-05 add to upload file
2004-09-13 add to downl ......
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