RamdonAccessFile 是个很好用的类，功能十分强大，可以利用它的length()和seek()方法来轻松实现文件的追加，相信我下面这个例子是很轻易看懂的，先写入十行，用length()读出长度（以byte为单位），在用seek()移动到文件末尾，继续添加，最后显示记录。
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import java.io.*;
public class IOStreamDemo {
public static void main(String[] args) {
try{
RandomAccessFile rf1 = new RandomAccessFile("d:\\jeru.txt","rw");
for (int i = 0; i < 10; i ) {
rf1.writeBytes("xixi,this is line " i "\n");
}
rf1.close();
int i = 0;
String record = new String();
RandomAccessFile rf2 = new RandomAccessFile("d:\\jeru.txt","rw");
rf2.seek(rf2.length());
rf2.writeBytes("lala,append line" "\n");
rf2.close();
RandomAccessFile rf3 = new RandomAccessFile("d:\\jeru.txt","r");
while ((record = rf3.readLine()) != null) {
i ;
System.out.println("Value " i ":" record); 文章来源于www.hot007.com
}
rf3.close();
}catch(Exception e){}
}
} www.hot007.com
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