try{

RandomAccessFile rf=new RandomAccessFile("e:\\my.txt","rw");

String str="中文";

byte [] b;

b=str.getBytes();

rf.write(b);//中文就写入文本文件了。

}

catch(Exception e){}

try{

BufferedReader br=new BufferedReader(new FileReader("e:\\my.txt"));

while((line=br.readLine())!=null)

{

System.out.println(line);//读取文件

}}

catch(Exception e){}