OutputStreamWriter 是字符流通向字节流的桥梁：可使用指定的 charset 将要写入流中的字符编码成字节。它使用的字符集可以由名称指定或显式给定，否则将接受平台默认的字符集。
import java.io.*; class EncodeStream
{
public static void main(String[] args) throws IOException
{
//writeText();
readText();
} public static void readText()throws IOException
{
InputStreamReader isr = new InputStreamReader(new FileInputStream("utf.txt"),"gbk"); char[] buf = new char[10];
int len = isr.read(buf); String str = new String(buf,0,len); System.out.println(str); isr.close();
}
public static void writeText()throws IOException
{
OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("utf.txt"),"UTF-8"); osw.write("你好"); osw.close();
} }