java 转换流

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();
	}

}