java 转换流

charset

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();
}

}