转换流的字符编码

import java.io.*;
class EncodeStream 
{
public static void main(String[] args) throws IOException
{
writeText();
}
public static void writeText() throws IOException
{
//字符到字节的桥梁
OutputStreamWriter osw = 
new OutputStreamWriter(new FileOutputStream("utf.txt"),"UTF-8");


osw.write("你好");


osw.close();
}
}