字符转换流

 public static void main(String[] args) throws Exception {
        //  字符转换编码
        //  定义一个输出流
        OutputStream os = new FileOutputStream("src//outInputStream.txt");
        //  将原始字节输出流转换成字符输出流
        Writer osw = new OutputStreamWriter(os,"GBK");// 指定字符编码
        //  将低级字符流转换成高级字符缓冲输出流
        BufferedWriter bw = new BufferedWriter(osw);

        bw.write("abc哈喽");
        bw.write("abc哈喽");
        bw.write("abc哈喽");
        bw.close();
    }