转换流

一、字节输入流转字符输入流InputStreamReader

构造方法

OutputStreamWriter(OutputStream out) 创建使用默认字符编码的 OutputStreamWriter。

BufferedReader rs= new BufferedReader(new InputStreamReader(new BufferedInputStream(new FileInputStream("D:/test.txt"))));

二、字节输出流转字符输出流OutputStreamWriter

构造方法

InputStreamReader(InputStream in) 创建一个使用默认字符集的 InputStreamReader。

BufferedWriter rw=new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream("D:/test.txt"))));

三、使用

	public static void main(String[] args) throws IOException {
		//1.选择流
		BufferedReader rs= new BufferedReader(new InputStreamReader(new BufferedInputStream(new FileInputStream("D:/hehe.txt"))));
		BufferedWriter rw=new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream("D:/D.txt"))));
		//2.选择流
		String str=null;
		while((str=rs.readLine())!=null){
			rw.append(str);
		}
		//3.刷出
		rw.flush();
		//4.关闭
		rw.close();
		rs.close();
	}