java: InputStreamReader将字节的输入流变成字符的输入流，OutputStreamWriter将字符的输出流变成字节的输出流

Posted 2020-09-29 穆晟铭

InputStreamReader：将字节的输入流变成字符的输入流，

OutputStreamWriter：将字符的输出流变成字节的输出流

 

		//将缓冲区的内容读取，可以一次读取
		//可以接收键盘的输入内容：需要用到字节转字符流的方法：InputStreamReader,OutputStreamWriter
		//BufferedReader
		BufferedReader buf = null;
		
		//将字节的输入流变成字符的输入流
		//InputStreamReader 
		buf = new BufferedReader( new InputStreamReader(System.in) );
		System.out.println("请输入：");
		String str = buf.readLine();
		buf.close();
		System.out.println("内容是：" + str);
		
		buf = new BufferedReader(new FileReader("F:"+File.separator+"work"+File.separator+"work"+File.separator+"write.txt") );
		String rstr = null;
		StringBuffer strbuf = new StringBuffer();
		while( (rstr = buf.readLine()) != null )
		{
			strbuf.append(rstr);
		}
		System.out.println("输出的内容是：");
		System.out.println(strbuf);
		
		//将字符的输出流变成字节的输出流
		//OutputStreamWriter
		FileWriter fw = new FileWriter("F:"+File.separator+"work"+File.separator+"work"+File.separator+"write.txt", true);
		BufferedWriter bwriter = new BufferedWriter(fw);
		bwriter.newLine();
		bwriter.write(str);
		bwriter.flush();
		bwriter.close();
		fw.close();