Java IO 流 -- 转换流: InputStreamReader OutputStreamWriter

java 中转换流是以字符流的形式操作字节流，需要注意一下两点：

1、操作内容必须是纯文本

2、指定字符集避免乱码

操作控制台输入输出：

try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

				BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));) {

			String msg = "";

			while (!msg.equals("exit")) {

				msg = br.readLine();

				bw.write(msg);

				bw.newLine();

				bw.flush();

			}

		} catch (IOException e) {

			e.printStackTrace();

		}

这里没有指定字符集是因为控制台和工程的字符集一致，不会乱码

操作网络流：

try (BufferedReader read = new BufferedReader(

				new InputStreamReader(new URL("http://www.baidu.com").openStream(),"utf-8"));

				BufferedWriter writer = new BufferedWriter(

						new OutputStreamWriter(new FileOutputStream("baidu.html"),"utf-8"));

		) {

			String msg = "";

			while ((msg = read.readLine()) != null) {

				System.out.println(msg);

				writer.write(msg);

				writer.newLine();

			}

			writer.flush();

		} catch (IOException e) {

			e.printStackTrace();

		}

基本就这样的套路，一般为了提高性能都会套上BufferedRead 和 BufferredWrite。

巴特西

Java IO 流 -- 转换流: InputStreamReader OutputStreamWriter

操作控制台输入输出：

操作网络流：

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