loading黑马程序员之IO键盘输入（2-3）

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package com.heima.io;

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class SystemInOutDemo {public static void main(String[] args) {printSystemIn2();}/** * 接受控制台输入，输入一行后打印  * 输入"exit"，退出 *  ctrl+c手动停止输入 */public static void printSystemIn() {InputStream in = System.in;try {StringBuilder sb = new StringBuilder();while (true) {int ch = in.read();if (ch == '\r')continue;if (ch == '\n') {String s = sb.toString();if("exit".equals(s))break;System.out.println(s);sb.delete(0, sb.length());}else{sb.append((char) ch);}}} catch (IOException e) {e.printStackTrace();}}/** * 接受控制台输入和按照UTF-8编码输出 * 转换流的使用场景：字符编码 */public static void printSystemIn2(){BufferedReader br = null;BufferedWriter bw = null;try {br = new BufferedReader(new InputStreamReader(System.in));bw = new BufferedWriter(new OutputStreamWriter(System.out,"UTF-8"));String line = null;while((line = br.readLine())!=null){if("over".equals(line)){break;}bw.write(line);bw.newLine();bw.flush();}} catch (IOException e) {e.printStackTrace();}finally{try {if(br!=null)br.close();} catch (Exception e) {e.printStackTrace();}try {if(bw!=null)bw.close();} catch (Exception e) {e.printStackTrace();}}}}

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