总结：BufferedReader。InputStreamReader.字节与字符的区别。

package com.ds;import java.io.*;//从控制台输入字符串，输到sdd时停止输入public class yuiy {	public static void main(String[] args) throws Exception {		BufferedReader b = new BufferedReader(new InputStreamReader(System.in));		String s;// 字符串、结果：输入字符串		System.out.println("enter your word");		do {			s = b.readLine();// 读取一行			System.out.println(s);		} while (!s.equals("sdd"));	}}