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InputStreamReader isr = new InputStreamReader(System.in);// 桥梁：字节流->字符流
BufferedReader br = new BufferedReader(isr);
String temp = br.readLine();
System.out.println(temp);
int b;
while ((b = System.in.read()) != -1) {
System.out.print((char) b);
}
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原文地址：http://www.cnblogs.com/klguang/p/4699556.html
