Java IO 流
/* * 将 键盘输入到控制台的 字符 存入 文件中 * * InputStreamReader 字节流->字符流 * OutStreamWriter 字符流->字节流 */BufferedReader br = new BufferedReader(new InputStreamReader(System.in));//BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("a.txt")));BufferedWriter bw = new BufferedWriter(new FileWriter("a.txt"));while(br.readLine()!=null){String line = br.readLine();System.out.println(line);if("over".equals(line)) return;bw.write(line);bw.flush();}??