java 控制台接收参数

public static void main(String[] args) {
		try {
			BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
		    BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));
		    bufw.write("请输入以下命令？");
			bufw.newLine();
			bufw.write("[加密]请输入1，   [解密]请输入2");
			bufw.newLine();
			bufw.flush();
			String line = null;
			while ((line = bufr.readLine()) != null) {
				if ("".equals(line)){
					bufw.write("程序已退出");
					bufw.newLine();bufw.flush();
					break;
				}else if("1".equals(line)){
					bufw.write("请输入要加密的字符串:");
					bufw.newLine();bufw.flush();
					line = bufr.readLine();
					String resultStr = TripleDES.encrypt(line);
					bufw.write("加密前: " + line);
					bufw.newLine(); // 换行
					bufw.write("加密后: " + resultStr);
					bufw.newLine(); // 换行
					bufw.newLine();bufw.flush();
				}else if("2".equals(line)){
					bufw.write("请输入要解密的字符串:");
					bufw.newLine();bufw.flush();
					line = bufr.readLine();
					String resultStr = TripleDES.decrypt(line);
					bufw.write("解密前: " + line);
					bufw.newLine(); // 换行
					bufw.write("解密后: " + resultStr);
					bufw.newLine(); // 换行
					bufw.newLine();bufw.flush();
				}
				break;
			}
			bufw.close(); // 关闭
		} catch (Exception e) {
			System.err.println("输入的密文有误:"+e.getMessage());
		}
	}