在命令行应用程序中接受安全登陆

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import java.io.Console;
import java.util.Arrays;public class ConsoleApp {private static final int MAX_LOGINS = 3;//最多输入三次密码public static void main(String[] args) {// TODO Auto-generated method stubConsoleApp app = new ConsoleApp();if(app.login()){System.out.println("Thanks for logging in!");}else{System.out.println("Login failed!");}}private boolean login(){Console console = System.console();//获取Console类的实例boolean isAuthenticated = false;if(console!=null){int count=0;do {char[] pwd = console.readPassword("[%s]","Password:");isAuthenticated = authenticate(pwd);//delete password from memoryArrays.fill(pwd,' ');//清空密码console.writer().write("\n");} while (!isAuthenticated&&++count<MAX_LOGINS);}return isAuthenticated;}private boolean authenticate(char[] passwd){char[] secret = {'M','c','G','R','A','W','H','I','L','L'};//McGRAWHILL为密码if(java.util.Arrays.equals(passwd,secret)){java.util.Arrays.fill(passwd,' ');System.out.println("Authenticated\n");return true;}else{System.out.println("Authentication failed\n");}return false;}}

注意是在命令行里面cmd,

I:

 cd  地址

javac xxx.java

java xxx

 

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