public static void main(String[] args) { if(isWindows()){ System.out.println("This is Windows"); }else if(isMac()){ System.out.println("This is Mac"); }else if(isUnix()){ System.out.println("This is Unix or Linux"); }else{ System.out.println("Your OS is not support!!"); } } 检测数据库好像不行。。。。。