QRegExp rx("[a-zA-Z0-9][a-zA-Z0-9.-]+$");/*限制第一位只能輸a-zA-Z0-9，之後只能輸入a-zA-Z0-9.-這幾類字符*/
QValidator *vali=new QRegExpValidator(rx,ui.lineEdit_host1);
ui.lineEdit_host1->setValidator(vali);
ui.lineEdit_host2->setValidator(vali);
ui.lineEdit_host1->setMaxLength(128);//限制輸入長度,最大爲128
ui.lineEdit_host2->setMaxLength(128);
QRegExp regx("[0-9]+$");//只能輸入數字
QValidator *validator=new QRegExpValidator(regx,ui.lineEdit_port1);
ui.lineEdit_port1->setValidator(new QIntValidator(0,65535,ui.lineEdit_port1));
ui.lineEdit_port2->setValidator(new QIntValidator(0,65535,ui.lineEdit_port2));
ui.lineEdit_port1->setMaxLength(5);
ui.lineEdit_port2->setMaxLength(5);
ui.lineEdit_HttpPort->setValidator(new QIntValidator(0,65535,ui.lineEdit_HttpPort));
ui.lineEdit_HttpPort->setMaxLength(5);
ui.lineEdit_ProxyPort1->setMaxLength(5);
QRegExp regx2("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)");//IP格式正則表達式，只能按照IP地址格式輸入。
QValidator *validator2=new QRegExpValidator(regx2,ui.lineEdit_HttpHost);
ui.lineEdit_HttpHost->setValidator(validator2);
ui.lineEdit_Dns1->setValidator(validator2);