重构各页面代码，从h文件改为cpp文件；

添加硬件接口并添加，readerAPI使用硬件接口获取invenory信息和connect；
完成开卡初始页面，获取卡号和学号。

databaseAPI.cpp

@@ -0,0 +1,64 @@
+#include "databaseAPI.h"
+
+Database::Database(QSqlDatabase database)
+{
+    db = database;
+    db.setDatabaseName(databaseName);
+    db.setUserName(userName);
+}
+
+Database::Database(QSqlDatabase database, QString hostName, int port, QString password)
+{
+    db = database;
+    db.setDatabaseName(databaseName);
+    db.setUserName(userName);
+    db.setHostName(hostName);
+    db.setPort(port);
+    db.setPassword(password);
+}
+
+QSqlDatabase Database::getDatabase()
+{
+    return db;
+}
+
+void Database::setHostName(QString hostName)
+{
+    db.setHostName(hostName);
+}
+
+QString Database::getHostName()
+{
+    return db.hostName();
+}
+
+void Database::setPort(int port)
+{
+    db.setPort(port);
+}
+
+int Database::getPort()
+{
+    return db.port();
+}
+
+void Database::setPassword(QString password)
+{
+    db.setPassword(password);
+}
+
+bool Database::is_connected()
+{
+    return connected;
+}
+
+bool Database::open()
+{
+    connected = db.open();
+    return connected;
+}
+
+Database::~Database()
+{
+    db.close();
+}