使用此代码，我在单击获取按钮（由代码中的doFetch（）表示）后从comport获取数据（数据基本上是我的rfid标签的UID）。当我必须获取另一个rfid标签的数据时，我又必须按下获取按钮。我希望它以某种方式工作，一旦我单击“获取”按钮，它就会在点击时自动显示rfid标签的数据，然后在点击时显示另一个rfid标签的数据。意味着我要避免一次又一次单击获取按钮。 基本上我是从comport读取rfid标签的UID，然后它与数据库中的UID匹配，并在tableView中显示与该UID相关的整个数据。 我希望它只需要按一次提取按钮就可以工作，然后希望它在点击rfid标签时继续在tableView中显示数据。
这是我的控制器代码：
public class detectController {
@FXML
private ResourceBundle resources;
@FXML
private URL location;
@FXML
private TableView<detectBean> tableView;
@FXML
private TextField txtSTID;
ObservableList<detectBean> list;
public static SerialPort s1;
static String temp="";
static String temp1="";
static void doAlert(String msg)
{
Alert alert=new Alert(AlertType.INFORMATION);
alert.setTitle("Alert..");
alert.setContentText(msg);
alert.show();
}
ObservableList<detectBean> getRecordsFromTableSome(String sID) throws FileNotFoundException
{
list=FXCollections.observableArrayList();
try {
pst=con.prepareStatement("select * from stuRegis where studentID=?");
pst.setString(1, sID);
ResultSet rs= pst.executeQuery();
while(rs.next())
{
String studentID1=rs.getString("studentID");
String studentID = studentID1.substring(1);
String name=rs.getString("name");
String sroll=rs.getString("sroll");
String clas=rs.getString("clas");
String fname=rs.getString("fname");
String contact=rs.getString("contact");
String pic = rs.getString("pic");
FileInputStream photo=new FileInputStream(pic);
Image image1 = new Image(photo, 100, 100, false, false);
Date dob=rs.getDate("dob");
String dobb=dob.toString();
Date dos=rs.getDate("dos");
String doss=dos.toString();
detectBean bean=new detectBean(studentID, name, sroll, clas, fname, contact, new ImageView(image1), dobb, doss );
list.add(bean);
}
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
ObservableList<detectBean> getRecordsFromTable() throws FileNotFoundException
{
list=FXCollections.observableArrayList();
try {
pst=con.prepareStatement("select * from stuRegis");
ResultSet rs= pst.executeQuery();
while(rs.next())
{
String studentID1=rs.getString("studentID");
String studentID = studentID1.substring(1);
String name=rs.getString("name");
String sroll=rs.getString("sroll");
String clas=rs.getString("clas");
String fname=rs.getString("fname");
String contact=rs.getString("contact");
String pic = rs.getString("pic");
FileInputStream photo=new FileInputStream(pic);
Date dob=rs.getDate("dob");
String dobb=dob.toString();
Date dos=rs.getDate("dos");
String doss=dos.toString();
Image image1 = new Image(photo, 100, 100, false, false);
detectBean bean=new detectBean(studentID, name, sroll, clas, fname, contact, new ImageView(image1), dobb, doss);
list.add(bean);
}
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
@FXML
void doDelete(ActionEvent event) {
int selectedIndex = tableView.getSelectionModel().getSelectedIndex();
detectBean asm = (detectBean)tableView.getSelectionModel().getSelectedItem();
String selectedItem = asm.getStudentID();
if (selectedIndex >= 0) {
try {
pst = con.prepareStatement("DELETE FROM stuRegis WHERE studentID = ?");
pst.setString(1, selectedItem);
pst.execute();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
tableView.getItems().remove(selectedIndex);
} else {
doAlert("Record deleted successfully");
}
}
@FXML
void doExcel(ActionEvent event) {
try {
writeExcel();
doAlert("Exported to excel..");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void writeExcel() throws Exception {
Writer writer = null;
try {
FileChooser chooser=new FileChooser();
chooser.setTitle("Select Path:");
chooser.getExtensionFilters().addAll(
new FileChooser.ExtensionFilter("All Files", "*.*")
);
File file=chooser.showSaveDialog(null);
String filePath=file.getAbsolutePath();
if(!(filePath.endsWith(".csv")||filePath.endsWith(".CSV")))
{
doAlert("The File name must have .csv extension");
return;
}
file = new File(filePath);
writer = new BufferedWriter(new FileWriter(file));
String text="Student ID, Name, Roll No., Class, Father's Name, Contact No., Date of Birth, Date of Admission\n";
writer.write(text);
for (detectBean p : list)
{
text = p.getStudentID()+ "," +p.getName()+ "," + p.getSroll()+ "," + p.getClas()+ "," + p.getFname()+ "," + p.getContact()+"," + p.getDob()+"," + p.getDos()+"\n";
writer.write(text);
}
} catch (Exception ex) {
ex.printStackTrace();
}
finally {
writer.flush();
writer.close();
}
}
/////////////////////////////////////////////////////
@FXML
void doFetch(ActionEvent event) throws IOException{
//while(true){
String a = recall();
txtSTID.setText(a.substring(1));
ObservableList<detectBean> list=getRecordsFromTableSome(a);
//tableView.setItems(list);
tableView.getItems().addAll(list);
//}
}
@FXML
void doReset(ActionEvent event) {
txtSTID.setText("");
tableView.getItems().clear();
}
@FXML
void doFetchAll(ActionEvent event)throws FileNotFoundException {
ObservableList<detectBean> list=getRecordsFromTable();
tableView.setItems(list);
}
@FXML
void doComClose(ActionEvent event) {
if(s1.closePort()){
doAlert("Port Closed");
System.out.println("Port closed successFully");
}else{
doAlert("Failed to Close Port");
System.out.println("Failed to close port");
}
}
@FXML
void doOpenCom(ActionEvent event) {
port();
}
/////////////////////////////////////////////////////
public static void port()
{
SerialPort[] s=SerialPort.getCommPorts();
for(SerialPort port:s){
System.out.println(""+port.getSystemPortName());
s1=SerialPort.getCommPort(port.getSystemPortName());
if(s1.openPort()){
doAlert("Port Opened");
System.out.println("Port opened successFully ");
}else{
doAlert("Failed to Open Port");
System.out.println("Failed to open port");
}
}
s1.setBaudRate(9600);
s1.n
}
public static String recall() throws IOException
{
InputStream is=s1.getInputStream();
StringBuilder st = new StringBuilder();
for(int i=0,x=0;true;i++){
//for (int i =0;i<11;i++){
st=st.append((char)is.read());
temp1=st.toString();
if(temp1.length()==13)
{ System.out.print(temp1);
//System.out.print(temp);
//System.out.print(temp1.length());
break;
}
System.out.print(temp1);
}
//System.out.print(""+(char)is.read());
temp=temp1.substring(0,11);
System.out.print(temp.length());
System.gc();
return temp;
}
//////////////////////////////////////////////////////
PreparedStatement pst;
Connection con;
@FXML
void initialize() throws IOException, FileNotFoundException {
con=MysqlConnection.doConnect();
TableColumn<detectBean, String> studentID=new TableColumn<detectBean, String>("Student ID");//Dikhava Title
studentID.setCellValueFactory(new PropertyValueFactory<>("studentID"));//bean field name
studentID.setMinWidth(110);
TableColumn<detectBean, String> name=new TableColumn<detectBean, String>("Name");//Dikhava Title
name.setCellValueFactory(new PropertyValueFactory<>("name"));//bean field name
TableColumn<detectBean, String> sroll=new TableColumn<detectBean, String>("Roll No.");//Dikhava Title
sroll.setCellValueFactory(new PropertyValueFactory<>("sroll"));//bean field name
TableColumn<detectBean, String> clas=new TableColumn<detectBean, String>("Class");//Dikhava Title
clas.setCellValueFactory(new PropertyValueFactory<>("clas"));//bean field name
TableColumn<detectBean, String> fname=new TableColumn<detectBean, String>("Father's Name");//Dikhava Title
fname.setCellValueFactory(new PropertyValueFactory<>("fname"));//bean field name
fname.setMinWidth(110);
TableColumn<detectBean, String> contact=new TableColumn<detectBean, String>("Contact No.");//Dikhava Title
contact.setCellValueFactory(new PropertyValueFactory<>("contact"));//bean field name
contact.setMinWidth(90);
TableColumn<detectBean, Image> pic=new TableColumn<detectBean, Image>("Image");//Dikhava Title
pic.setCellValueFactory(new PropertyValueFactory<>("pic"));//bean field name
pic.setMinWidth(110);
TableColumn<detectBean, String> dob=new TableColumn<detectBean, String>("Date of Birth");
dob.setCellValueFactory(new PropertyValueFactory<>("dob"));//field name in bean
dob.setMinWidth(140);
TableColumn<detectBean, String> dos=new TableColumn<detectBean, String>("Date of Admission");
dos.setCellValueFactory(new PropertyValueFactory<>("dos"));//field name in bean
dos.setMinWidth(140);
tableView.getColumns().clear();
tableView.getColumns().addAll(studentID,name,sroll,clas,fname,contact,pic, dob, dos);
}
}