Question

我无法从sqlite数据库填充数据。它只是在表格中显示单元格，但没有数据。我是javafx的新手，如果有任何重大错误，请原谅我。

这是控制器类

public class ReportController implements Initializable {

//report page variables
@FXML private Label nameLabelReport;
@FXML private Label addressLabelReport;
@FXML private TextField memberIdField;
@FXML private TextField locationField;
@FXML private Button memberSearchBtn;
@FXML private Button locationSearchBtn;
 //Report table variables
@FXML private TableView reportTable;
@FXML private TableColumn memberColumn;
@FXML private TableColumn nameColumn;
@FXML private TableColumn addressColumn;
@FXML private TableColumn phoneNoColumn;
@FXML private TableColumn emailColumn;
@FXML private TableColumn designationColumn;
@FXML private TableColumn siteNoColumn;
@FXML private TableColumn locationColumn;
@FXML private TableColumn sqftColumn;
@FXML private TableColumn totalAmtColumn;
@FXML private TableColumn advanceColumn;
@FXML private TableColumn toBePaidColumn;
private static Connection con;
private static Statement stat;
private PreparedStatement prep;
private static ObservableList<UserData> data;

@FXML
protected void handleReportSearch(MouseEvent event) throws IOException {

         System.out.println("Entered else");
        try {
            con = DriverManager.getConnection("jdbc:sqlite:housing_society.db");
            stat = con.createStatement();
            System.out.println("Entered else");

            String location;

            location = locationField.getText();
            System.out.println("Connected to database "+location);
            ResultSet rs = con.createStatement().executeQuery("SELECT * FROM society_members WHERE site_location like '"+ location + "'");
            while (rs.next()) {
                UserData userData = new UserData(rs.getString("membership_id"), rs.getString("name"), rs.getString("address"), rs.getString("phone_number"), rs.getString("email"), rs.getString("working_organization"), rs.getString("designation"), rs.getString("site_no"), rs.getString("site_location"), rs.getFloat("per_square_feet_charges"),rs.getFloat("total_amount"), rs.getFloat("paid_in_advance"), rs.getFloat("to_be_paid"));

                data.add(userData);
             }   





        } catch (SQLException ex) {
            Logger.getLogger(LoginController.class.getName()).log(Level.SEVERE, null, ex);
        }

    }
}

@Override
public void initialize(URL url, ResourceBundle rb) {
    memberColumn.setCellValueFactory(new PropertyValueFactory("membershipID") );
           nameColumn.setCellValueFactory(new PropertyValueFactory("Name") );
           addressColumn.setCellValueFactory(new PropertyValueFactory("address") );
           phoneNoColumn.setCellValueFactory(new PropertyValueFactory("phoneNo") );
           emailColumn.setCellValueFactory(new PropertyValueFactory("email") );
           designationColumn.setCellValueFactory(new PropertyValueFactory("designation") );
           siteNoColumn.setCellValueFactory(new PropertyValueFactory("siteNo") );
           locationColumn.setCellValueFactory(new PropertyValueFactory("location") );
           sqftColumn.setCellValueFactory(new PropertyValueFactory("perSqFt") );
           totalAmtColumn.setCellValueFactory(new PropertyValueFactory("totalAmt") );
           advanceColumn.setCellValueFactory(new PropertyValueFactory("paidInAdvance") );
           toBePaidColumn.setCellValueFactory(new PropertyValueFactory("toBePaid") );

           data = FXCollections.observableArrayList();
           reportTable.setItems(data);

}

private static class UserData {

    public StringProperty membershipID;
    public StringProperty Name;
    public StringProperty address;
    public StringProperty phoneNo;
    public StringProperty email; 
    public StringProperty workingOrganization;
    public StringProperty designation;
    public StringProperty siteNo;
    public StringProperty location;
    public FloatProperty perSqFt;
    public FloatProperty totalAmt;
    public FloatProperty paidInAdvance;
    public FloatProperty toBePaid;

    public UserData(String membershipID, String Name, String address,String phoneNo, String email, String workingOrganization, String designation, String siteNo, String location, float perSqFt, float totalAmt, float paidInAdvance, float toBePaid) {
        this.membershipID = new SimpleStringProperty(membershipID);
        this.Name = new SimpleStringProperty(Name);
        this.address = new SimpleStringProperty(address);
        this.phoneNo = new SimpleStringProperty(phoneNo);
        this.email = new SimpleStringProperty(email);
        this.workingOrganization = new SimpleStringProperty(workingOrganization);
        this.designation = new SimpleStringProperty(designation);
        this.location = new SimpleStringProperty(location);
        this.siteNo = new SimpleStringProperty(siteNo);
        this.perSqFt = new SimpleFloatProperty(perSqFt);
        this.totalAmt = new SimpleFloatProperty(totalAmt);
        this.paidInAdvance = new SimpleFloatProperty(paidInAdvance);
        this.toBePaid = new SimpleFloatProperty(toBePaid);

    }

    public StringProperty getMembershipID() {
        return membershipID;
    }

    public StringProperty getName() {
        return Name;
    }

    public StringProperty getAddress() {
        return address;
    }

    public StringProperty getPhoneNo() {
        return phoneNo;
    }

    public StringProperty getEmail() {
        return email;
    }

    public StringProperty getWorkingOrganization() {
        return workingOrganization;
    }

    public StringProperty getDesignation() {
        return designation;
    }

    public StringProperty getSiteNo() {
        return siteNo;
    }

    public StringProperty getLocation() {
        return location;
    }

    public FloatProperty getPerSqFt() {
        return perSqFt;
    }

    public FloatProperty getTotalAmt() {
        return totalAmt;
    }

    public FloatProperty getPaidInAdvance() {
        return paidInAdvance;
    }

    public FloatProperty getToBePaid() {
        return toBePaid;
    }
}

}

我不会包含FXML文件，因为它会使这个问题变得非常庞大和复杂。我只会添加必要的行。

链接到控制器

 <BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="720.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="postalhs.ReportController">

这是按钮标签。点击后会调用handleReportSearch方法

<Button onMouseClicked="#handleReportSearch" fx:id="locationSearchBtn" layoutX="344.0" layoutY="172.0" mnemonicParsing="false" text="Search" />

的TableView

<TableView fx:id="reportTable" prefHeight="238.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0">
      <columns>
          <TableColumn fx:id="memberColumn" prefWidth="93.0" text="Membership ID" />
          <TableColumn fx:id="nameColumn" prefWidth="57.0" text="Name" />
          <TableColumn fx:id="addressColumn" prefWidth="60.0" text="Address" />
          <TableColumn fx:id="phoneNoColumn" prefWidth="90.0" text="Phone Number" />
          <TableColumn fx:id="emailColumn" prefWidth="69.0" text="Email" />
          <TableColumn fx:id="designationColumn" prefWidth="81.0" text="Designation" />
          <TableColumn fx:id="siteNoColumn" prefWidth="75.0" text="Site Number" />
          <TableColumn fx:id="locationColumn" prefWidth="75.0" text="Site Location" />
          <TableColumn fx:id="sqftColumn" prefWidth="75.0" text="Per square feet charges" />
          <TableColumn fx:id="totalAmtColumn" prefWidth="75.0" text="Total Amount" />
          <TableColumn fx:id="advanceColumn" prefWidth="75.0" text="Paid in Advance" />
          <TableColumn fx:id="toBePaidColumn" prefWidth="75.0" text="To Be Paid" />
        </columns>
 </TableView>

Answer 1

JavaFX 8可能有所不同，但JavaFX 2需要Property方法才能反映，以便成功绑定值。修改符合Property方法约定的当前UserData类方法（或添加新方法）（即＆＃34; Property（）＆＃34;）。

像这样：

public StringProperty membershipIDProperty() {
    return membershipID;
}

javafx TableView不会从数据库中获取数据

1 个答案: