javafx - JavaFX TableView未在所有列中显示数据

好的，几周后才接触Java，但已经进行了30年的编程。执行以下代码，但只有第一列显示任何内容。数据对象显示了多行数据，并且填充了数据字段。我确定我缺少了一些东西，并且在这里仔细研究了类似的问题。

APVoucher_batchgridController.java

import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.Initializable;
import javafx.fxml.FXML;
import javafx.scene.control.TableView;
import javafx.scene.input.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.control.TableColumn;
import javafx.scene.control.cell.PropertyValueFactory;

/**
 * FXML Controller class
 *
 * @author kmitchell
 */
public class APVoucher_batchgridController implements Initializable {

    public TableView tblMainList;
    public TableColumn colDateEntered;
    public TableColumn colCreatedBy;
    public TableColumn colDescription;

    /**
     * Initializes the controller class.
     */
    @Override
    public void initialize(URL url, ResourceBundle rb) {

    }

    @FXML
    public void opentables(ActionEvent event) {

        Object forName = null;
        Connection conn = null;
        Statement stmt = null;

        ResultSet rs = null;

        colDateEntered.setCellValueFactory(new PropertyValueFactory<sresult, String>("DateEntered"));

        colDescription.setCellValueFactory(new PropertyValueFactory<sresult, String>("cDesc"));

        colCreatedBy.setCellValueFactory(new PropertyValueFactory<sresult, String>("CreatedBy"));

        try {
            // load the driver into memory
            forName = Class.forName("jstels.jdbc.dbf.DBFDriver2");

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

        try {
            conn = DriverManager.getConnection("jdbc:jstels:dbf:e:\\keystone-data\\keyfund\\seymour\\keyfund.dbc");
        } catch (SQLException ex) {
            Logger.getLogger(APVoucher_batchgridController.class.getName()).log(Level.SEVERE, null, ex);
        }

        if (conn != null) {
            try {
                stmt = conn.createStatement();
            } catch (SQLException ex) {
                Logger.getLogger(APVoucher_batchgridController.class.getName()).log(Level.SEVERE, null, ex);
            }

            if (stmt != null) {

                // execute a query
                try {
                    ObservableList<Object> data = FXCollections.observableArrayList();

                    rs = stmt.executeQuery("SELECT denteredon, cdesc, ccreatedby FROM apvbatch WHERE ldeleted = false ORDER BY denteredon DESC");

                    while (rs.next()) {

                        String enteredon = rs.getString("denteredon");
                        String desc = rs.getString("cdesc");
                        String createdby = rs.getString("ccreatedby");

                        sresult row = new sresult(createdby, enteredon, desc);

                        data.add(row);
                    }

                    tblMainList.setItems(data);

                    tblMainList.setVisible(true);


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

    public class sresult {

        private String DateEntered;
        private String EnteredBy;
        private String cDesc;

        public sresult(String T, String d, String c) {
            this.EnteredBy = T;
            this.DateEntered = d;
            this.cDesc = c;
        }

        public String getEnteredBy() {
            return EnteredBy;
        }

        public void setEnteredBy(String T) {
            EnteredBy = T;
        }

        public String getDateEntered() {
            return DateEntered;
        }

        public void setDateEntered(String d) {
            DateEntered = d;
        }

        public String getcDesc() {
            return cDesc;
        }

        public void setcDesc(String c) {
            cDesc = c;
        }
    }
}

和APVoucher_batchgrid.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.net.*?>
<?import java.util.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>

<AnchorPane id="AnchorPane" fx:id="batchlistform" prefHeight="400.0" prefWidth="600.0" styleClass="mainFxmlClass" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="keystone.APVoucher_batchgridController">
  <children>
    <BorderPane layoutX="0.0" layoutY="0.0" prefHeight="400.0" prefWidth="600.0">
      <center>
        <AnchorPane prefHeight="-1.0" prefWidth="-1.0">
          <children>
            <Pane layoutX="0.0" layoutY="0.0" prefHeight="53.0" prefWidth="580.0">
              <children>
                <Label layoutX="7.0" layoutY="9.0" prefWidth="202.0" text="AP Vouchers Batch List">
                  <font>
                    <Font name="System Bold" size="14.0" />
                  </font>
                </Label>
                <Button fx:id="btnClose" cancelButton="true" layoutX="513.0" layoutY="27.0" mnemonicParsing="false" text="Close" />
                <Button id="btnClose" fx:id="apvRefresh" cancelButton="true" layoutX="185.0" layoutY="27.0" mnemonicParsing="false" onAction="#opentables" text="Refresh" />
              </children>
            </Pane>
            <TableView fx:id="tblMainList" layoutX="0.0" layoutY="53.0" prefHeight="323.0" prefWidth="580.0">
              <columns>
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="91.0" text="Date Entered" fx:id="colDateEntered" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="100.0" text="Created By" fx:id="colCreatedBy" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="261.0" text="Description" fx:id="colDescription" />
              </columns>
            </TableView>
          </children>
        </AnchorPane>
      </center>
      <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
      </padding>
    </BorderPane>
  </children>
  <stylesheets>
    <URL value="@apvoucher_batchgrid.css" />
  </stylesheets>
</AnchorPane>

谢谢你的答案。不区分大小写的语言已使用多年。对于我来说，这是一个快速而又肮脏的练习，学习Java和最新最好的东西，或者我喜欢说新的令人兴奋的技术（NExT！）。

对于正在寻找答案但仍不完全了解的人，这是使代码正常工作的更改。

colDateEntered.setCellValueFactory(new PropertyValueFactory<sresult, String>("Denteredon"));
colDescription.setCellValueFactory(new PropertyValueFactory<sresult, String>("CDesc"));
colEnteredBy.setCellValueFactory(new PropertyValueFactory<sresult, String>("Ccreatedby"));


    public class sresult {

        private String Denteredon;
        private String Ccreatedby;
        private String CDesc;

        public sresult(String T, String d, String c) {
            this.Ccreatedby = T;
            this.Denteredon = d;
            this.CDesc = c;
        }

        public String getCcreatedby() {
            return Ccreatedby;
        }

        public void setCreatedby(String T) {
            Ccreatedby = T;
        }

        public String getDenteredon() {
            return Denteredon;
        }

        public void setDenteredon(String d) {
            Denteredon = d;
        }

        public String getCDesc() {
            return CDesc;
        }

        public void setCDesc(String c) {
            CDesc = c;
        }
    }
}

最佳答案

这个问题确实是重复的：Javafx PropertyValueFactory not populating Tableview，但是我将专门解决您的特定情况，因此很明显。

背景

PropertyValueFactory使用反射来确定获取和设置数据值以及从模型类检索可绑定属性的方法。遵循的模式是：

PropertyValueType getName()
void setName(PropertyValueType value)
PropertyType nameProperty()

其中“名称”是PropertyValueFactory构造函数中指定的字符串。 getter和setter中属性名称的首字母大写（通过java bean命名约定）。

为什么您的应用程序无法正常工作

您具有以下三个表达式：

new PropertyValueFactory<sresult, String>("DateEntered")
new PropertyValueFactory<sresult, String>("cDesc")
new PropertyValueFactory<sresult, String>("CreatedBy")

对于您的示例属性，PropertyValueFactory将寻找以下方法：

"DateEntered" => getDateEntered()
"cDesc" => getCDesc()
"CreatedBy" => getCreatedBy()

您的sresult类上有以下三个getter：

getDateEntered()
getcDesc()
getEnteredBy()

PropertyValueFactory将仅拾取getDateEntered()，因为这是sresult类中定义的唯一匹配方法。

忠告

如果要使PropertyValueFactory中的反射起作用，则必须采用Java标准（替代方案是不使用PropertyValueFactory，而是从头开始编写自己的单元工厂）。

采用Java camel case naming conventions还可以使Java开发人员更轻松地阅读您的代码。

关于javafx - JavaFX TableView未在所有列中显示数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/60885870/