javafx tableview不在所有列中显示数据

falq053o  于 2021-07-06  发布在  Java
关注(0)|答案(2)|浏览(497)

好吧,刚接触java几个星期,但已经编程30年了。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,其中包含填充的数据字段。我确信我遗漏了一些东西,并且已经在这里浏览了类似的问题。
APU 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apu 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>

谢谢你的回答。在不区分大小写的语言中已经有很多年了。对于我来说,这是一个快速而肮脏的练习来学习java和最新最棒的东西,或者我想说的是新的令人兴奋的技术(下一步!)
对于那些看了答案还没有完全理解的人来说,这里有一些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;
        }
    }
}
f0brbegy

f0brbegy1#

这个问题实际上是:javafx propertyvaluefactory没有填充tableview,但是我将特别说明您的具体情况,所以很清楚。
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“name”是在propertyvaluefactory构造函数中指定的字符串。getter和setter中属性名的第一个字母是大写的(根据javabean命名约定)。
为什么你的应用程序不工作
有以下三种表达方式:

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

对于示例属性,propertyvaluefactory将查找以下方法:

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

你有这三件事要做 sresult 班级:

getDateEntered()
getcDesc()
getEnteredBy()

仅限 getDateEntered() 将由propertyvaluefactory获取,因为它是 sresult 班级。
建议
如果希望propertyvaluefactory中的反射正常工作,就必须采用java标准(另一种方法是不使用propertyvaluefactory,而是从头开始编写自己的单元工厂)。
采用javacamelcase命名约定还可以使java开发人员更容易阅读代码。

vpfxa7rd

vpfxa7rd2#

对于其他人谁仍然没有得到它后,通过上述,我的问题是,我没有指定我的二传与“公共最终”指定。

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