好的,几个星期以来java新手,但已经编程了30年。执行以下代码,但只有第一列显示任何内容。数据对象显示多行数据,并填入数据字段。我确定我遗漏了一些内容,并在此处查看了类似的问题。
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>
谢谢你的回答。在不区分大小写的语言中使用多年的方法。对我来说,学习java和最新版本是一个快速而又肮脏的练习。最棒的东西或者我喜欢说新的激动人心的技术(NExT!)
对于那些正在寻找答案而仍未完全了解的人来说,以下是使代码正常运行的更改。
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;
}
}
}
答案 0 :(得分:38)
这个问题实际上与Javafx PropertyValueFactory not populating Tableview重复,但我会专门针对您的具体案例,所以很清楚。
背景
PropertyValueFactory使用反射来确定获取和设置数据值的方法,以及从模型类中检索可绑定属性。接下来的模式是:
PropertyValueType getName()
void setName(PropertyValueType value)
PropertyType nameProperty()
其中“name”是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(通过java bean命名约定)。
为什么您的应用程序不起作用
你有这三个表达式:
new PropertyValueFactory<sresult, String>("DateEntered")
new PropertyValueFactory<sresult, String>("cDesc")
new PropertyValueFactory<sresult, String>("CreatedBy")
对于您的样本属性,PropertyValueFactory将查找以下方法:
"DateEntered" => getDateEntered()
"cDesc" => getCDesc()
"CreatedBy" => getCreatedBy()
你的sresult
课上有三个吸气剂:
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。
建议
如果您希望PropertyValueFactory中的反射起作用,则必须采用Java标准(替代方法是不使用PropertyValueFactory,而是从头开始编写自己的单元工厂)。
采用Java camel case naming conventions也使Java开发人员更容易阅读您的代码。
答案 1 :(得分:0)
有时由于列名,列不显示数据。例如,
new PropertyValueFactory<sresult, String>("cDesc")
和 getter
是 getcDesc cDesc
列可能不显示数据。如果您将代码更改为
new PropertyValueFactory<sresult, String>("CDesc")
和 getter
是 getCDesc CDesc
列可以显示数据。
答案 2 :(得分:-1)
对于那些在完成上述操作后仍然没有得到它的人,我的问题是我没有用“公共最终”指定我的安装人员。