【发布时间】：2017-01-21 21:30:26
【问题描述】：
我知道那里有数据，因为当我遍历列表时，我可以看到我所有的数据都在那里。即使只是打印我的数据似乎也不错，但我只是不知道为什么它似乎无法让它显示出来
我填充数据库的方法：
protected void populateDatabase() throws SQLException {
empInfoTable = new TableView<>();
empIDColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("employeeID"));
fNameColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("firstName"));
lNameColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("lastName"));
gNameColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("groupName"));
hoursColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("estimatedHours"));
payColumn.setCellValueFactory(new PropertyValueFactory<EmployeeMaster, String>("estimatedPay"));
List<EmployeeMaster> empList = getEmpFromDatabase();
Iterator<EmployeeMaster> iterator = empList.iterator();
System.out.print(iterator.next());
empInfoTable.getItems().addAll(empList);
//System.out.print(empInfoTable.getItems());
}
从数据库中获取数据的方法
private List<EmployeeMaster> getEmpFromDatabase() throws SQLException {
List<EmployeeMaster> row = new ArrayList<EmployeeMaster>();
Connection connect = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/AUStudentEmployees", "root",
"password");
Statement stmnt = connect.createStatement();
ResultSet result = stmnt.executeQuery("select * from emp_info ORDER by EmployeeID");
while(result.next()){
String empID = result.getString("EmployeeID");
String fName = result.getString("FirstName");
String lName = result.getString("LastName");
String gName = result.getString("GroupName");
String hours = result.getString("EstimatedHours");
String pay = result.getString("EstimatedPay");
EmployeeMaster empInfo = new EmployeeMaster(empID, fName, lName, gName, hours, pay);
row.add(empInfo);
//empInfoTable.getItems().addAll(row);
//System.out.print(row);
}
return row;
}
具有所有字符串属性的类：
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
public class EmployeeMaster {
public EmployeeMaster(){
}
private final StringProperty employeeID = new SimpleStringProperty(this, "EmployeeID");
private final StringProperty firstName = new SimpleStringProperty(this, "FirstName");
private final StringProperty lastName = new SimpleStringProperty(this, "LastName");
private final StringProperty groupName = new SimpleStringProperty(this, "GroupName");
private final StringProperty estimatedHours = new SimpleStringProperty(this, "EstimatedHours");
private final StringProperty estimatedPay = new SimpleStringProperty(this, "EstimatedPay");
public StringProperty employeeIDProperty(){
return employeeID;
}
public StringProperty firstNameProperty(){
return firstName;
}
public StringProperty lastNameProperty(){
return lastName;
}
public StringProperty groupNameProperty(){
return groupName;
}
public StringProperty estimatedHoursProperty(){
return estimatedHours;
}
public StringProperty EstimatedPayProperty(){
return estimatedPay;
}
public final String getEmployeeID() {
return employeeIDProperty().get();
}
public final String getFirstName() {
return firstNameProperty().get();
}
public final String getLastName() {
return lastNameProperty().get();
}
public final String getGroupName() {
return groupNameProperty().get();
}
public final String getEstimatedHours() {
return estimatedHoursProperty().get();
}
public final String getEstimatedPay() {
return EstimatedPayProperty().get();
}
public final void setEmployeeID(String EmployeeID){
employeeIDProperty().set(EmployeeID);
}
public final void setFirstName(String fName){
firstNameProperty().set(fName);
}
public final void setLastName(String lName){
lastNameProperty().set(lName);
}
public final void setGroupName(String gName){
groupNameProperty().set(gName);
}
public final void setEstimatedHours(String EstimatedHours){
estimatedHoursProperty().set(EstimatedHours);
}
public final void setEstimatedPay(String EstimatedPay){
EstimatedPayProperty().set(EstimatedPay);
}
public EmployeeMaster(String EmployeeID, String fName, String lName, String gName,
String EstimatedHours, String EstimatedPay){
setEmployeeID(EmployeeID);
setFirstName(fName);
setLastName(lName);
setGroupName(gName);
setEstimatedHours(EstimatedHours);
setEstimatedPay(EstimatedPay);
}
}
编辑：fxml 文件
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="300.0" prefWidth="650.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="studentempsignin.Admin_Controller">
<children>
<TableView layoutX="25.0" layoutY="29.0" onSort="#populateDatabase" prefHeight="166.0" prefWidth="600.0">
<columns>
<TableColumn fx:id="empIDColumn" prefWidth="100.0" text="Employee ID" />
<TableColumn fx:id="fNameColumn" prefWidth="100.0" text="First Name" />
<TableColumn fx:id="lNameColumn" prefWidth="100.0" text="Last Name" />
<TableColumn fx:id="gNameColumn" prefWidth="100.0" text="Group" />
<TableColumn fx:id="hoursColumn" prefWidth="100.0" text="Hours" />
<TableColumn fx:id="payColumn" prefWidth="100.0" text="Pay" />
</columns>
</TableView>
</children>
</AnchorPane>
【问题讨论】：
-
我试过了（我也添加了
TableColumns）并且它有效。你能发布完整的代码吗？您如何创建表格以及如何填充列？ -
真的有效吗？我使用scenebuilder创建表。填充列是什么意思？我不认为我这样做了。 empInfoTable.getItems().addAll(empList) 不会填充列吗？
-
是的。我在
setCellValueFactory调用之后添加了empInfoTable.getColumns().addAll(empIDColumn, fNameColumn, lNameColumn, gNameColumn, hoursColumn, payColumn);之类的列，然后一切正常。这就是@Guenther 在他的回答中提出的。但是在您的情况下，因为您已经从 FXML 注入了表，所以问题是这一行empInfoTable = new TableView<>();。在这里，您重新初始化TableView（它已经由FXMLLoader初始化），因此您丢失了 FXML 文件中添加的列。删除此行，我想它无需任何额外修改即可工作。 -
添加（至少）
initialize()方法。为什么要在onSort处理程序中填充表？