JavaFX - 从对象加载字符串到 TableView答案

【问题标题】：JavaFX - Load Strings to TableView from ObjectJavaFX - 从对象加载字符串到 TableView
【发布时间】：2016-04-02 15:46:36
【问题描述】：

我有一个问题，我无法从一个对象加载 3 个属性以显示在表格视图上。我有一个付款对象，它由一个受益人对象（由 3 个字符串组成 - 名称、帐号和代码）、一个金额字符串和一个参考字符串组成。如果它们都是同一个对象的一部分，我可以查看它们，但是当我将它们拆分时，它不会引起问题并且单元格是空白的。

以下是我的课程和 TableView 截图。

public class Payment {

private Beneficiary beneficiary;
private String amount;
private String reference;

public void setBeneficiary(Beneficiary bene) {
    beneficiary = bene;
}

public Beneficiary getBeneficiary() {
    return beneficiary;
}

public void setAmount(String amt) {
    amount = amt;
}

public String getAmount() {
    return amount;
}

public void setReference(String ref) {
    reference = ref;
}

public String getReference() {
    return reference;
}



@XStreamAlias("beneficiary")
public class Beneficiary {

@XStreamAlias("beneficiaryName")
private String beneficiaryName;
@XStreamAlias("beneficiaryAccountNumber")
private String beneficiaryAccountNumber;
@XStreamAlias("beneficiarySortCode")
private String beneficiarySortCode;

public String getBeneficiaryName() {
    return beneficiaryName;
}

public void setBeneficiaryName(String name) {
    beneficiaryName = name;
}

public String getBeneficiaryAccountNumber() {
    return beneficiaryAccountNumber;
}

public void setBeneficiaryAccountNumber(String accountNumber) {
    beneficiaryAccountNumber = accountNumber;
}

public String getBeneficiarySortCode() {
    return beneficiarySortCode;
}

public void setBeneficiarySortCode(String sortCode) {
    beneficiarySortCode = sortCode;
}



        <TableView fx:id="paymentTable" layoutX="17.0" layoutY="222.0" prefHeight="200.0" prefWidth="812.0">
          <columns>
            <TableColumn fx:id="beneficiaryNameColumn" editable="false" prefWidth="169.0" text="Beneficiary Name">
                <cellValueFactory><PropertyValueFactory property="beneficiaryName" /></cellValueFactory>
            </TableColumn>
            <TableColumn fx:id="beneficiaryAccountNumberColumn" prefWidth="177.0" text="Beneficiary Account Number">
                <cellValueFactory><PropertyValueFactory property="beneficiaryAccountNumber" /></cellValueFactory>
            </TableColumn>
            <TableColumn fx:id="beneficiarySortCodeColumn" prefWidth="130.0" text="Beneficiary Sort Code">
                <cellValueFactory><PropertyValueFactory property="beneficiarySortCode" /></cellValueFactory>
            </TableColumn>
            <TableColumn fx:id="amount" prefWidth="147.0" text="Amount">
                <cellValueFactory><PropertyValueFactory property="amount" /></cellValueFactory>
            </TableColumn>
            <TableColumn prefWidth="184.0" text="Payment Reference">
                <cellValueFactory><PropertyValueFactory property="reference" /></cellValueFactory>
            </TableColumn>
          </columns>
        </TableView>

每次我尝试向 tableView 加载付款时，只有金额和参考是可见的。我尝试使用 PropertyValueFactory 值的各种组合来引用我的受益对象，但没有运气。

enter image description here

【问题讨论】：

标签： javafx javafx-2 tableview fxml

【解决方案1】：

PropertyValueFactory 无法访问“属性的属性”。相反，您必须直接实现setCellValueFactory 所需的Callback。您不能仅在 FXML 中执行此操作，但您可以使用控制器类中的 lambda 表达式轻松提供此实现。

// controller class referenced by root element of FXML file:
public class MyController {

    public void initialize() {

        beneficiaryNameColumn.setCellValueFactory(cellData -> {
            Payment payment = cellData.getValue();
            Beneficiary beneficiary = payment.getBeneficiary();
            return new ReadOnlyStringWrapper(beneficiary.getBeneficiaryName());
        });

        // etc
    }

}

或者，更简洁：

beneficiary.setCellValueFactory(cellData ->
    new ReadOnlyStringWrapper(cellData.getValue().getBeneficiary().getBeneficiaryName()));

【讨论】：