您必须为所有模型（工作流、工作表、任务）创建一个公共Model模型，因为它们都有一个字符串属性，所以创建一个非常简单。假设我们有以下模型：
public class Model {
private String name;
public Model(String name) {
this.name = name;
}
public String getName() {
return name;
}
@Override
public String toString() {
return getName();
}
}
class Workflow {
private String name;
private List<Sheet> sheets = new ArrayList<>();
public Workflow(String name) {
this.name = name;
}
public String getName() {
return name;
}
public List<Sheet> getSheets() {
return sheets;
}
}
class Sheet {
private String name;
private List<Task> tasks = new ArrayList<>();
public Sheet(String name) {
this.name = name;
}
public String getName() {
return name;
}
public List<Task> getTasks() {
return tasks;
}
}
class Task {
private String name;
public Task(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
我把你所有的模型放在一起，以便更好地看到它们。
我看到您没有.fxml在您的应用程序中使用任何文件，我的文件是.fxml我建议您至少分开以将Main类与Controller类分开，例如：
public class Main extends Application{
@Override
public void start(Stage primaryStage) throws Exception {
FXMLLoader loader = new FXMLLoader(getClass().getResource("View.fxml"));
AnchorPane pane = loader.load();
primaryStage.setScene(new Scene(pane,800,600));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
然后控制器类：
public class Controller implements Initializable {
@FXML
private TreeView<Model> treeView;
@Override
public void initialize(URL location, ResourceBundle resources) {
Workflow workflow = createWorkflow(); // This just sets up the models that you are using.
// You have to create a root in your case the "Workflow"
TreeItem<Model> root = new TreeItem<>(new Model(workflow.getName()));
// The foreach sheet you create a branch
workflow.getSheets().forEach(sheet -> {
TreeItem<Model> sheetBranch = new TreeItem<>(new Model(sheet.getName()));
// Then you have to add each branch to the root
root.getChildren().add(sheetBranch);
// Then foreach sheet you create a task item
sheet.getTasks().forEach(task -> {
TreeItem<Model> taskItem = new TreeItem<>(new Model(task.getName()));
// Then you have to add each task to its sheet parent
sheetBranch.getChildren().add(taskItem);
});
});
// Finally, you set the root for the TreeView. Of course this can be done right after instantiating the root.
treeView.setRoot(root);
}
// ------------------- Setup the model -----------------------
private Workflow createWorkflow() {
Workflow workflow = new Workflow("Workflow");
workflow.getSheets().addAll(createSheets());
return workflow;
}
private List<Sheet> createSheets() {
List<Sheet> sheets = new ArrayList<>();
IntStream.range(1, 10).forEach(value -> sheets.add(createSheet()));
return sheets;
}
private Sheet createSheet() {
Sheet sheet = new Sheet("Sheet" + new Random().nextInt(100)); // Random added to have different names
sheet.getTasks().addAll(createTasks());
return sheet;
}
private List<Task> createTasks() {
List<Task> tasks = new ArrayList<>();
IntStream.range(1, 5).forEach(value -> tasks.add(createTask()));
return tasks;
}
private Task createTask() {
return new Task("Task" + new Random().nextInt(100)); // Random added to have different names
}
}
以防万一您需要这里是.fxml文件：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.TreeView?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane xmlns="http://javafx.com/javafx"
xmlns:fx="http://javafx.com/fxml"
fx:controller="stackoverflow.tree.Controller">
<TreeView fx:id="treeView"/>
</AnchorPane>
如果您不知道深度，TreeView您可以使用递归创建所有分支或叶子。在这种情况下，使用两个 foreachs 而不是创建构建树结构的递归方法要简单得多。