传递参数JavaFX-FXML
如何在javafx中将参数传递给辅助窗口?是否有与相应控制器通信的方法 例如: 用户从表视图中选择客户,并打开一个新窗口,显示客户信息传递参数JavaFX-FXML,javafx,parameters,dependency-injection,parameter-passing,fxml,Javafx,Parameters,Dependency Injection,Parameter Passing,Fxml,如何在javafx中将参数传递给辅助窗口?是否有与相应控制器通信的方法 例如: 用户从表视图中选择客户,并打开一个新窗口,显示客户信息 Stage newStage = new Stage(); try { AnchorPane page = (AnchorPane) FXMLLoader.load(HectorGestion.class.getResource(fxmlResource)); Scene scene = new Scene(page); newStag
Stage newStage = new Stage();
try
{
AnchorPane page = (AnchorPane) FXMLLoader.load(HectorGestion.class.getResource(fxmlResource));
Scene scene = new Scene(page);
newStage.setScene(scene);
newStage.setTitle(windowTitle);
newStage.setResizable(isResizable);
if(showRightAway)
{
newStage.show();
}
}
newStage将成为新的窗口。问题是,我无法通过将id作为参数传递给控制器来告诉控制器在哪里查找客户信息
有什么想法吗?javafx.scene.Node类有一对方法 setUserDataObject 和 对象getUserData 您可以使用它将信息添加到节点 因此,您可以调用page.setUserDatainfo 如果设置了信息,控制器可以进行检查。此外,如果需要,还可以使用ObjectProperty进行前向数据传输 请遵守此处的文档: 在第一个版本中的短语之前,handleButtonAction用@FXML标记,以允许控制器文档中定义的标记调用它。在第二个示例中,按钮字段被注释,以允许加载程序设置其值。initialize方法也有类似的注释 因此,您需要将控制器与节点关联,并将用户数据设置到节点。推荐方法 这个答案列举了将参数传递给FXML控制器的不同机制 对于小型应用程序,我强烈建议直接将参数从调用者传递到控制器——它简单、直接,并且不需要额外的框架 对于更大、更复杂的应用程序,如果您希望在应用程序中使用或使用机制,则值得研究 将参数直接从调用者传递到控制器
public class startController implements Initializable {
@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;
@FXML
private void toPageOne() throws IOException{
strSETonStartController = txtStartValue.getText().trim();
// yourString != null && yourString.trim().length() > 0
// int L = testText.length();
// if(L == 0){
// System.out.println("LENGTH IS "+L);
// return;
// }
/* if (testText.matches("[1-2]") && !testText.matches("^\\s*$"))
Second Match is regex for White Space NOT TESTED !
*/
String testText = txtStartValue.getText().trim();
// NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
// NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry
// =================================================================
if (testText.matches("[1-2]")) {
intSETonStartController = Integer.parseInt(strSETonStartController);
}else{
txtStartValue.setText("Enter 1 OR 2");
return;
}
System.out.println("You Entered = "+intSETonStartController);
stage = (Stage)startPane.getScene().getWindow();// pane you are ON
pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
Scene scene = new Scene(pageonePane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page One");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doGET(){
// Why this testing ?
// strSENTbackFROMPageoneController is null because it is set on Pageone
// =====================================================================
txtStartValue.setText(strSENTbackFROMPageoneController);
if(intSETonStartController == 1){
txtStartValue.setText(str);
}
System.out.println("== doGET WAS RUN ==");
if(txtStartValue.getText() == null){
txtStartValue.setText("");
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// This Method runs every time startController is LOADED
doGET();
}
}
public class PageoneController implements Initializable {
@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;
@FXML
private void onBTNONE() throws IOException{
stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page Two");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@FXML
private void onBTNTWO() throws IOException{
if(intSETonStartController == 2){
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Alert");
alert.setHeaderText("YES to change Text Sent Back");
alert.setResizable(false);
alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
+ "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
ButtonType buttonTypeYes = new ButtonType("YES");
ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == buttonTypeYes){
txtPageOneValue.setText("Alert YES Pressed");
} else {
System.out.println("canceled");
txtPageOneValue.setText("");
onBack();// Optional
}
}
}
@FXML
private void onBack() throws IOException{
strSENTbackFROMPageoneController = txtPageOneValue.getText();
System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
stage = (Stage)pageonePane.getScene().getWindow();
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));
Scene scene = new Scene(startPane);
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doTEST(){
String fromSTART = String.valueOf(intSETonStartController);
txtPageOneValue.setText("SENT "+fromSTART);
if(intSETonStartController == 1){
btnOne.setVisible(true);
btnTwo.setVisible(false);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}else{
btnOne.setVisible(false);
btnTwo.setVisible(true);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
doTEST();
}
}
public class PagetwoController implements Initializable {
@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;
@FXML
private void toStart() throws IOException{
str = "You ON Page Two";
stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
Scene scene = new Scene(startPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
通过从FXML加载程序实例检索控制器并调用控制器上的方法以使用所需的数据值对其进行初始化,将自定义数据传递给FXML控制器
类似于以下代码:
public Stage showCustomerDialog(Customer customer) {
FXMLLoader loader = new FXMLLoader(
getClass().getResource(
"customerDialog.fxml"
)
);
Stage stage = new Stage(StageStyle.DECORATED);
stage.setScene(
new Scene(loader.load())
);
CustomerDialogController controller = loader.getController();
controller.initData(customer);
stage.show();
return stage;
}
...
class CustomerDialogController {
@FXML private Label customerName;
void initialize() {}
void initData(Customer customer) {
customerName.setText(customer.getName());
}
}
如示例代码所示构造了一个新的FXMLLoader,即new FXMLLoaderlocation。该位置是一个URL,您可以通过以下方式从FXML资源生成该URL:
new FXMLLoader(getClass().getResource("sample.fxml"));
小心不要在FXMLLoader上使用静态加载函数,否则将无法从加载程序实例获取控制器
FXMLLoader实例本身对域对象一无所知。您不直接将特定于应用程序的域对象传递给FXMLLoader构造函数,而是:
基于指定位置的fxml标记构造FXMLLoader
从FXMLLoader实例获取控制器。
调用检索到的控制器上的方法,为控制器提供对域对象的引用。
这篇由另一位作者撰写的博客提供了一个类似的替代方案
在FXMLLoader上设置控制器
您可以在代码中构造一个新的控制器,将您想要的任何参数从调用者传递到控制器构造函数中。构造控制器后,可以在调用load instance方法之前在FXMLLoader实例上设置它
要在JavaFX2.x中的加载程序上设置控制器,还不能在fxml文件中定义fx:controller属性
由于FXML中对fx:controller定义的限制,我个人更喜欢从FXMLLoader获取控制器,而不是将控制器设置到FXMLLoader中
让控制器从外部静态方法检索参数
谢尔盖的回答就是这种方法的例证
使用依赖注入
FXMLLoader通过允许您在FXMLLoader上设置自定义控制器工厂来支持依赖项注入系统,如Guice、Spring或Java EE CDI。这提供了一个回调,您可以使用该回调创建控制器实例,该实例具有各自的依赖项注入系统注入的依赖值
以下问题的答案中提供了使用Spring的JavaFX应用程序和控制器依赖项注入的示例:
一个非常好的、干净的依赖项注入方法的例子是使用它的示例。afterburner.fx依赖JEE6执行依赖项注入
使用事件总线
最初的FXML规范创建者和实现者Greg Brown经常建议考虑使用事件总线(如Guava)在FXML实例化的控制器和其他应用程序逻辑之间进行通信
EventBus是一个简单但功能强大的发布/订阅API,带有注释,允许POJO在JVM中的任何位置相互通信,而无需相互引用
后续问答
关于第一种方法,你们为什么要回到舞台上?该方法也可能是无效的,因为您已经给出了show命令;就在返回阶段之前;。您如何通过返回舞台来计划使用
它是问题的功能解决方案。showCustomerDialog函数返回一个stage,以便外部类可以存储对它的引用
h可能希望稍后执行某些操作,例如根据主窗口中的按钮单击隐藏舞台。另一种面向对象的解决方案可以将功能和阶段引用封装在CustomerDialog对象中,或者具有CustomerDialog扩展阶段。一个面向对象接口到封装FXML、控制器和模型数据的自定义对话框的完整示例超出了本答案的范围,但对于任何想创建一个接口的人来说,这可能是一篇有价值的博客文章
名为的StackOverflow用户提供的其他信息
Spring启动依赖项注入示例
关于如何使用Spring引导的问题,我在附带的permalink中讨论了JavaFX2。
该方法仍然有效,并于2016年3月在Spring Boot v1.3.3版本上进行了测试:
有时,您可能希望将结果传递回调用方,在这种情况下,您可以查看相关问题的答案:
下面是一个使用Guice注入的控制器的示例
/**
* Loads a FXML file and injects its controller from the given Guice {@code Provider}
*/
public abstract class GuiceFxmlLoader {
public GuiceFxmlLoader(Stage stage, Provider<?> provider) {
mStage = Objects.requireNonNull(stage);
mProvider = Objects.requireNonNull(provider);
}
/**
* @return the FXML file name
*/
public abstract String getFileName();
/**
* Load FXML, set its controller with given {@code Provider}, and add it to {@code Stage}.
*/
public void loadView() {
try {
FXMLLoader loader = new FXMLLoader(getClass().getClassLoader().getResource(getFileName()));
loader.setControllerFactory(p -> mProvider.get());
Node view = loader.load();
setViewInStage(view);
}
catch (IOException ex) {
LOGGER.error("Failed to load FXML: " + getFileName(), ex);
}
}
private void setViewInStage(Node view) {
BorderPane pane = (BorderPane)mStage.getScene().getRoot();
pane.setCenter(view);
}
private static final Logger LOGGER = Logger.getLogger(GuiceFxmlLoader.class);
private final Stage mStage;
private final Provider<?> mProvider;
}
下面是加载程序的具体实现:
public class ConcreteViewLoader extends GuiceFxmlLoader {
@Inject
public ConcreteViewLoader(Stage stage, Provider<MyController> provider) {
super(stage, provider);
}
@Override
public String getFileName() {
return "my_view.fxml";
}
}
请注意,此示例将视图加载到舞台场景根的边界平面的中心。这与我的特定用例的示例实现细节无关,但决定保留它,因为有些人可能会发现它很有用。下面是一个通过名称空间向fxml文档传递参数的示例
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.VBox?>
<VBox xmlns="http://javafx.com/javafx/null" xmlns:fx="http://javafx.com/fxml/1">
<BorderPane>
<center>
<Label text="$labelText"/>
</center>
</BorderPane>
</VBox>
这很有效
请记住,第一次打印传递值时,将得到null,
您可以在加载windows后使用它,这同样适用于任何其他组件的所有代码
第一控制器
public class startController implements Initializable {
@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;
@FXML
private void toPageOne() throws IOException{
strSETonStartController = txtStartValue.getText().trim();
// yourString != null && yourString.trim().length() > 0
// int L = testText.length();
// if(L == 0){
// System.out.println("LENGTH IS "+L);
// return;
// }
/* if (testText.matches("[1-2]") && !testText.matches("^\\s*$"))
Second Match is regex for White Space NOT TESTED !
*/
String testText = txtStartValue.getText().trim();
// NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
// NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry
// =================================================================
if (testText.matches("[1-2]")) {
intSETonStartController = Integer.parseInt(strSETonStartController);
}else{
txtStartValue.setText("Enter 1 OR 2");
return;
}
System.out.println("You Entered = "+intSETonStartController);
stage = (Stage)startPane.getScene().getWindow();// pane you are ON
pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
Scene scene = new Scene(pageonePane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page One");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doGET(){
// Why this testing ?
// strSENTbackFROMPageoneController is null because it is set on Pageone
// =====================================================================
txtStartValue.setText(strSENTbackFROMPageoneController);
if(intSETonStartController == 1){
txtStartValue.setText(str);
}
System.out.println("== doGET WAS RUN ==");
if(txtStartValue.getText() == null){
txtStartValue.setText("");
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// This Method runs every time startController is LOADED
doGET();
}
}
public class PageoneController implements Initializable {
@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;
@FXML
private void onBTNONE() throws IOException{
stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page Two");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@FXML
private void onBTNTWO() throws IOException{
if(intSETonStartController == 2){
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Alert");
alert.setHeaderText("YES to change Text Sent Back");
alert.setResizable(false);
alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
+ "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
ButtonType buttonTypeYes = new ButtonType("YES");
ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == buttonTypeYes){
txtPageOneValue.setText("Alert YES Pressed");
} else {
System.out.println("canceled");
txtPageOneValue.setText("");
onBack();// Optional
}
}
}
@FXML
private void onBack() throws IOException{
strSENTbackFROMPageoneController = txtPageOneValue.getText();
System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
stage = (Stage)pageonePane.getScene().getWindow();
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));
Scene scene = new Scene(startPane);
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doTEST(){
String fromSTART = String.valueOf(intSETonStartController);
txtPageOneValue.setText("SENT "+fromSTART);
if(intSETonStartController == 1){
btnOne.setVisible(true);
btnTwo.setVisible(false);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}else{
btnOne.setVisible(false);
btnTwo.setVisible(true);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
doTEST();
}
}
public class PagetwoController implements Initializable {
@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;
@FXML
private void toStart() throws IOException{
str = "You ON Page Two";
stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
Scene scene = new Scene(startPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
试一试{
阶段st=新阶段;
FXMLLoader=new FXMLLoadergetClass.getResource/com/inty360/free/form/MainOnline.fxml;
父sceneMain=loader.load;
MainOnlineController=loader.getController;
controller.initVariable99L;
Scene Scene=新ScenesceneMain;
圣塞塞涅斯尼;
圣塞特梅德鲁;
圣塞提勒米应用程序;
圣秀;
}捕捉异常{
Logger.getLoggerLoginController.class.getName.logLevel.SEVERE,null,ex;
}
另一个控制器
public class startController implements Initializable {
@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;
@FXML
private void toPageOne() throws IOException{
strSETonStartController = txtStartValue.getText().trim();
// yourString != null && yourString.trim().length() > 0
// int L = testText.length();
// if(L == 0){
// System.out.println("LENGTH IS "+L);
// return;
// }
/* if (testText.matches("[1-2]") && !testText.matches("^\\s*$"))
Second Match is regex for White Space NOT TESTED !
*/
String testText = txtStartValue.getText().trim();
// NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
// NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry
// =================================================================
if (testText.matches("[1-2]")) {
intSETonStartController = Integer.parseInt(strSETonStartController);
}else{
txtStartValue.setText("Enter 1 OR 2");
return;
}
System.out.println("You Entered = "+intSETonStartController);
stage = (Stage)startPane.getScene().getWindow();// pane you are ON
pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
Scene scene = new Scene(pageonePane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page One");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doGET(){
// Why this testing ?
// strSENTbackFROMPageoneController is null because it is set on Pageone
// =====================================================================
txtStartValue.setText(strSENTbackFROMPageoneController);
if(intSETonStartController == 1){
txtStartValue.setText(str);
}
System.out.println("== doGET WAS RUN ==");
if(txtStartValue.getText() == null){
txtStartValue.setText("");
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// This Method runs every time startController is LOADED
doGET();
}
}
public class PageoneController implements Initializable {
@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;
@FXML
private void onBTNONE() throws IOException{
stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page Two");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@FXML
private void onBTNTWO() throws IOException{
if(intSETonStartController == 2){
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Alert");
alert.setHeaderText("YES to change Text Sent Back");
alert.setResizable(false);
alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
+ "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
ButtonType buttonTypeYes = new ButtonType("YES");
ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == buttonTypeYes){
txtPageOneValue.setText("Alert YES Pressed");
} else {
System.out.println("canceled");
txtPageOneValue.setText("");
onBack();// Optional
}
}
}
@FXML
private void onBack() throws IOException{
strSENTbackFROMPageoneController = txtPageOneValue.getText();
System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
stage = (Stage)pageonePane.getScene().getWindow();
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));
Scene scene = new Scene(startPane);
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doTEST(){
String fromSTART = String.valueOf(intSETonStartController);
txtPageOneValue.setText("SENT "+fromSTART);
if(intSETonStartController == 1){
btnOne.setVisible(true);
btnTwo.setVisible(false);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}else{
btnOne.setVisible(false);
btnTwo.setVisible(true);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
doTEST();
}
}
public class PagetwoController implements Initializable {
@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;
@FXML
private void toStart() throws IOException{
str = "You ON Page Two";
stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
Scene scene = new Scene(startPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
public void initVariableLong id_usuario{
this.id\u usuario=id\u usuario;
标签_usuario_nombre.setTextid_usuario.toString;
}
您必须创建一个上下文类
public class Context {
private final static Context instance = new Context();
public static Context getInstance() {
return instance;
}
private Connection con;
public void setConnection(Connection con)
{
this.con=con;
}
public Connection getConnection() {
return con;
}
private TabRoughController tabRough;
public void setTabRough(TabRoughController tabRough) {
this.tabRough=tabRough;
}
public TabRoughController getTabRough() {
return tabRough;
}
}
您只需在初始化时使用设置控制器的实例
Context.getInstance().setTabRough(this);
您可以在整个应用程序中使用它,只需使用
TabRoughController cont=Context.getInstance().getTabRough();
现在,您可以将参数从整个应用程序传递给任何控制器。您可以决定使用公共可观察列表来存储公共数据,或者只创建一个公共setter方法来存储数据并从相应的控制器检索数据 我意识到这是一个非常古老的帖子,已经有了一些很好的答案, 但是我想做一个简单的MCVE来演示一种这样的方法,并让新的程序员能够快速地看到这个概念的实际应用 在本例中,我们将使用5个文件: java-用于启动应用程序并调用第一个控制器。 Controller1.java—第一个FXML布局的控制器。 Controller2.java—第二个FXML布局的控制器。 Layout1.fxml-第一个场景的fxml布局。 Layout2.fxml-第二个场景的fxml布局。 所有文件都完整地列在这篇文章的底部 目标:演示如何将值从Controller1传递到Controller2,反之亦然 程序流程: 第一个场景包含一个文本字段、一个按钮和一个标签。单击按钮时,将加载并显示第二个窗口,包括在文本字段中输入的文本。 在第二个场景中,还有一个文本字段、一个按钮和一个标签。标签将显示在第一个场景的文本字段中输入的文本。 在第二个场景的文本字段中输入文本并单击其按钮后,第一个场景的标签将更新以显示输入的文本。 这是一个非常简单的演示,当然可以代表一些改进,但应该使概念非常清楚 代码本身也被注释了一些正在发生的事情以及如何发生的细节 代码 Main.java: Controller1.java: Controller2.java: Layout1.fxml: Layout2.fxml: 是的,你可以。 您需要添加第一个控制器: YourController=loader.getController; controller.setclientclient; 然后在第二个示例中声明一个客户端,然后在控制器的底部: 公共无效setclienClient c{ this.client=c; }
为什么要回答一个6岁的问题? 任何编程语言最基本的概念之一就是如何从一个窗口、窗体或页面导航到另一个窗口、窗体或页面。此外,在执行此导航时,开发人员通常希望从一个窗口、窗体或页面传递数据,并显示或使用传递的数据 虽然这里的大多数答案都提供了很好到很好的例子 如果是这样的话,我们想我们会把它提高一两个档次 我们之所以说三是因为我们将在三个窗口、窗体或页面之间导航,并使用静态变量的概念在窗口、窗体或页面之间传递数据 我们还将在导航时包含一些决策代码 公共类开始扩展应用程序{ @凌驾 public void startStage阶段引发异常{ //这是第一个运行的主类 父根=FXMLLoader.loadgetClass.getResourcestart.fxml; 场景=新场景; 第二阶段:第二阶段; stage.setResizeableFalse;//设置所有阶段的值 stage.setTitleStart页面; 舞台表演; 舞台场景; } 公共静态无效字符串[]args{ 发射艇; } } 启动控制器
public class startController implements Initializable {
@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;
@FXML
private void toPageOne() throws IOException{
strSETonStartController = txtStartValue.getText().trim();
// yourString != null && yourString.trim().length() > 0
// int L = testText.length();
// if(L == 0){
// System.out.println("LENGTH IS "+L);
// return;
// }
/* if (testText.matches("[1-2]") && !testText.matches("^\\s*$"))
Second Match is regex for White Space NOT TESTED !
*/
String testText = txtStartValue.getText().trim();
// NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
// NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry
// =================================================================
if (testText.matches("[1-2]")) {
intSETonStartController = Integer.parseInt(strSETonStartController);
}else{
txtStartValue.setText("Enter 1 OR 2");
return;
}
System.out.println("You Entered = "+intSETonStartController);
stage = (Stage)startPane.getScene().getWindow();// pane you are ON
pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
Scene scene = new Scene(pageonePane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page One");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doGET(){
// Why this testing ?
// strSENTbackFROMPageoneController is null because it is set on Pageone
// =====================================================================
txtStartValue.setText(strSENTbackFROMPageoneController);
if(intSETonStartController == 1){
txtStartValue.setText(str);
}
System.out.println("== doGET WAS RUN ==");
if(txtStartValue.getText() == null){
txtStartValue.setText("");
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// This Method runs every time startController is LOADED
doGET();
}
}
public class PageoneController implements Initializable {
@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;
@FXML
private void onBTNONE() throws IOException{
stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page Two");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@FXML
private void onBTNTWO() throws IOException{
if(intSETonStartController == 2){
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Alert");
alert.setHeaderText("YES to change Text Sent Back");
alert.setResizable(false);
alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
+ "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
ButtonType buttonTypeYes = new ButtonType("YES");
ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == buttonTypeYes){
txtPageOneValue.setText("Alert YES Pressed");
} else {
System.out.println("canceled");
txtPageOneValue.setText("");
onBack();// Optional
}
}
}
@FXML
private void onBack() throws IOException{
strSENTbackFROMPageoneController = txtPageOneValue.getText();
System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
stage = (Stage)pageonePane.getScene().getWindow();
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));
Scene scene = new Scene(startPane);
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doTEST(){
String fromSTART = String.valueOf(intSETonStartController);
txtPageOneValue.setText("SENT "+fromSTART);
if(intSETonStartController == 1){
btnOne.setVisible(true);
btnTwo.setVisible(false);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}else{
btnOne.setVisible(false);
btnTwo.setVisible(true);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
doTEST();
}
}
public class PagetwoController implements Initializable {
@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;
@FXML
private void toStart() throws IOException{
str = "You ON Page Two";
stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
Scene scene = new Scene(startPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
第一页控制器
public class startController implements Initializable {
@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;
@FXML
private void toPageOne() throws IOException{
strSETonStartController = txtStartValue.getText().trim();
// yourString != null && yourString.trim().length() > 0
// int L = testText.length();
// if(L == 0){
// System.out.println("LENGTH IS "+L);
// return;
// }
/* if (testText.matches("[1-2]") && !testText.matches("^\\s*$"))
Second Match is regex for White Space NOT TESTED !
*/
String testText = txtStartValue.getText().trim();
// NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
// NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry
// =================================================================
if (testText.matches("[1-2]")) {
intSETonStartController = Integer.parseInt(strSETonStartController);
}else{
txtStartValue.setText("Enter 1 OR 2");
return;
}
System.out.println("You Entered = "+intSETonStartController);
stage = (Stage)startPane.getScene().getWindow();// pane you are ON
pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
Scene scene = new Scene(pageonePane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page One");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doGET(){
// Why this testing ?
// strSENTbackFROMPageoneController is null because it is set on Pageone
// =====================================================================
txtStartValue.setText(strSENTbackFROMPageoneController);
if(intSETonStartController == 1){
txtStartValue.setText(str);
}
System.out.println("== doGET WAS RUN ==");
if(txtStartValue.getText() == null){
txtStartValue.setText("");
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// This Method runs every time startController is LOADED
doGET();
}
}
public class PageoneController implements Initializable {
@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;
@FXML
private void onBTNONE() throws IOException{
stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Page Two");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@FXML
private void onBTNTWO() throws IOException{
if(intSETonStartController == 2){
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Alert");
alert.setHeaderText("YES to change Text Sent Back");
alert.setResizable(false);
alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
+ "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
ButtonType buttonTypeYes = new ButtonType("YES");
ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == buttonTypeYes){
txtPageOneValue.setText("Alert YES Pressed");
} else {
System.out.println("canceled");
txtPageOneValue.setText("");
onBack();// Optional
}
}
}
@FXML
private void onBack() throws IOException{
strSENTbackFROMPageoneController = txtPageOneValue.getText();
System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
stage = (Stage)pageonePane.getScene().getWindow();
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));
Scene scene = new Scene(startPane);
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
private void doTEST(){
String fromSTART = String.valueOf(intSETonStartController);
txtPageOneValue.setText("SENT "+fromSTART);
if(intSETonStartController == 1){
btnOne.setVisible(true);
btnTwo.setVisible(false);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}else{
btnOne.setVisible(false);
btnTwo.setVisible(true);
System.out.println("INTEGER Value Entered = "+intSETonStartController);
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
doTEST();
}
}
public class PagetwoController implements Initializable {
@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;
@FXML
private void toStart() throws IOException{
str = "You ON Page Two";
stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
Scene scene = new Scene(startPane);// pane you are GOING TO
stage.setScene(scene);
stage.setTitle("Start Page");
stage.show();
stage.sizeToScene();
stage.centerOnScreen();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
下面是所有FXML文件
Stage.getScene->Scene.getRoot->Parent.getchildren递归搜索不可修改。这是非常肮脏的方式。如果有人能更好地建议smth,那就太好了。看来Stage.getScene.getRoot是正确的方法!ThanksFXMLLoader构造函数仅将URL作为参数。。实例化FXMLLoader的正确方法是什么?事件总线网站暗指状态,2013年3月更新:EventBus已经过时…DataFX控制器框架为FXML控制器提供了一些注入支持:添加了额外的问答部分来回答@AnarkieforGodshake的进一步问题在JavaFx中做这个小工作有什么简单的吗?在构造函数中传递数据是一个非常常见的功能,javafx需要将这些该死的东西放在一起才能发送一个名称或一个值?请检查这是否也有效:@Alvaro:您找到解决方案了吗?你能传递参数吗?从一个控制器到另一个控制器文件?是。朱厄西给出了书本级的解释。这就是为什么我接受了他的回答。应该注意的是,一些键是在内部使用的:例如fxmloader.CONTROLLER\u关键字、fxmloader.LOCATION\u键、fxmloader.RESOURCES\u键以及用作fx:id属性值的任何字符串。感谢这一点,我的另一个场景只是一个容器,它显示了之前在我的主场景中显示的文本。现在我可以有一个fxml,通过名称空间变量初始化内容,可以在多个地方重用它。我不必创建任何新方法或更改我的构造函数或初始化器-只需在我的FXML中添加变量,并在主控制器的fxmloader代码中添加一行即可。当您将参数从第一个控制器传递到第二个控制器时,这项工作正常,但如何将参数从第二个控制器传递到第一个控制器,我的意思是在加载first.fxml之后。@XlintXms请查看相关问题,它解决了您的其他问题。是否可以在fxml文件中设置控制器?因为删除行:loader.setControllerthis并在FXML文件中添加控制器会使应用程序崩溃,而不是从控制器本身加载FXML。例如,如果您从主类加载FXML,您可以在FXML文件中定义控制器,并使用loader.getControllerFinally获得对它的引用。我终于找到了一个解决方案,很好的例子。我在我的项目中实现了它,现在我正试图使两个窗口同时打开,并使第一个窗口成为模态。不幸的是,只有一个打开。有人能帮忙吗?我们使用这种方法,效果很好。我喜欢我可以访问构造函数或initialize方法中的数据,并且在构造之后我不必在控制器中设置数据。我很抱歉,但是发布100行代码而不解释它的功能或为什么要这样做,这不是一个很好的答案。另外,你发布的代码组织得很差,很难理解。没有必要对提问者粗鲁无礼。我们都在这里学习