为按钮指定事件处理程序时无法解析符号

我使用 javaFX。我正在尝试为按钮指定事件处理方法。发出错误 Cannot resolve symbol actionOk。老实说，我不明白这是怎么回事。fx:controller 已指定，方法已创建，fxml 文件在这些方法所在的位置看到 EditDialogController（Intellij Idea 看到按钮和字段，我可以双击它们）。在这个有问题的代码旁边是主控制器和主框架，它们是按照图像和相似性制作的，效果很好。告诉我我错过了什么。文件

<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" 
minWidth="-Infinity" prefHeight="150.0" prefWidth="400.0" 
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" 
fx:controller="sample.EditDialogController">
<left>
  <VBox prefHeight="200.0" prefWidth="100.0" BorderPane.alignment="CENTER">
     <children>
        <Label text="Full name">
           <VBox.margin>
              <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
           </VBox.margin>
        </Label>
        <Label text="Phone">
           <VBox.margin>
              <Insets bottom="5.0" left="5.0" right="5.0" top="17.0" />
           </VBox.margin>
        </Label>
     </children>
     <BorderPane.margin>
        <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
     </BorderPane.margin>
  </VBox>
</left>
<center>
  <VBox minWidth="200.0" prefHeight="200.0" prefWidth="100.0" 
BorderPane.alignment="CENTER">
     <children>
        <TextField fx:id="fieldFullName">
           <VBox.margin>
              <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
           </VBox.margin>
        </TextField>
        <TextField fx:id="fieldPhone">
           <VBox.margin>
              <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
           </VBox.margin>
        </TextField>
     </children>
     <BorderPane.margin>
        <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
     </BorderPane.margin>
  </VBox>
</center>
<right>
  <VBox prefHeight="200.0" prefWidth="100.0" BorderPane.alignment="CENTER">
     <children>
        <Button fx:id="buttonOkName" defaultButton="true" 
mnemonicParsing="false" onAction="#actionOk" prefHeight="25.0" 
prefWidth="51.0" text="OK">
           <VBox.margin>
              <Insets bottom="5.0" left="25.0" right="5.0" top="5.0" />
           </VBox.margin>
        </Button>
        <Button fx:id="buttonPhoneCalcel" cancelButton="true" 
mnemonicParsing="false"  text="Cancel">
           <VBox.margin>
              <Insets bottom="5.0" left="25.0" right="5.0" top="5.0" />
           </VBox.margin>
        </Button>
     </children>
     <BorderPane.margin>
        <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
     </BorderPane.margin>
  </VBox>
</right>
</BorderPane>

接下来分别是控制器文件：package sample；

import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

import java.awt.event.ActionEvent;

public class EditDialogController
{
@FXML
public Button buttonOkName;

@FXML
public Button buttonPhoneCalcel;

@FXML
public TextField fieldFullName;

@FXML
public TextField fieldPhone;

public Person person;

public void actionClose(ActionEvent actionEvent)
{

}

public void setPerson(Person person)
{
   this.person = person;

   fieldFullName.setText(person.getFullName());
   fieldPhone.setText(person.getPhone());

}


public void actionOk(ActionEvent actionEvent)
{

}
}