您可以简单地在formErrors的控制器中进行初始化。还要在控制器中添加TableView2而不是fxml：

AllPosts

感谢Slaw，Fabian和James_D的建议，再花几个小时浏览互联网教程，现在我已经解决了这个问题。

1. 我不得不使用嵌套控制器。
2. 子fxml的名称应与主fxml中定义为fx：id的名称匹配。的 如果我们以与子fxml名称相同的格式指定子fxml的controller，则会自动注入该控制器，但在末尾添加Controller并使首字母小写。请参阅下面我更新的工作代码。

我的TestTableView.fxml是-

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.cell.PropertyValueFactory?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity"
    minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0"
    prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1"
    xmlns:fx="http://javafx.com/fxml/1"
    fx:id ="t_anch"
    fx:controller="test.TestTableViewController">

    <children>
        <TableView fx:id="t_posts" layoutX="14.0" layoutY="65.0"
            prefHeight="141.0" prefWidth="570.0">
            <columns>
                <TableColumn fx:id="c_post_id" prefWidth="78.0"
                    text="Post Id" />
                <TableColumn fx:id="c_post_title" prefWidth="135.0"
                    text="Post Title" />
                <TableColumn fx:id="c_post_desc" prefWidth="237.0"
                    text="Post Desc" />
                <TableColumn fx:id="c_post_creator" prefWidth="119.0"
                    text="Post Creator" />
            </columns>
        </TableView>
    </children>
</AnchorPane>

我的TestTableView2.fxml是-

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.layout.BorderPane?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity"
    minHeight="-Infinity" minWidth="-Infinity" prefHeight="515.0"
    prefWidth="714.0" xmlns="http://javafx.com/javafx/11.0.1"
    xmlns:fx="http://javafx.com/fxml/1"
    fx:controller="test.TestTableView2Controller">
    <center>
        <TabPane>
            <tabs>
                <Tab closable="false" text="All Posts">
                    <content>
                            <fx:include fx:id="testTableView"
                                source="TestTableView.fxml" />
                    </content>
                </Tab>
            </tabs>
        </TabPane>
    </center>
</BorderPane>

TestTableViewController

package test;

import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.Parent;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.AnchorPane;
import model.app.posts.TablePost;

public class TestTableViewController {

    @FXML private  TableView<TablePost> t_posts ;
    @FXML private  TableColumn<TablePost,String> c_post_id ;
    @FXML private  TableColumn<TablePost,String> c_post_title ;
    @FXML private  TableColumn<TablePost,String> c_post_desc ;
    @FXML private  TableColumn<TablePost,String> c_post_creator ;

    @FXML private TabPane TabPane;
    @FXML private Tab AllPosts;
    @FXML private AnchorPane t_anch;
    @FXML private TestTableViewController t_anchController;

    @FXML private Parent TAllPosts;

    @FXML
    public void initialize() {
        System.out.println("Starting Table Init");
        c_post_id.setCellValueFactory(new PropertyValueFactory<TablePost,String>("postId"));
        c_post_title.setCellValueFactory(new PropertyValueFactory<TablePost,String>("postTitle"));
        c_post_desc.setCellValueFactory(new PropertyValueFactory<TablePost,String>("postDesc"));
        c_post_creator.setCellValueFactory(new PropertyValueFactory<TablePost,String>("postCreator"));
        System.out.println("Finished Table Init");
   }

    public void setTableItems(ObservableList<TablePost> posts) {
        t_posts.setItems(posts);
    }

}

TestTableView2Controller

package test;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import model.app.posts.TablePost;

public class TestTableView2Controller {

    @FXML private TestTableViewController testTableViewController;

    @FXML private void initialize() {
        ObservableList<TablePost> posts = FXCollections.observableArrayList();
        TablePost p1 ;
        p1 = new TablePost("id5","title1","desc1","creator1","OPEN");
        posts.add(p1);
        p1 = new TablePost("id6","title2","desc2","creator2","CLOSED");
        posts.add(p1);
        testTableViewController.setTableItems(posts);

    }

}

最后是TableTest.java

package test;

import java.io.IOException;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class TableTest extends Application {

    public TableTest() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        try {
            // load the fxml file
            FXMLLoader tableloader = new FXMLLoader(getClass().getResource("TestTableView2.fxml"));
            Parent root = tableloader.load();

            //load the login scene
            Scene scene = new Scene(root,800,400);
            stage.setTitle("Test Table Screen");
            stage.setScene(scene);
            stage.show();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}