Question

我在javafx中创建了一个Web视图，并在其中加载了一个网页。网页包含从服务器随机生成的图像。一旦页面加载我尝试运行JavaScript以获取图像的网址并尝试将其应用于图像查看器，但网址向服务器发出另一个请求另一个图像，它呈现不同的图像，但我想要相同的图像，这是先在webview上加载。我不希望我的网络浏览器应该请求另一个图像并进行渲染。

First.fxml

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

<?import javafx.scene.image.*?>
<?import javafx.scene.web.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>


<AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8" fx:controller="com.jb.FirstController">
   <children>
      <SplitPane dividerPositions="0.3732638888888889" layoutX="10.0" layoutY="3.0" prefHeight="372.0" prefWidth="578.0">
    <items>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <WebView fx:id="webview" layoutX="6.0" layoutY="10.0" prefHeight="346.0" prefWidth="200.0" />
               </children>
            </AnchorPane>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <ImageView fx:id="imageview" fitHeight="311.0" fitWidth="256.0" layoutX="23.0" layoutY="23.0" pickOnBounds="true" preserveRatio="true" />
               </children>
            </AnchorPane>
        </items>
      </SplitPane>
   </children>
</AnchorPane>

FirstController.java

package com.jb;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.image.ImageViewBuilder;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;

/**
 * FXML Controller class
 *
 * @author admin
 */
public class FirstController implements Initializable {

@FXML
WebView webview;

@FXML
ImageView imageview;

private WebEngine webengine;


@Override
public void initialize(URL url, ResourceBundle rb) {
    webengine = webview.getEngine();

    //once the page is loaded this event occures
    webengine.getLoadWorker().stateProperty().addListener((obs,oldValue,newValue) -> {

    //if page loaded successfully
        if(newValue==Worker.State.SUCCEEDED)
        {
            //executing script to get the image src from webview
            String img=(String)webengine.getDocument().getElementById("addimage").getAttribute("src");
            System.out.println("img:"+img);

            //img variable has the value 'http://localhost:8080/WebApplication10/getNewAddImage'
    //'getNewAddImage' is a servlet which accept get request
            //this servlet gives a random image from backend 

    //setting the url in image view
    imageview.setImage(new Image(img));
        }                         
    });


    //requesting to index.jsp to load in webview
    webengine.load("http://localhost:8080/WebApplication10/index.jsp");
}    

}

Test.java

package com.jb;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @author admin
 */
public class Test extends Application {

@Override
public void start(Stage stage) throws Exception {
    Parent root = FXMLLoader.load(getClass().getResource("First.fxml"));

    Scene scene = new Scene(root);

    stage.setScene(scene);
    stage.show();
}

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

}

我需要加载首先在webview中加载的相同图像我不会要求新图像

任何帮助将不胜感激

由于

将图像从webview（Web引擎）加载到javafx中的imageviewer

0 个答案: