JavaFX实现图片显示，文本输入，表格显示

测试开发了一个javaFx写的支持文本输入，pdf文件转成图片显示，可以进行图标显示的demo，其中用Eclipse实现，代码结构如下图所示：

Main.java代码如下所示：

package application;

import javafx.application.Application;import javafx.event.ActionEvent;import javafx.event.EventHandler;import javafx.fxml.FXML;import javafx.fxml.FXMLLoader;import javafx.scene.Parent;import javafx.scene.Scene;import javafx.scene.control.Button;import
javafx.scene.control.TextField;import javafx.scene.layout.StackPane;import javafx.scene.paint.Color;import javafx.stage.Stage;public class Main extends Application {@Overridepublic void start(Stage primaryStage) {try {Parent root = FXMLLoader.load(getClass().getResource("/application/MyScence.fxml"));primaryStage.setTitle("我的第一个fx应用");primaryStage.setScene(new
Scene(root));primaryStage.show();} catch(Exception e) {e.printStackTrace();}}// @Override// public void start(Stage primaryStage) {// Button btn = new Button();// btn.setText("Say 'Hello World'");// btn.setOnAction(new EventHandler<ActionEvent>() {// @Override//
public void handle(ActionEvent event) {// System.out.println("Hello World!");// }// }); StackPane root = new StackPane();// root.getChildren().add(btn);// Scene scene = new Scene(root, 300, 250,Color.BLACK);// //  primaryStage.setTitle("Hello World!");//
//primaryStage.setFullScreen(true);// primaryStage.setScene(scene);// primaryStage.show();// }public static void main(String[] args) {launch(args);}}

布局文件如下所示：

<?xml version="1.0" encoding="UTF-8"?><?import javafx.geometry.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?><BorderPane fx:id="myBorderPane" focusTraversable="true" onKeyPressed="#keyInputAction" prefHeight="200.0" prefWidth="200.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MyController"><center><HBox prefHeight="100.0" prefWidth="200.0" BorderPane.alignment="CENTER"><children><ImageView fx:id="myImageView" fitHeight="100.0" fitWidth="200.0" onDragDetected="#OnDragDetected" onDragOver="#onDragOver" onMousePressed="#onMousePressed" onScroll="#onScoller" pickOnBounds="true" preserveRatio="true"><viewport><Rectangle2D /></viewport></ImageView></children></HBox></center><bottom><Button fx:id="myButton" mnemonicParsing="false" onAction="#showDataTime" onMouseClicked="#showDataTime" text="显示时间" BorderPane.alignment="CENTER" /></bottom><top><HBox alignment="TOP_CENTER" prefHeight="28.0" prefWidth="200.0" spacing="10.0" style="-fx-background-color: #336699;" BorderPane.alignment="CENTER"><children><TextField fx:id="myTextFile" focusTraversable="false"><padding><Insets bottom="10.0" left="10.0" right="10.0" top="10.0" /></padding></TextField></children><padding><Insets bottom="10.0" left="10.0" right="10.0" top="10.0" /></padding></HBox></top></BorderPane>

MyController.java如下：

package application;import java.awt.ItemSelectable;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.ResourceBundle;import javafx.beans.Observable;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.embed.swing.SwingFXUtils;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.image.ImageView;
import javafx.scene.image.WritableImage;
import javafx.scene.input.ClipboardContent;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.ScrollEvent;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.BorderPane;
import pdfboxTest.PdfBoxTest;public class MyController implements Initializable {@FXMLprivate Button myButton;@FXMLprivate TextField myTextFile;@FXMLprivate ImageView myImageView;@FXMLprivate BorderPane myBorderPane;    private Boolean isDragStart = false;private double startX;private double startY;private double traslateX;private double traslateY;@Overridepublic void initialize(URL location, ResourceBundle resources) {// TODO Auto-generated method stubmyTextFile.setVisible(true);myTextFile.addEventFilter(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {@Overridepublic void handle(KeyEvent event) {event.consume();KeyCode code = event.getCode();if (code == KeyCode.ENTER) {try {System.out.println(myTextFile.getText());//myImageView.setVisible(false);
//                     TextField tx = new TextField(myTextFile.getText());
//                     myBorderPane.setCenter(tx);//插入表格TableView<Task> tv = new TableView<Task>();ObservableList<Task> Task = FXCollections.observableArrayList();Task.add(new Task("雪龙号",1,"10-1完工"));Task.add(new Task("南极号", 2, "10-2完工"));   tv.setItems(Task);TableColumn<Task, String> shipCol = new TableColumn<Task, String>("ship");shipCol.setCellValueFactory(new PropertyValueFactory<>("ship"));TableColumn<Task,Integer>  numCol = new TableColumn<Task, Integer>("num"); numCol.setCellValueFactory(new PropertyValueFactory<>("num"));TableColumn<Task,String> planCol = new TableColumn<Task,String>("plan");planCol.setCellValueFactory(new PropertyValueFactory<>("plan"));tv.getColumns().setAll(shipCol,numCol,planCol);                      myBorderPane.setCenter(tv);myTextFile.clear();new Robot().keyPress(java.awt.event.KeyEvent.VK_RIGHT);//什么意思// XXX javafx has no robot for key type...} catch (Exception e1) {}event.consume();}}});}public void showDataTime()  {System.out.println("按钮被点击啦啊啊啊啊！");Date now = new Date();DateFormat df = new SimpleDateFormat("yyyy-dd-MM HH:mm:ss");String dateTimeString = df.format(now);BufferedImage image = null;try {image = PdfBoxTest.getImageFromPdf("H:/test.pdf");//ImageIO.write(image, "png", new File("D:/test.png"));System.out.println("image写入完毕");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}WritableImage wImage = new WritableImage(image.getWidth(),image.getHeight());System.out.println("image.getWidth()"+image.getWidth()+"  image.getHeight()"+image.getHeight());SwingFXUtils.toFXImage(image, wImage);//什么作用myTextFile.setText(dateTimeString);//设置文本框默认显示时间myImageView.setFitHeight(600);myImageView.setFitWidth(900);myImageView.setImage(wImage);}public void keyInputAction() {System.out.println("键盘事件被监听到了");myTextFile.requestFocus();String str = myTextFile.getText();CharSequence cs = myTextFile.getCharacters();//getCharacters是返回的什么？System.out.println("cs:" + cs);System.out.println(str);myTextFile.clear();}public void onScoller(ScrollEvent event) {System.out.println("滚轮事件触发");System.out.println(event.getDeltaX());System.out.println(event.getDeltaY());if (event.getDeltaY() > 0) {myImageView.setScaleX(myImageView.getScaleX() * 1.2);myImageView.setScaleY(myImageView.getScaleY() * 1.2);event.consume();// myImageView.resize(500, 500);System.out.println("image resized!");// ScaleTransition st =// ScaleTransitionBuilder.create().byX(1.5).byY(1.5).node(myImageView).duration(Duration.millis(500)).build();} else {myImageView.setScaleX(myImageView.getScaleX() * 0.8);myImageView.setScaleY(myImageView.getScaleY() * 0.8);}}public void onMousePressed(MouseEvent event) {System.out.println("onMousePressed:x=" + event.getX() + ";y=" + event.getY());startX = event.getSceneX();startY = event.getSceneY();traslateX = myImageView.getTranslateX();traslateY = myImageView.getTranslateY();}public void onMouseMoved(MouseEvent event) {System.out.println("onMouseMoved:x=" + event.getX() + ";y=" + event.getY());}@FXMLpublic void onMouseRelease(MouseEvent event) {System.out.println("onMouseRelease:x=" + event.getX() + ";y=" + event.getY());isDragStart = false;event.consume();}@FXMLpublic void OnDragDetected(MouseEvent event) throws InterruptedException {System.out.println("OnDragDetected" + event.getX() + ";y=" + event.getY());//填充内容，触发OnDragDetected事件Dragboard db = myImageView.startDragAndDrop(TransferMode.ANY);ClipboardContent content = new ClipboardContent();content.putString("hahahahh");db.setContent(content);
//      startX = event.getSceneX();
//      startY = event.getSceneY();event.consume();}public void onDragOver(DragEvent event) {System.out.println("onDragOver:" + (event.getSceneX()-startX) + ";y=" + (event.getSceneY()-startY));
//      traslateX = event.getSceneX()-startX;
//      traslateY = event.getSceneY()-startY;myImageView.setTranslateX(traslateX+event.getSceneX()-startX);myImageView.setTranslateY(traslateY+event.getSceneY()-startY);}}

Task类

package application;public class Task{private String ship;private Integer num;private String plan;Task(String ship,Integer num, String plan){this.ship= ship;this.num = num;this.plan = plan;}public String getShip() {return ship;}public void setShip(String ship) {this.ship = ship;}public Integer getNum() {return num;}public void setNum(Integer num) {this.num = num;}public String getPlan() {return plan;}public void setPlan(String plan) {this.plan = plan;}}

pdf转图片的实现：

package pdfboxTest;import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.encryption.InvalidPasswordException;
import org.apache.pdfbox.rendering.PDFRenderer;public class PdfBoxTest {public static void main(String[] args) throws InvalidPasswordException, IOException {PDDocument doc = PDDocument.load(new File("H:/test.pdf"));PDFRenderer renderer = new PDFRenderer(doc);int pageCount = doc.getNumberOfPages();System.out.println(pageCount);for(int i=0;i<pageCount;i++){BufferedImage image = renderer.renderImageWithDPI(i, 800);ImageIO.write(image, "PNG", new File("H:/"+i+".png"));}}public static BufferedImage getImageFromPdf(String pdfLocation) throws IOException{PDDocument doc = PDDocument.load(new File(pdfLocation));//加载pdf文件PDFRenderer renderer = new PDFRenderer(doc);//PDFRender类提供对pdf的一些操作类//int pageCount = doc.getNumberOfPages();BufferedImage image = renderer.renderImageWithDPI(0, 150);return image.getSubimage(0, 400, image.getWidth(), 900);}
}

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