添加打印工具类 2025年5月10日15:48:18

src/main/java/com/zhangmeng/online/exam/ui/utils/PrintUtils.java

@@ -0,0 +1,72 @@
+package com.zhangmeng.online.exam.ui.utils;
+
+import com.zhangmeng.online.exam.ui.admin.PaperPage;
+import com.zhangmeng.online.exam.ui.components.ExamComponent;
+import javafx.collections.ObservableSet;
+import javafx.print.*;
+import javafx.scene.control.ComboBox;
+import javafx.scene.transform.Scale;
+
+import java.util.List;
+
+public class PrintUtils {
+
+    public static void printPaper(ExamComponent examComponent){
+        printText(examComponent, Printer.getDefaultPrinter());
+    }
+
+    private void loadPrinters(ComboBox<Printer> comboBox) {
+        // 获取所有可用打印机
+        ObservableSet<Printer> printers = Printer.getAllPrinters();
+        if (printers.isEmpty()) {
+            System.out.println("未找到可用打印机");
+            return;
+        }
+
+        // 添加打印机到下拉框
+        comboBox.getItems().addAll(printers);
+
+        // 设置默认选择为系统默认打印机
+        Printer defaultPrinter = Printer.getDefaultPrinter();
+        if (defaultPrinter != null) {
+            comboBox.setValue(defaultPrinter);
+        }
+    }
+
+    private static void printText(ExamComponent examComponent, Printer selectedPrinter) {
+
+        if (selectedPrinter == null) {
+            System.out.println("未选择打印机");
+            return;
+        }
+
+        System.out.println("当前选择的打印机: " + selectedPrinter.getName());
+
+        // 创建打印作业
+        PrinterJob job = PrinterJob.createPrinterJob(selectedPrinter);
+        if (job.showPrintDialog(examComponent.getScene().getWindow())) {
+            // 获取打印设置
+            PageLayout pageLayout = selectedPrinter.createPageLayout(Paper.A4, PageOrientation.PORTRAIT, Printer.MarginType.DEFAULT);
+
+            // 计算缩放比例以适应页面
+            double scaleX = pageLayout.getPrintableWidth() / examComponent.getBoundsInParent().getWidth();
+            double scaleY = pageLayout.getPrintableHeight() / examComponent.getBoundsInParent().getHeight();
+            double scale = Math.min(scaleX, scaleY);
+
+            // 应用缩放
+            examComponent.getTransforms().add(new Scale(scale, scale));
+
+            // 执行打印
+            boolean printed = job.printPage(pageLayout, examComponent);
+            if (printed) {
+                job.endJob();
+                System.out.println("打印成功");
+            } else {
+                System.out.println("打印失败");
+            }
+
+            // 恢复缩放
+            examComponent.getTransforms().clear();
+        }
+    }
+}