导出时可选择保存目录

src/main/java/org/example/ImageDotMarker.java

@@ -452,19 +452,43 @@ public class ImageDotMarker extends JFrame {
             return;
         }
 
-        StringBuilder sb = new StringBuilder();
-        sb.append("图片标记点坐标:\n");
-        for (int i = 0; i < points.size(); i++) {
-            MarkPoint p = points.get(i);
-            sb.append(String.format("%d. %s: (%d, %d)\n", i + 1, p.name, p.x, p.y));
+        JFileChooser fileChooser = new JFileChooser();
+        fileChooser.setSelectedFile(new File("mark_points.txt"));
+        fileChooser.setFileFilter(new FileNameExtensionFilter("文本文件 (*.txt)", "txt"));
+
+        int result = fileChooser.showSaveDialog(this);
+        if (result == JFileChooser.APPROVE_OPTION) {
+            try {
+                File file = fileChooser.getSelectedFile();
+                if (!file.getName().toLowerCase().endsWith(".txt")) {
+                    file = new File(file.getAbsolutePath() + ".txt");
+                }
+
+                StringBuilder sb = new StringBuilder();
+                // 添加头部信息
+                sb.append("# 图片标记点坐标导出\n");
+                if (currentImagePath != null) {
+                    sb.append(String.format("# 来源图片: %s\n", new File(currentImagePath).getName()));
+                }
+                sb.append(String.format("# 导出时间: %s\n", new java.util.Date()));
+                sb.append("# ======================================\n\n");
+                
+                // 添加标记点数据
+                sb.append("序号,名称,X坐标,Y坐标\n");
+                for (int i = 0; i < points.size(); i++) {
+                    MarkPoint p = points.get(i);
+                    sb.append(String.format("%d,%s,%d,%d\n", i + 1, p.name, p.x, p.y));
+                }
+
+                // 写入文件
+                java.nio.file.Files.write(file.toPath(), sb.toString().getBytes("UTF-8"));
+                
+                JOptionPane.showMessageDialog(this, "标记点坐标导出成功！\n保存位置: " + file.getAbsolutePath());
+                updateStatusBar("已导出标记点坐标到文件");
+            } catch (IOException ex) {
+                JOptionPane.showMessageDialog(this, "导出失败: " + ex.getMessage());
+            }
         }
-
-        JTextArea textArea = new JTextArea(sb.toString());
-        textArea.setEditable(false);
-        JScrollPane scrollPane = new JScrollPane(textArea);
-        scrollPane.setPreferredSize(new Dimension(300, 200));
-
-        JOptionPane.showMessageDialog(this, scrollPane, "标记点坐标", JOptionPane.INFORMATION_MESSAGE);
     }
 
     private void updatePointList() {