fix：优化模板获取以及html模板

src/main/java/com/dpkj/modules/autoReplyPrint/service/impl/TemplateService.java

@@ -271,6 +271,10 @@ public class TemplateService {
             sharedContext.setInteractive(false);
             sharedContext.setDPI(256f);
 
+            // 使用系统默认字体，假设系统默认字体支持UTF - 8
+            Font font = new Font(Font.DIALOG, Font.PLAIN, 20);
+            graphics.setFont(font);
+
             // 使用Dimension对象进行布局
             renderer.layout(graphics, dimension);
             renderer.render(graphics);

src/main/java/com/dpkj/modules/autoReplyPrint/service/impl/USBImagePrintServiceImpl.java

@@ -24,7 +24,11 @@ public class USBImagePrintServiceImpl extends BaseImagePrint implements ImagePri
     @Override
     public Pointer getHandle(String devName) {
         try {
-            return AutoReplyPrint.INSTANCE.CP_Port_OpenUsb(devName, 1);
+            Pointer pointer = AutoReplyPrint.INSTANCE.CP_Port_OpenUsb(devName, 1);
+            if ( pointer == null ){
+                throw new RRException();
+            }
+            return pointer;
         }catch (Exception e){
             e.printStackTrace();
             throw new RRException("获取USB句柄失败");