rev：logo图标更换 rev：木箱外表打印校验

lms/nladmin-system/src/main/java/org/nl/wms/pda/st/service/impl/PrintServiceImpl.java

@@ -116,6 +116,10 @@ public class PrintServiceImpl implements PrintService {
 
         // 生成txt文件
         JSONObject jsonPrint = printTab.query("print_id = '" + whereJson.getString("print_type") + "'").uniqueResult(0);
+        if (ObjectUtil.isEmpty(jsonPrint)) {
+            throw new BadRequestException("请选择打印机!");
+        }
+
         //10.1.3.21/LMSPrinter/
         String filePath = jsonPrint.getString("print_route") + "外包标签.txt";
         FileWriter fw = null;