fix 修复 代码生成模板小问题

ruoyi-modules/ruoyi-gen/src/main/resources/vm/java/serviceImpl.java.vm

@@ -75,7 +75,14 @@ public class ${ClassName}ServiceImpl implements I${ClassName}Service {
     }
 
     private LambdaQueryWrapper<${ClassName}> buildQueryWrapper(${ClassName}Bo bo) {
+#foreach ($column in $columns)
+#if($column.query && $column.queryType == 'BETWEEN')
+    #set($hasBetween = true)
+#end
+#end
+#if($hasBetween)
         Map<String, Object> params = bo.getParams();
+#end
         LambdaQueryWrapper<${ClassName}> lqw = Wrappers.lambdaQuery();
 #foreach($column in $columns)
 #if($column.query)