update ruoyi-system/src/main/resources/mapper/system/SysOperLogMapper.xml.

问题：查业务类型为其他（businessType = 0）的数据时，会查到所有数据

原因：当参数为 Integer 类型 0 时，MyBatis 会把 0 当做空字符串处理

@@ -39,7 +39,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 			<if test="title != null and title != ''">
 				AND title like concat('%', #{title}, '%')
 			</if>
-			<if test="businessType != null and businessType != ''">
+			<if test="businessType != null">
 				AND business_type = #{businessType}
 			</if>
 			<if test="businessTypes != null and businessTypes.length > 0">