diff --git a/src/main/java/xyz/playedu/api/controller/backend/CourseController.java b/src/main/java/xyz/playedu/api/controller/backend/CourseController.java
index 8579231..0e5a9d8 100644
--- a/src/main/java/xyz/playedu/api/controller/backend/CourseController.java
+++ b/src/main/java/xyz/playedu/api/controller/backend/CourseController.java
@@ -95,7 +95,7 @@ public class CourseController {
 
         Date now = new Date();
 
-        if (req.getHours() != null) {//无章节课时配置
+        if (req.getHours().size() > 0) {//无章节课时配置
             List<CourseHour> insertHours = new ArrayList<>();
             final Integer[] chapterSort = {0};
             for (CourseRequest.HourItem hourItem : req.getHours()) {
@@ -117,6 +117,7 @@ public class CourseController {
             if (req.getChapters() == null || req.getChapters().size() == 0) {
                 return JsonResponse.error("请配置课时");
             }
+
             List<CourseHour> insertHours = new ArrayList<>();
             final Integer[] chapterSort = {0};
 
diff --git a/src/main/java/xyz/playedu/api/domain/Course.java b/src/main/java/xyz/playedu/api/domain/Course.java
index 24f26cd..21c042a 100644
--- a/src/main/java/xyz/playedu/api/domain/Course.java
+++ b/src/main/java/xyz/playedu/api/domain/Course.java
@@ -8,6 +8,7 @@ import com.baomidou.mybatisplus.annotation.TableName;
 import java.io.Serializable;
 import java.util.Date;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.Data;
 
@@ -53,12 +54,10 @@ public class Course implements Serializable {
     @JsonProperty("created_at")
     private Date createdAt;
 
-    @JsonProperty("updated_at")
+    @JsonIgnore
     private Date updatedAt;
 
-    /**
-     * 删除时间
-     */
+    @JsonIgnore
     private Date deletedAt;
 
     @TableField(exist = false)
diff --git a/src/main/java/xyz/playedu/api/mapper/CourseMapper.java b/src/main/java/xyz/playedu/api/mapper/CourseMapper.java
index 6395dbc..0e48486 100644
--- a/src/main/java/xyz/playedu/api/mapper/CourseMapper.java
+++ b/src/main/java/xyz/playedu/api/mapper/CourseMapper.java
@@ -4,6 +4,7 @@ import org.apache.ibatis.annotations.Mapper;
 import xyz.playedu.api.domain.Course;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import xyz.playedu.api.types.mapper.CourseCategoryCountMapper;
+import xyz.playedu.api.types.paginate.CoursePaginateFiler;
 
 import java.util.List;
 
@@ -18,6 +19,10 @@ public interface CourseMapper extends BaseMapper<Course> {
 
     List<CourseCategoryCountMapper> getCategoryCount();
 
+    List<Course> paginate(CoursePaginateFiler filer);
+
+    Long paginateCount(CoursePaginateFiler filer);
+
 }
 
 
diff --git a/src/main/java/xyz/playedu/api/service/impl/CourseServiceImpl.java b/src/main/java/xyz/playedu/api/service/impl/CourseServiceImpl.java
index c4bc6c6..fdbd242 100644
--- a/src/main/java/xyz/playedu/api/service/impl/CourseServiceImpl.java
+++ b/src/main/java/xyz/playedu/api/service/impl/CourseServiceImpl.java
@@ -1,8 +1,5 @@
 package xyz.playedu.api.service.impl;
 
-import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
-import com.baomidou.mybatisplus.core.metadata.IPage;
-import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.transaction.annotation.Transactional;
@@ -18,7 +15,6 @@ import xyz.playedu.api.service.internal.ResourceCourseCategoryService;
 import xyz.playedu.api.types.mapper.CourseCategoryCountMapper;
 import xyz.playedu.api.types.paginate.CoursePaginateFiler;
 import xyz.playedu.api.types.paginate.PaginationResult;
-import xyz.playedu.api.util.HelperUtil;
 
 import java.util.*;
 import java.util.stream.Collectors;
@@ -39,51 +35,12 @@ public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> impleme
 
     @Override
     public PaginationResult<Course> paginate(int page, int size, CoursePaginateFiler filter) {
-        QueryWrapper<Course> wrapper = query().getWrapper().eq("1", "1");
-
-        if (filter.getTitle() != null && filter.getTitle().length() > 0) {
-            wrapper.like("title", "%" + filter.getTitle() + "%");
-        }
-        if (filter.getDepIds() != null && filter.getDepIds().trim().length() > 0) {
-            List<Integer> depIds = Arrays.stream(filter.getDepIds().split(",")).map(Integer::valueOf).toList();
-            List<Integer> courseIds = courseDepartmentService.getCourseIdsByDepIds(depIds);
-            if (courseIds == null || courseIds.size() == 0) {
-                courseIds = HelperUtil.zeroIntegerList();
-            }
-            wrapper.in("id", courseIds);
-        }
-        if (filter.getCategoryIds() != null && filter.getCategoryIds().trim().length() > 0) {
-            List<Integer> categoryIds = Arrays.stream(filter.getCategoryIds().split(",")).map(Integer::valueOf).toList();
-            List<Integer> courseIds = courseCategoryService.getCourseIdsByCategoryIds(categoryIds);
-            if (courseIds == null || courseIds.size() == 0) {
-                courseIds = HelperUtil.zeroIntegerList();
-            }
-            wrapper.in("id", courseIds);
-        }
-        if (filter.getIsShow() != null) {
-            wrapper.eq("is_show", filter.getIsShow());
-        }
-
-        String sortFiled = filter.getSortField();
-        if (sortFiled == null || sortFiled.trim().length() == 0) {
-            sortFiled = "id";
-        }
-        String sortAlgo = filter.getSortAlgo();
-        if (sortAlgo == null || sortAlgo.trim().length() == 0) {
-            sortAlgo = "desc";
-        }
-        if ("desc".equals(sortAlgo)) {
-            wrapper.orderByDesc(sortFiled);
-        } else {
-            wrapper.orderByAsc(sortFiled);
-        }
-
-        IPage<Course> pageObj = new Page<>(page, size);
-        pageObj = page(pageObj, wrapper);
+        filter.setPageStart((page - 1) * size);
+        filter.setPageSize(size);
 
         PaginationResult<Course> pageResult = new PaginationResult<>();
-        pageResult.setData(pageObj.getRecords());
-        pageResult.setTotal(pageObj.getTotal());
+        pageResult.setData(getBaseMapper().paginate(filter));
+        pageResult.setTotal(getBaseMapper().paginateCount(filter));
 
         return pageResult;
     }
diff --git a/src/main/java/xyz/playedu/api/types/paginate/CoursePaginateFiler.java b/src/main/java/xyz/playedu/api/types/paginate/CoursePaginateFiler.java
index 5c387a7..f78984f 100644
--- a/src/main/java/xyz/playedu/api/types/paginate/CoursePaginateFiler.java
+++ b/src/main/java/xyz/playedu/api/types/paginate/CoursePaginateFiler.java
@@ -21,4 +21,8 @@ public class CoursePaginateFiler {
 
     private Integer isShow;
 
+    private Integer pageStart;
+
+    private Integer pageSize;
+
 }
diff --git a/src/main/resources/mapper/CourseMapper.xml b/src/main/resources/mapper/CourseMapper.xml
index 87df17e..286c1ec 100644
--- a/src/main/resources/mapper/CourseMapper.xml
+++ b/src/main/resources/mapper/CourseMapper.xml
@@ -5,19 +5,20 @@
 <mapper namespace="xyz.playedu.api.mapper.CourseMapper">
 
     <resultMap id="BaseResultMap" type="xyz.playedu.api.domain.Course">
-            <id property="id" column="id" jdbcType="INTEGER"/>
-            <result property="title" column="title" jdbcType="VARCHAR"/>
-            <result property="thumb" column="thumb" jdbcType="VARCHAR"/>
-            <result property="charge" column="charge" jdbcType="INTEGER"/>
-            <result property="classHour" column="class_hour" jdbcType="INTEGER"/>
-            <result property="isShow" column="is_show" jdbcType="TINYINT"/>
-            <result property="createdAt" column="created_at" jdbcType="TIMESTAMP"/>
-            <result property="updatedAt" column="updated_at" jdbcType="TIMESTAMP"/>
-            <result property="deletedAt" column="deleted_at" jdbcType="TIMESTAMP"/>
+        <id property="id" column="id" jdbcType="INTEGER"/>
+        <result property="title" column="title" jdbcType="VARCHAR"/>
+        <result property="thumb" column="thumb" jdbcType="VARCHAR"/>
+        <result property="charge" column="charge" jdbcType="INTEGER"/>
+        <result property="classHour" column="class_hour" jdbcType="INTEGER"/>
+        <result property="isShow" column="is_show" jdbcType="TINYINT"/>
+        <result property="createdAt" column="created_at" jdbcType="TIMESTAMP"/>
+        <result property="updatedAt" column="updated_at" jdbcType="TIMESTAMP"/>
+        <result property="deletedAt" column="deleted_at" jdbcType="TIMESTAMP"/>
     </resultMap>
 
     <sql id="Base_Column_List">
-        id,title,thumb,
+        id
+        ,title,thumb,
         charge,class_hour,is_show,
         created_at,updated_at,deleted_at
     </sql>
@@ -27,4 +28,142 @@
         FROM `resource_course_category`
         GROUP BY `resource_course_category`.`category_id`;
     </select>
+
+    <select id="paginate" resultType="xyz.playedu.api.domain.Course">
+        SELECT `courses`.*
+        FROM `courses`
+        <if test="depIds != null and depIds != ''">
+            <choose>
+                <when test="depIds.indexOf('0')==0">
+                    LEFT JOIN `course_department` ON `course_department`.`course_id` = `courses`.`id`
+                </when>
+                <otherwise>
+                    INNER JOIN `course_department` ON `course_department`.`course_id` = `courses`.`id`
+                </otherwise>
+            </choose>
+        </if>
+        <if test="categoryIds != null and categoryIds != ''">
+            <choose>
+                <when test="categoryIds.indexOf('0')==0">
+                    LEFT JOIN `resource_course_category` ON `resource_course_category`.`course_id` = `courses`.`id`
+                </when>
+                <otherwise>
+                    INNER JOIN `resource_course_category` ON `resource_course_category`.`course_id` = `courses`.`id`
+                </otherwise>
+            </choose>
+        </if>
+
+        <where>
+            <if test="depIds != null and depIds != ''">
+                <choose>
+                    <when test="depIds.indexOf('0')==0">
+                        AND `course_department`.`course_id` IS NULL
+                    </when>
+                    <otherwise>
+                        AND `course_department`.`dep_id` IN (#{depIds})
+                    </otherwise>
+                </choose>
+            </if>
+            <if test="categoryIds != null and categoryIds != ''">
+                <choose>
+                    <when test="categoryIds.indexOf('0')==0">
+                        AND `resource_course_category`.`course_id` IS NULL
+                    </when>
+                    <otherwise>
+                        AND `resource_course_category`.`category_id` IN (#{categoryIds})
+                    </otherwise>
+                </choose>
+            </if>
+
+            <if test="title != null and title != ''">
+                AND `courses`.`title` LIKE concat('%',#{title},'%')
+            </if>
+        </where>
+
+        <if test="sortAlgo == 'asc'">
+            <choose>
+                <when test="sortField == 'charge'">
+                    ORDER BY `courses`.`charge` ASC
+                </when>
+                <when test="sortField == 'class_hour'">
+                    ORDER BY `courses`.`class_hour` ASC
+                </when>
+                <when test="sortField == 'created_at'">
+                    ORDER BY `courses`.`created_at` ASC
+                </when>
+                <otherwise>
+                    ORDER BY `courses`.`id` ASC
+                </otherwise>
+            </choose>
+        </if>
+        <if test="sortAlgo != 'asc'">
+            <choose>
+                <when test="sortField == 'charge'">
+                    ORDER BY `courses`.`charge` DESC
+                </when>
+                <when test="sortField == 'class_hour'">
+                    ORDER BY `courses`.`class_hour` DESC
+                </when>
+                <when test="sortField == 'created_at'">
+                    ORDER BY `courses`.`created_at` DESC
+                </when>
+                <otherwise>
+                    ORDER BY `courses`.`id` ASC
+                </otherwise>
+            </choose>
+        </if>
+        LIMIT #{pageStart}, #{pageSize};
+    </select>
+
+    <select id="paginateCount" resultType="java.lang.Long">
+        SELECT count(1)
+        FROM `courses`
+        <if test="depIds != null and depIds != ''">
+            <choose>
+                <when test="depIds.indexOf('0')==0">
+                    LEFT JOIN `course_department` ON `course_department`.`course_id` = `courses`.`id`
+                </when>
+                <otherwise>
+                    INNER JOIN `course_department` ON `course_department`.`course_id` = `courses`.`id`
+                </otherwise>
+            </choose>
+        </if>
+        <if test="categoryIds != null and categoryIds != ''">
+            <choose>
+                <when test="categoryIds.indexOf('0')==0">
+                    LEFT JOIN `resource_course_category` ON `resource_course_category`.`course_id` = `courses`.`id`
+                </when>
+                <otherwise>
+                    INNER JOIN `resource_course_category` ON `resource_course_category`.`course_id` = `courses`.`id`
+                </otherwise>
+            </choose>
+        </if>
+
+        <where>
+            <if test="depIds != null and depIds != ''">
+                <choose>
+                    <when test="depIds.indexOf('0')==0">
+                        AND `course_department`.`course_id` IS NULL
+                    </when>
+                    <otherwise>
+                        AND `course_department`.`dep_id` IN (#{depIds})
+                    </otherwise>
+                </choose>
+            </if>
+            <if test="categoryIds != null and categoryIds != ''">
+                <choose>
+                    <when test="categoryIds.indexOf('0')==0">
+                        AND `resource_course_category`.`course_id` IS NULL
+                    </when>
+                    <otherwise>
+                        AND `resource_course_category`.`category_id` IN (#{categoryIds})
+                    </otherwise>
+                </choose>
+            </if>
+
+            <if test="title != null and title != ''">
+                AND `courses`.`title` LIKE concat('%',#{title},'%')
+            </if>
+        </where>
+    </select>
 </mapper>