diff --git a/src/main/java/com/teaching/backend/common/ErrorCode.java b/src/main/java/com/teaching/backend/common/ErrorCode.java
index 4b2a66e..95830fb 100644
--- a/src/main/java/com/teaching/backend/common/ErrorCode.java
+++ b/src/main/java/com/teaching/backend/common/ErrorCode.java
@@ -18,7 +18,7 @@ public enum ErrorCode {
     STUDENT_NOT_EXIT(40006, "缺少学生信息"),
     COURSES_NOT_EXIT(40007, "缺少课程信息"),
     CONTENT_NOT_EXIT(40008, "内容id不存在"),
-    KNOWS_EXIT(40009, "该项下面存在关联的知识点"),
+    KNOWS_EXIT(40009, "该项下面存在关联的知识点，请在删除关联的知识点后再来操作！"),
     INVALID_ROLE(400010, "角色不存在"),
 
     NOT_LOGIN_ERROR(40100, "未登录"),
diff --git a/src/main/java/com/teaching/backend/controller/courses/CoursesController.java b/src/main/java/com/teaching/backend/controller/courses/CoursesController.java
index 07fb7f2..8840c0c 100644
--- a/src/main/java/com/teaching/backend/controller/courses/CoursesController.java
+++ b/src/main/java/com/teaching/backend/controller/courses/CoursesController.java
@@ -3,19 +3,14 @@ package com.teaching.backend.controller.courses;
 
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.common.CommonResult;
-import com.teaching.backend.common.ErrorCode;
 import com.teaching.backend.common.ResultUtils;
-import com.teaching.backend.exception.BusinessException;
-
 import com.teaching.backend.filter.ValidateParams;
 import com.teaching.backend.model.dto.courses.CoursesDTO;
 import com.teaching.backend.model.dto.courses.PageDTO;
-
 import com.teaching.backend.model.entity.courses.Courses;
 import com.teaching.backend.model.entity.umsAdmin.UmsStudent;
 import com.teaching.backend.model.query.CourseQuery;
 import com.teaching.backend.model.vo.courses.CoursesVO;
-import com.teaching.backend.model.vo.umsAdmin.UmsStudentVO;
 import com.teaching.backend.service.courses.ICoursesService;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -24,7 +19,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.http.HttpServletResponse;
-import java.util.*;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
 
 /**
  * <p>
@@ -87,7 +84,6 @@ public class CoursesController {
     @ApiOperation("查询课程列表")
     @ValidateParams({"userId"})
     @GetMapping("/page")
-//    @PostMapping("/page")
     public BaseResponse<PageDTO<CoursesVO>> getCourses(CourseQuery courseQuery){
         PageDTO<CoursesVO> coursesList = coursesService.queryCourses(courseQuery);
         return ResultUtils.success(coursesList);
@@ -97,9 +93,6 @@ public class CoursesController {
     @ValidateParams({"id"})
     @GetMapping("/{id}")
     public BaseResponse<CoursesDTO> getByIdCourse(@PathVariable String id){
-        if(id==null){
-            throw new BusinessException(ErrorCode.PARAMS_ERROR,"课程id为空");
-        }
         Courses course = coursesService.getById(id);
         CoursesDTO coursesDTO = new CoursesDTO();
         BeanUtils.copyProperties(course,coursesDTO);
@@ -114,16 +107,12 @@ public class CoursesController {
         return ResultUtils.success("编辑成功");
     }
 
-    //TODO:删除功能暂未完善，数据缺失
-    // 暂时发现有个漏洞 就是目标关联的有知识点的时候还是可以直接删除
-    // （当有内容的时候本来就是得先删除内容--关联也有知识点   所以内容下面的不用校验   ）
     @ApiOperation("根据id删除课程")
     @ValidateParams({"id"})
     @DeleteMapping("/{id}")
     public BaseResponse deleteCourses(@PathVariable String id){
 
         coursesService.deleteBatchByIds(id);
-//        coursesService.removeBatchByIds(ids);
         return ResultUtils.success("删除成功");
     }
 
diff --git a/src/main/java/com/teaching/backend/controller/courses/ObjectiveContentsController.java b/src/main/java/com/teaching/backend/controller/courses/ObjectiveContentsController.java
index 17a9462..cbe1c5e 100644
--- a/src/main/java/com/teaching/backend/controller/courses/ObjectiveContentsController.java
+++ b/src/main/java/com/teaching/backend/controller/courses/ObjectiveContentsController.java
@@ -39,7 +39,6 @@ public class ObjectiveContentsController {
     @ValidateParams({"id"})
     @DeleteMapping("/{id}")
     public BaseResponse<String> deleteContent(@PathVariable String id){
-//        objectiveContentsService.removeById(id);
         String data = objectiveContentsService.deleteById(id);
         return ResultUtils.success(data);
     }
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/CourseObjectivesServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/CourseObjectivesServiceImpl.java
index f5682e6..435f710 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/CourseObjectivesServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/CourseObjectivesServiceImpl.java
@@ -25,6 +25,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import static com.teaching.backend.utils.CourseCode.TOTAL_OBJECTIVE_HAS_NO_CHILD;
+
 /**
  * <p>
  *  服务实现类
@@ -54,33 +56,33 @@ public class CourseObjectivesServiceImpl extends ServiceImpl<CourseObjectivesMap
         CourseObjectives courseObjectivesNew = new CourseObjectives();
         BeanUtil.copyProperties(courseObjectivesDTO,courseObjectivesNew);
         String pid = courseObjectivesDTO.getPid();
-//        if(pid.equals(null)){
-//            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR,"pid父节点不能为空");
-//        }
         Integer type = courseObjectivesDTO.getType();
-        //判断是否已经添加过该类型的目标
-        //每个类型的目标只能有一个
+        //判断是否已经添加过该类型的目标(每个类型的目标只能有一个)
         Long count = courseObjectivesMapper.selectCount(new LambdaQueryWrapper<CourseObjectives>()
                 .eq(CourseObjectives::getPid, pid)
                 .eq(CourseObjectives::getType, type));
+
         if (count==CourseCode.OBJECTIVE_EXIT.getValue()){
             throw new BusinessException(ErrorCode.CONTENT_EXISTS,"该类型的目标已存在，禁止重复添加！");
         }
-        if (type!=CourseCode.SI_ZHENG_TYPE.getValue()){
+
+        if (!type.equals(CourseCode.SI_ZHENG_TYPE.getValue())){
             Long sz = SZ_EXIT(courseObjectivesDTO);
             if (sz!=CourseCode.SI_ZHENG_EXIT.getValue()){
                 throw new BusinessException(ErrorCode.PARAMS_ILLEGAL,"请在添加完思政目标以后再添加此类型目标！");
             }
         }
-        courseObjectivesMapper.insert(courseObjectivesNew);
+        //插入新的课程目标
+        int insert = courseObjectivesMapper.insert(courseObjectivesNew);
+        //插入数据以后要把总体目标那边的haschild改成1
+        if (insert>0){
+            CourseObjectives courseObjectivesOld = courseObjectivesMapper.selectById(pid);
+            if (courseObjectivesOld.getHasChild() == TOTAL_OBJECTIVE_HAS_NO_CHILD.getValue()) {
+                courseObjectivesOld.setHasChild(1);
+                courseObjectivesMapper.updateById(courseObjectivesOld);
+            }
+        }
         return "添加成功";
-
-        //往表里面写分项目标
-//        courseObjectivesMapper.insert(courseObjectivesNew);
-//        //插入数据以后要把总体目标那边的haschild改成1
-//        CourseObjectives courseObjectivesOld = courseObjectivesMapper.selectById(pid);
-//        courseObjectivesOld.setHasChild(1);
-//        courseObjectivesMapper.updateById(courseObjectivesOld);
     }
 
     private Long SZ_EXIT(CourseObjectivesDTO courseObjectivesDTO) {
@@ -110,7 +112,7 @@ public class CourseObjectivesServiceImpl extends ServiceImpl<CourseObjectivesMap
         if (type == CourseCode.TOTAL_OBJECTIVE_TYPE.getValue()){
             throw new BusinessException(ErrorCode.OPERATION_ERROR,"课程总目标只需清除所列内容即可！");
         }
-        //TODO:等到删完内容后判断还是上来就判断？
+        //等到删完内容后判断还是上来就判断？
         Long count = objectiveContentKnowMapper.selectCount(new LambdaQueryWrapper<ObjectiveContentKnow>()
                 .eq(ObjectiveContentKnow::getObjectiveOrContent, id));
         if(count > CourseCode.KNOWS_EXIT.getValue()){
@@ -121,9 +123,9 @@ public class CourseObjectivesServiceImpl extends ServiceImpl<CourseObjectivesMap
             LambdaQueryWrapper<CourseObjectives> queryWrapper = new LambdaQueryWrapper<>();
             queryWrapper.eq(CourseObjectives::getPid, pid);
             Long countSZ = courseObjectivesMapper.selectCount(queryWrapper);
-            if (countSZ==CourseCode.SI_ZHENG_EXIT.getValue()){
+            if (countSZ.equals(CourseCode.SI_ZHENG_EXIT.getValue())){
                 Long countContentsSZ = getCount(id);
-                if (countContentsSZ<(CourseCode.CONTENT_EXIT.getValue()))
+                if (countContentsSZ == (CourseCode.CONTENT_EXIT.getValue()))
                 {
                     // 删除操作和更新父目标状态
                     deleteObjectiveAndUpdateParent(id, pid);
@@ -140,7 +142,7 @@ public class CourseObjectivesServiceImpl extends ServiceImpl<CourseObjectivesMap
         }
         else {
             Long countContentsF = getCount(id);
-            if (countContentsF<CourseCode.CONTENT_EXIT.getValue()){
+            if (countContentsF == CourseCode.CONTENT_EXIT.getValue()){
                 courseObjectivesMapper.deleteById(id);
                 return "删除成功";
             }
@@ -160,7 +162,7 @@ public class CourseObjectivesServiceImpl extends ServiceImpl<CourseObjectivesMap
     private void deleteObjectiveAndUpdateParent(String id, String pid) {
         courseObjectivesMapper.deleteById(id);
         CourseObjectives parentObjective = courseObjectivesMapper.selectById(pid);
-        parentObjective.setHasChild(0);
+        parentObjective.setHasChild(TOTAL_OBJECTIVE_HAS_NO_CHILD.getValue());
         courseObjectivesMapper.updateById(parentObjective);
     }
 
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
index eac87ef..3504a58 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
@@ -39,6 +39,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.ResourceUtils;
+import org.springframework.util.StringUtils;
 
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
@@ -99,63 +100,68 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     @Override
     @Transactional
     public String saveCourseWithObjective(CoursesDTO coursesDTO) {
-//        String teacher = coursesDTO.getTeacher();
-//        if (teacher == null || teacher.equals("")) {
-//            throw new BusinessException(ErrorCode.USERNAME_NOT_EXIT);
-//        }
+        // 初始化并生成新的课程ID
         Courses courses = new Courses();
         String courseId = UUID.randomUUID().toString().replace("-", "");
 
-        CourseObjectives courseObjectives = new CourseObjectives();
+        // 拷贝属性并设置创建时间和ID
         BeanUtils.copyProperties(coursesDTO, courses);
         courses.setCreateTime(LocalDateTime.now());
         courses.setId(courseId);
+
+        // 检查课程代码是否已存在
         String code = coursesDTO.getCode();
-        QueryWrapper<Courses> queryWrapper = new QueryWrapper<>();
-        queryWrapper.eq("code", code);
-        Long count = coursesMapper.selectCount(queryWrapper);
-        if (count == 0) {
-            int insert = coursesMapper.insert(courses);
-            if (insert > 0) {
-                Courses coursesNew = coursesMapper.selectById(courseId);
-                courseObjectives.setCourseId(courseId);
-                courseObjectives.setType(CourseCode.TOTAL_OBJECTIVE_TYPE.getValue());
-//                courseObjectives.setName(coursesNew.getName() + "课程总体目标");
-                int insertTotal = courseObjectivesMapper.insert(courseObjectives);
-                if (insertTotal>0){
-                    CourseObjectives courseTotalObjectives = courseObjectivesMapper.selectOne
-                            (new LambdaQueryWrapper<CourseObjectives>().eq(CourseObjectives::getCourseId, courseId));
-                    String courseTotalObjectivesId = courseTotalObjectives.getId();
-                    List<ObjectivesType> objectivesTypes = objectivesTypeMapper.selectList(new LambdaQueryWrapper<ObjectivesType>());
-                    ArrayList<CourseObjectives> courseObjectivesFList = new ArrayList<>();
-                    CourseObjectives courseObjectivesF = null;
-                    for (ObjectivesType objectivesType : objectivesTypes) {
-                        Integer typeId = objectivesType.getId();
-                        if (!typeId.equals(CourseCode.TOTAL_OBJECTIVE_TYPE.getValue())){
-//                            String typeName = objectivesType.getTypeName();
-                            courseObjectivesF = new CourseObjectives();
-                            courseObjectivesF.setType(typeId);
-//                        courseObjectivesF.setName(typeName);
-                            courseObjectivesF.setPid(courseTotalObjectivesId);
-                            courseObjectivesFList.add(courseObjectivesF);
-                        }
-                    }
-                    courseObjectivesMapper.insertBatch(courseObjectivesFList);
-                    courseTotalObjectives.setHasChild(1);
-                    courseObjectivesMapper.updateById(courseTotalObjectives);
-                }
-            }
-            return "添加成功";
-        } else {
+        Long count = query().eq("code", code).count();
+        if (count > 0) {
             throw new BusinessException(ErrorCode.OPERATION_ERROR, "这个课程已经存在了！请联系系统相关人员为您导入课程数据!");
         }
 
+        // 插入课程信息
+        int insert = coursesMapper.insert(courses);
+        if (insert <= 0) {
+            throw new BusinessException(ErrorCode.OPERATION_ERROR, "课程插入失败！");
+        }
+
+        // 插入课程目标信息
+        CourseObjectives courseObjectives = new CourseObjectives();
+        courseObjectives.setCourseId(courseId);
+        courseObjectives.setType(CourseCode.TOTAL_OBJECTIVE_TYPE.getValue());
+        int insertTotal = courseObjectivesMapper.insert(courseObjectives);
+        if (insertTotal <= 0) {
+            throw new BusinessException(ErrorCode.OPERATION_ERROR, "课程目标插入失败！");
+        }
+
+        // 获取插入后的课程目标信息
+        CourseObjectives courseTotalObjectives = courseObjectivesMapper.selectOne(
+                new LambdaQueryWrapper<CourseObjectives>().eq(CourseObjectives::getCourseId, courseId)
+        );
+        String courseTotalObjectivesId = courseTotalObjectives.getId();
+
+        // 获取所有目标类型并插入子目标
+        List<ObjectivesType> objectivesTypes = objectivesTypeMapper.selectList(new LambdaQueryWrapper<>());
+        ArrayList<CourseObjectives> courseObjectivesFList = new ArrayList<>();
+        for (ObjectivesType objectivesType : objectivesTypes) {
+            if (!objectivesType.getId().equals(CourseCode.TOTAL_OBJECTIVE_TYPE.getValue())) {
+                CourseObjectives courseObjectivesF = new CourseObjectives();
+                courseObjectivesF.setType(objectivesType.getId());
+                courseObjectivesF.setPid(courseTotalObjectivesId);
+                courseObjectivesFList.add(courseObjectivesF);
+            }
+        }
+
+        // 批量插入子目标并更新父目标的hasChild字段
+        if (!courseObjectivesFList.isEmpty()) {
+            courseObjectivesMapper.insertBatch(courseObjectivesFList);
+            courseTotalObjectives.setHasChild(1);
+            courseObjectivesMapper.updateById(courseTotalObjectives);
+        }
+
+        return "添加成功";
     }
 
+
     @Override
     public PageDTO<CoursesVO> queryCourses(CourseQuery courseQuery) {
-//        int roleId = Integer.parseInt(umsUserMapper.selectOne(new LambdaQueryWrapper<UmsUser>()
-//                .eq(UmsUser::getUsername, courseQuery.getUsername())).getRoleId());
         UmsUser umsUser = umsUserMapper.selectById(courseQuery.getUserId());
         if (umsUser == null){
             throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
@@ -187,9 +193,11 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
         Page<Courses> p = lambdaQuery()
                 .like(courseQuery.getName() != null, Courses::getName, courseQuery.getName())
                 .apply("FIND_IN_SET({0}, teacher)", courseQuery.getUserId())
-                .eq(courseQuery.getCategory() != null && !courseQuery.getCategory().isEmpty(), Courses::getCategory, courseQuery.getCategory())
+                .eq(StringUtils.hasText(courseQuery.getCategory()), Courses::getCategory, courseQuery.getCategory())
+//                .eq(courseQuery.getCategory() != null && !courseQuery.getCategory().isEmpty(), Courses::getCategory, courseQuery.getCategory())
                 .eq(courseQuery.getNature() != null && !courseQuery.getNature().isEmpty(), Courses::getNature, courseQuery.getNature())
                 .eq(courseQuery.getAssessmenttype() != null &&!courseQuery.getAssessmenttype().isEmpty(), Courses::getAssessmenttype, courseQuery.getAssessmenttype())
+                .select(Courses::getId,Courses::getTeacher,Courses::getImg,Courses::getName,Courses::getCredit,Courses::getClasshours)
                 .page(page);
         return PageDTO.of(p,CoursesVO.class);
     }
@@ -204,6 +212,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
         Page<Courses> p = lambdaQuery()
                 .like(courseQuery.getName() != null, Courses::getName, courseQuery.getName())
                 .in(Courses::getId, coursesList)
+                .select(Courses::getId,Courses::getTeacher,Courses::getImg,Courses::getName,Courses::getCredit,Courses::getClasshours)
                 .page(page);
         return PageDTO.of(p, CoursesVO.class);
     }
@@ -215,6 +224,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
                 .eq(courseQuery.getNature() != null && !courseQuery.getNature().isEmpty(), Courses::getNature, courseQuery.getNature())
                 .eq(courseQuery.getAssessmenttype() != null &&!courseQuery.getAssessmenttype().isEmpty(), Courses::getAssessmenttype, courseQuery.getAssessmenttype())
                 .apply(courseQuery.getTeacher() != null && !courseQuery.getTeacher().isEmpty(), "FIND_IN_SET({0}, teacher)", courseQuery.getTeacher())
+                .select(Courses::getId,Courses::getTeacher,Courses::getImg,Courses::getName,Courses::getCredit,Courses::getClasshours)
                 .page(page);
         return PageDTO.of(p, CoursesVO.class);
     }
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
index f62b99a..13720df 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
@@ -18,6 +18,7 @@ import com.teaching.backend.service.courses.IObjectiveContentKnowService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.CollectionUtils;
 
 import java.math.BigDecimal;
 import java.math.RoundingMode;
@@ -71,7 +72,6 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
             objectiveContentKnow.setKnow(knowId);
             objectiveContentKnowList.add(objectiveContentKnow);
         }
-
         try {
             objectiveContentKnowMapper.insertBatchSomeColumn(objectiveContentKnowList);
         } catch (Exception e) {
@@ -84,12 +84,7 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
 
     @Override
     public ObjectiveContentKnowVO getCountData(String objectiveOrContentId) {
-        // 检查objectiveOrContentId是否为空，如果为空则抛出异常
-        if (objectiveOrContentId == null) {
-            throw new BusinessException(ErrorCode.OBJECTIVE_OR_CONTENT_NOT_EXIT);
-        }
-
-        // 查询分项目标关联的知识点数据
+        // 查询分项目标或者是下面的内容关联的知识点数据(按设计要求，这个传的就是分项目标的id)
         List<ObjectiveContentKnow> objectiveContentKnows = objectiveContentKnowMapper.selectList(
                 new LambdaQueryWrapper<ObjectiveContentKnow>()
                         .eq(ObjectiveContentKnow::getObjectiveOrContent, objectiveOrContentId));
@@ -105,16 +100,16 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
         Integer classhours = coursesMapper.selectById(courseId).getClasshours();
 
         // 计算并设置比例（百分比）
-        BigDecimal percentage = calculatePercentage(objectiveContentKnowVO.getKnowsTime(), classhours);
-        objectiveContentKnowVO.setPersent(percentage + "%");
+//        BigDecimal percentage = calculatePercentage(objectiveContentKnowVO.getKnowsTime(), classhours);
+
+//        objectiveContentKnowVO.setPersent(percentage + "%");
 
         // 查找分项目标下的内容
-        List<ObjectiveContents> objectiveContents = objectiveContentsMapper.selectList(
-                new LambdaQueryWrapper<ObjectiveContents>()
+        List<ObjectiveContents> objectiveContents = objectiveContentsMapper.selectList(new LambdaQueryWrapper<ObjectiveContents>()
                         .eq(ObjectiveContents::getObjectiveId, objectiveOrContentId));
 
         // 如果存在分项目标内容，处理并计算每个内容的相关数据
-        if (objectiveContents != null && !objectiveContents.isEmpty()) {
+        if (!CollectionUtils.isEmpty(objectiveContents)) {
             List<ObjectiveContentKnowVO> contentKnowVOs = objectiveContents.stream()
                     .map(content -> createObjectiveContentKnowVO(content.getId(), objectiveContentKnowMapper.selectList(
                             new LambdaQueryWrapper<ObjectiveContentKnow>()
@@ -123,10 +118,10 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
                     .collect(Collectors.toList());
 
             // 计算每个内容的知识点总学时的比例（百分比）
-            contentKnowVOs.forEach(contentKnowVO -> {
-                BigDecimal contentPercentage = calculatePercentage(contentKnowVO.getKnowsTime(), classhours);
-                contentKnowVO.setPersent(contentPercentage + "%");
-            });
+//            contentKnowVOs.forEach(contentKnowVO -> {
+//                BigDecimal contentPercentage = calculatePercentage(contentKnowVO.getKnowsTime(), classhours);
+//                contentKnowVO.setPersent(contentPercentage + "%");
+//            });
 
             // 设置内容的知识点数据
             objectiveContentKnowVO.setContentKnowsData(contentKnowVOs);
@@ -168,6 +163,4 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
         // 计算knowsTime占classhours的比例，先除以classhours再乘以100，保留两位小数，并四舍五入
         return knowsTime.divide(classHoursBigDecimal, 4, RoundingMode.HALF_UP).multiply(new BigDecimal(100)).setScale(2, RoundingMode.HALF_UP);
     }
-
-
 }
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentsServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentsServiceImpl.java
index 5ff37c9..b44668e 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentsServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentsServiceImpl.java
@@ -41,6 +41,6 @@ public class ObjectiveContentsServiceImpl extends ServiceImpl<ObjectiveContentsM
             throw new BusinessException(ErrorCode.KNOWS_EXIT);
         }
         int delete = objectiveContentsMapper.deleteById(id);
-        return delete>0 ? "删除成功！" : "删除失败！";
+        return delete > 0 ? "删除成功！" : "删除失败！";
     }
 }
diff --git a/src/main/java/com/teaching/backend/utils/CourseCode.java b/src/main/java/com/teaching/backend/utils/CourseCode.java
index d736cd4..b7b2465 100644
--- a/src/main/java/com/teaching/backend/utils/CourseCode.java
+++ b/src/main/java/com/teaching/backend/utils/CourseCode.java
@@ -4,14 +4,14 @@ public enum CourseCode {
     HAS_CHILD(1, "存在子节点"),
 
     OBJECTIVE_EXIT(1,"目标存在"),
-    CONTENT_EXIT(1, "存在内容"),
+    CONTENT_EXIT(0, "不存在内容"),
     SI_ZHENG_TYPE(1, "思政目标类型"),
     SI_ZHENG_EXIT(1, "思政目标存在"),
     KNOWS_EXIT(0, "存在关联的知识点"),
     TEACHER_ROLE_ID(1, "教师的角色id是1"),
     TOTAL_OBJECTIVE_TYPE(0, "课程总目标"),
 
-
+    TOTAL_OBJECTIVE_HAS_NO_CHILD(0, "课程总目标下面没有分项目标"),
     Total_EXIT(0, "课程总目标"),
     COURSE_UPDATING(1, "课程正在修改中");