diff --git a/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.java b/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.java
index 86980aa..1864360 100644
--- a/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.java
+++ b/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.java
@@ -8,4 +8,6 @@ public interface CourseMapper {
     Course getCourseById(Integer courseId);
     List<Course> getAllCourses();
     void addCourse(Course course);
+    void updateCourse(Course course);
+    void deleteCourseById(Integer courseId);
 }
diff --git a/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.xml b/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.xml
index 911742b..0710599 100644
--- a/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.xml
+++ b/grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.xml
@@ -30,4 +30,19 @@
         INSERT INTO course(coursename, credit, teacher)
         VALUES(#{courseName}, #{credit}, #{teacher})
     </insert>
+    
+    <!-- 修改课程信息 -->
+    <update id="updateCourse" parameterType="com.ssm.entity.Course">
+        UPDATE course
+        SET coursename = #{courseName},
+            credit = #{credit},
+            teacher = #{teacher}
+        WHERE courseId = #{courseId}
+    </update>
+    
+    <!-- 通过指定id删除课程信息 -->
+    <delete id="deleteCourseById" parameterType="int">
+        DELETE FROM course
+        WHERE courseId = #{courseId}
+    </delete>
 </mapper>
\ No newline at end of file
diff --git a/grademanagement-MyBatisProject/src/com/ssm/test/TestCourse.java b/grademanagement-MyBatisProject/src/com/ssm/test/TestCourse.java
index bfab4f3..8dd0a98 100644
--- a/grademanagement-MyBatisProject/src/com/ssm/test/TestCourse.java
+++ b/grademanagement-MyBatisProject/src/com/ssm/test/TestCourse.java
@@ -39,8 +39,43 @@ public class TestCourse {
                 System.out.println("未找到该课程");
             }
 
+            // 测试修改课程信息
+            System.out.println("\n=== 修改课程信息 ===");
+            addedCourse.setCourseName("一二二信息（已修改）");
+            addedCourse.setCredit(4);
+            addedCourse.setTeacher("李老师");
+            
+            courseMapper.updateCourse(addedCourse);
+            System.out.println("修改成功：" + addedCourse);
+
+            // 查询验证修改结果
+            System.out.println("\n=== 查询修改后的课程 ===");
+            Course updatedCourse = courseMapper.getCourseById(addedCourse.getCourseId());
+            if (updatedCourse != null) {
+                System.out.println("查询结果：" + updatedCourse);
+            } else {
+                System.out.println("未找到该课程");
+            }
+
+            // 测试通过指定id删除课程信息
+            System.out.println("\n=== 通过指定id删除课程信息 ===");
+            Integer deleteCourseId = addedCourse.getCourseId();
+            System.out.println("即将删除课程ID：" + deleteCourseId);
+            
+            courseMapper.deleteCourseById(deleteCourseId);
+            System.out.println("删除成功！");
+
+            // 查询验证删除结果
+            System.out.println("\n=== 查询删除后的课程（应该为空） ===");
+            Course deletedCourse = courseMapper.getCourseById(deleteCourseId);
+            if (deletedCourse == null) {
+                System.out.println("课程已成功删除，查询结果为空");
+            } else {
+                System.out.println("查询结果：" + deletedCourse);
+            }
+
             sqlSession.close();
-            System.out.println("\n✅ 课程添加测试完成！");
+            System.out.println("\n✅ 课程CRUD测试完成！");
 
         } catch (Exception e) {
             System.err.println("❌ 测试失败：");