1、选修课选择教室、教员等用下拉选择，

2、绑定教材落库

backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/dto/jys/ElectiveCourseSaveDTO.java

@@ -35,6 +35,9 @@ public class ElectiveCourseSaveDTO {
     /** 教室编号 */
     private String jsbh;
 
+    /** 教材名称（按名称匹配教材信息，写入课程教材关联） */
+    private String jcmc;
+
     /** 计划人数 */
     private Integer rs;
 

backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/KCJCMapper.java

@@ -0,0 +1,12 @@
+package com.roomroot.jwgl.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.roomroot.jwgl.entity.KCJC;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 课程教材 Mapper
+ */
+@Mapper
+public interface KCJCMapper extends BaseMapper<KCJC> {
+}

backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/service/impl/ElectiveCourseServiceImpl.java

@@ -10,9 +10,11 @@ import com.roomroot.common.utils.poi.ExcelUtil;
 import com.roomroot.jwgl.dto.jys.ElectiveCourseImportDTO;
 import com.roomroot.jwgl.dto.jys.ElectiveCourseQuery;
 import com.roomroot.jwgl.dto.jys.ElectiveCourseSaveDTO;
+import com.roomroot.jwgl.entity.JCXX;
 import com.roomroot.jwgl.entity.JSB;
 import com.roomroot.jwgl.entity.JYB;
 import com.roomroot.jwgl.entity.KB;
+import com.roomroot.jwgl.entity.KCJC;
 import com.roomroot.jwgl.entity.XYDB;
 import com.roomroot.jwgl.entity.XYDNDXQJBXXB;
 import com.roomroot.jwgl.entity.XYDQB;
@@ -23,7 +25,9 @@ import com.roomroot.jwgl.mapper.ClassSemesterMapper;
 import com.roomroot.jwgl.mapper.ElectiveCourseMapper;
 import com.roomroot.jwgl.mapper.JYBMapper;
 import com.roomroot.jwgl.mapper.KBMapper;
+import com.roomroot.jwgl.mapper.KCJCMapper;
 import com.roomroot.jwgl.mapper.StudentTeamTaskMapper;
+import com.roomroot.jwgl.mapper.TeachingMaterialMapper;
 import com.roomroot.jwgl.mapper.XYDBMapper;
 import com.roomroot.jwgl.mapper.XYDQBMapper;
 import com.roomroot.jwgl.mapper.ZYBMapper;
@@ -93,6 +97,10 @@ public class ElectiveCourseServiceImpl implements ElectiveCourseService {
     private ZYBMapper zybMapper;
     @Resource
     private ClassSemesterMapper classSemesterMapper;
+    @Resource
+    private KCJCMapper kcjcMapper;
+    @Resource
+    private TeachingMaterialMapper teachingMaterialMapper;
 
     @Resource
     private TeamCodeUtil teamCodeUtil;
@@ -115,6 +123,8 @@ public class ElectiveCourseServiceImpl implements ElectiveCourseService {
             throw new ServiceException("选修课信息不能为空", BAD_REQUEST);
         }
         KB course = requireCourse(dto.getKbh());
+        // 先校验教材存在性，避免先建班/学期后失败回滚留下副作用
+        linkCourseTextbook(course.getKbh(), dto.getJcmc());
         String xydbh = resolveTeamId(dto.getXydbh(), dto.getXxbmc(), dto.getNj(), true, dto.getRs());
         XYDRWB task = new XYDRWB();
         task.setBh(UuidUtil.getOriginalUUID());
@@ -259,6 +269,11 @@ public class ElectiveCourseServiceImpl implements ElectiveCourseService {
                 }
                 jsbh = room.getJsbh();
             }
+            try {
+                linkCourseTextbook(course.getKbh(), row.getJcmc());
+            } catch (ServiceException e) {
+                throw new ServiceException("第" + line + "行" + e.getMessage(), BAD_REQUEST);
+            }
             String xydbh = resolveTeamId(null, row.getXxbmc().trim(), row.getKxbcnj(), true, row.getJhrs());
             XYDRWB task = new XYDRWB();
             task.setBh(UuidUtil.getOriginalUUID());
@@ -656,6 +671,34 @@ public class ElectiveCourseServiceImpl implements ElectiveCourseService {
         return course;
     }
 
+    /**
+     * 按教材名称把教材挂到课程（课程教材表）。教材按「名称」精确匹配，
+     * 同一课程同一教材的关联已存在则跳过，不覆盖课程已有教材。
+     */
+    private void linkCourseTextbook(String kbh, String jcmc) {
+        if (StringUtils.isEmpty(jcmc) || StringUtils.isEmpty(kbh)) {
+            return;
+        }
+        JCXX material = teachingMaterialMapper.selectOne(new LambdaQueryWrapper<JCXX>()
+                .eq(JCXX::getMc, jcmc.trim())
+                .last("LIMIT 1"));
+        if (material == null) {
+            throw new ServiceException("教材不存在：" + jcmc, NOT_FOUND);
+        }
+        Long exists = kcjcMapper.selectCount(new LambdaQueryWrapper<KCJC>()
+                .eq(KCJC::getKbh, kbh)
+                .eq(KCJC::getJcbh, material.getBh()));
+        if (exists != null && exists > 0) {
+            return;
+        }
+        KCJC link = new KCJC();
+        link.setBh(UuidUtil.getOriginalUUID());
+        link.setKbh(kbh);
+        link.setJcbh(material.getBh());
+        link.setTy(0);
+        kcjcMapper.insert(link);
+    }
+
     private void updateTeamDates(String xydbh, LocalDateTime start, LocalDateTime end) {
         if (start == null && end == null) {
             return;