教室编号生成调整

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

@@ -2,6 +2,7 @@ package com.roomroot.jwgl.service.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.roomroot.common.utils.StringUtils;
 import com.roomroot.jwgl.entity.JSB;
 import com.roomroot.jwgl.mapper.ClassRoomMapper;
 import com.roomroot.jwgl.service.ClassRoomService;
@@ -26,9 +27,30 @@ public class ClassRoomServiceImpl implements ClassRoomService {
     public void add(JSB jsb) {
         jsb.setId(UuidUtil.getUUID());
         jsb.setDelFlag(0);
+        // 教室编号为非空列：留空时按现有最大数字编号 +1 自动生成
+        if (StringUtils.isEmpty(jsb.getJsbh())) {
+            jsb.setJsbh(nextJsbh());
+        } else {
+            jsb.setJsbh(jsb.getJsbh().trim());
+        }
         jsbMapper.insert(jsb);
     }
 
+    /**
+     * 获取下一个教室编号（纯数字编号中取最大值 +1）
+     */
+    private String nextJsbh() {
+        String maxJsbh = jsbMapper.selectMaxJsbh();
+        if (StringUtils.isEmpty(maxJsbh)) {
+            return "1";
+        }
+        try {
+            return String.valueOf(Integer.parseInt(maxJsbh.trim()) + 1);
+        } catch (NumberFormatException e) {
+            return "1";
+        }
+    }
+
     @Override
     public void delete(String id) {
         JSB jsb = getById(id);