完善SEQN 生成算法

src/main/java/com/gzzn/omms/msgexchangeapi/dao/CmoutmsgDao.java

@@ -1,5 +1,6 @@
 package com.gzzn.omms.msgexchangeapi.dao;
 
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 
 import com.gzzn.omms.msgexchangeapi.entity.Cmoutmsg;
@@ -7,5 +8,10 @@ import com.gzzn.omms.msgexchangeapi.entity.Cmoutmsg;
 
 public interface CmoutmsgDao  extends CrudRepository<Cmoutmsg, Long> {
 
-	
+	/**
+	 * 获取最大的id值
+	 * @return
+	 */
+	@Query("select max(coutmsgsId) from Cmoutmsg")
+	public Integer findMaxId();
 }