mybatis存储过程及mode=IN,mode=OUT的使用

[mybatis]Mapper.mxl中mode=IN，mode=OUT使用场景
需配合 statementType=“CALLABLE” 使用

存储过程有三种类型的参数，分别为 IN（输入参数），OUT（输出参数），INOUT（输入输出参数）。一个存储过程，可以有多个 IN 参数，至多有一个 OUT 或 INOUT 参数

1. 只有 IN 参数的存储过程 不多说

2. 有 INOUT 或 OUT 参数的存储过程

addUser.sql

<select id="addUser" statementType="CALLABLE">
        call addDep(#{name,mode=IN,jdbcType=VARCHAR},#{parentId,mode=IN,jdbcType=INTEGER},#{enabled,mode=IN,jdbcType=BOOLEAN},#{result,mode=OUT,jdbcType=INTEGER},#{id,mode=OUT,jdbcType=INTEGER})
</select>

执行过程

/* Procedure structure for procedure `addDep` */

/*!50003 DROP PROCEDURE IF EXISTS  `addDep` */;

DELIMITER $$

/*!50003 CREATE DEFINER=`root`@`localhost` PROCEDURE `addDep`(in depName varchar(32),in parentId int,in enabled boolean,out result int,out result2 int)
begin
  declare did int;
  declare pDepPath varchar(64);
  insert into department set name=depName,parentId=parentId,enabled=enabled;
  select row_count() into result;
  select last_insert_id() into did;
  set result2=did;
  select depPath into pDepPath from department where id=parentId;
  update department set depPath=concat(pDepPath,'.',did) where id=did;
  update department set isParent=true where id=parentId;
end */$$
DELIMITER ;

    <select id="deleteUserById" statementType="CALLABLE">
        call deleteDep(#{id,mode=IN,jdbcType=INTEGER},#{result,mode=OUT,jdbcType=INTEGER})
    </select>

执行过程

/* Procedure structure for procedure `deleteDep` */

/*!50003 DROP PROCEDURE IF EXISTS  `deleteDep` */;

DELIMITER $$

/*!50003 CREATE DEFINER=`root`@`localhost` PROCEDURE `deleteDep`(in did int,out result int)
begin
  declare ecount int;
  declare pid int;
  declare pcount int;
  declare a int;
  select count(*) into a from department where id=did and isParent=false;
  if a=0 then set result=-2;
  else
  select count(*) into ecount from employee where departmentId=did;
  if ecount>0 then set result=-1;
  else 
  select parentId into pid from department where id=did;
  delete from department where id=did and isParent=false;
  select row_count() into result;
  select count(*) into pcount from department where parentId=pid;
  if pcount=0 then update department set isParent=false where id=pid;
  end if;
  end if;
  end if;
end */$$
DELIMITER ;

java部分

public interface UserMapper {
	void addUser(User user);
    void deleteUserById(User user);
}

@Autowired
UserMapper usemapper;
public addUser(User user) {
	usermapper.addUser(user);
}

@Autowired
UserService userService;

@PostMapping("/")
public RespBean addUser(@RequestBody User user) {
    userService.addUser(user);
    if (user.getResult() == 1) {
        return RespBean.ok("添加成功", user);
    }
    return RespBean.error("添加失败");
}