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10.3 MyBatis调用存储过程 10.3.4修改数据

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10.3 MyBatis调用存储过程 10.3.4修改数据

在之前创建的mybatis数据库中创建一个修改tb_user表数据的存储过程。SQL脚本如下所示:

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drop procedure if exists update_user_by_id;
delimiter $$
create procedure update_user_by_id (
    IN p_id int,
    IN p_name varchar(18),
    IN p_sex varchar(19),
    IN p_age int
)
begin
    update tb_user set name=p_name,sex=p_sex,age=p_age
    where id=p_id;
end
$$
delimiter ;

注意

注意存储过程的参数定义,如果参数类型是varchar则一定要指定长度:IN p_name varchar(18),,如果直接写IN p_name varchar,将会创建失败.
也就是说下面的的将SQL脚本创建失败:

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drop procedure if exists update_user_by_id;
delimiter $$
create procedure update_user_by_id (
    IN p_id int,
    IN p_name varchar,
    IN p_sex varchar(19),
    IN p_age int
)
begin
    update tb_user set name=p_name,sex=p_sex,age=p_age
    where id=p_id;
end
$$
delimiter ;

错误提示如下:

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1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '
    IN p_sex varchar(19),
    IN p_age int
)

xml映射

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<update
    id="updateUserById"
    parameterType="domain.User"
    statementType="CALLABLE"> { 
    call update_user_by_id(
        #{id,mode=IN},
        #{name,mode=IN},
        #{sex,mode=IN},
        #{age,mode=IN})
    }
</update>

mapper接口方法

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void updateUserById(User user);

测试类

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package test;
import org.apache.ibatis.session.SqlSession;
import domain.User;
import fractory.SqlSessionFratoryTools;
import mapper.UserMapper;
public class UpdateUserByIDTest {
    public static void main(String[] args)
    {
        SqlSession sqlSession = null;
        // 1.获取SqlSession实例
        sqlSession = SqlSessionFratoryTools.getSqlSession();
        try
        {
            // 2.获取Mapper接口的代理对象
            UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
            // 3.调用mapper接口方法进行操作
            // 先找到要更新的记录
            User user = userMapper.selectUserById(6);
            if (user != null)
            {
                System.out.println("要更新的用户:" + user);
                user.setName("小李子");
                user.setSex("女");
                user.setAge(18);
                // 更新用户的信息
                userMapper.updateUserById(user);
                user = userMapper.selectUserById(6);
                System.out.println("更新后用户的信息:"+user);
                // 5.提交事务
                sqlSession.commit();
            }
        } catch (Exception e)
        {
            // 6.出错回滚
            sqlSession.rollback();
            e.printStackTrace();
        } finally
        {
            // 7.关闭会话
            if (sqlSession != null)
            {
                sqlSession.close();
            }
        }
    }
}

运行结果

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DEBUG [main] ==>  Preparing: {call select_user_by_id(?)} 
DEBUG [main] ==> Parameters: 6(Integer)
DEBUG [main] <==      Total: 1
DEBUG [main] <==    Updates: 0
要更新的用户:User [id=6, name=小李, sex=男, age=23]
DEBUG [main] ==>  Preparing: { call update_user_by_id( ?, ?, ?, ?) } 
DEBUG [main] ==> Parameters: 6(Integer), 小李子(String), 女(String), 18(Integer)
DEBUG [main] <==    Updates: 1
DEBUG [main] ==>  Preparing: {call select_user_by_id(?)} 
DEBUG [main] ==> Parameters: 6(Integer)
DEBUG [main] <==      Total: 1
DEBUG [main] <==    Updates: 0
更新后用户的信息:User [id=6, name=小李子, sex=女, age=18]

原文链接: 10.3 MyBatis调用存储过程 10.3.4修改数据