mybatis使用存储过程

Posted 2021-03-06 ritualyang

mybatis使用存储过程

• 创建存储过程

  CREATE DEFINER=`root`@`localhost` PROCEDURE `select_user_count`(out userCount INTEGER,OUT postCount INTEGER)
  BEGIN
    #Routine body goes here...
    SELECT count(*) as userCount from tb_sys_user into userCount;
    SELECT count(*) as postCount from tb_posts_post into postCount;
  END

• 创建对象

  public class CountVo implements Serializable {
      private static final long serialVersionUID = 1481563278090175522L;
      private Integer userCount;
      private Integer postCount;
      //toString,get,set........
  }

• 注解使用（不可设置数据为只读，不然out会报错的）

@Select({"call select_user_count(#{userCount,mode=OUT,jdbcType=INTEGER},#{postCount,mode=OUT,jdbcType=INTEGER})"})
    @Options(statementType = StatementType.CALLABLE)
    void getCount(CountVo countVo);

• xml调用

  <select id="getCount" parameterType="com.base.CountVo" statementType="CALLABLE">
        {call select_user_count(
        #{userCount,mode=OUT,jdbcType=INTEGER},
        #{postCount,mode=OUT,jdbcType=INTEGER})}
  </select>

• service层调用

  CountVo countVo = new CountVo();
  tbSysUserMapper.getCount(countVo);
  System.out.println(countVo.toString());