springboot的 mybatis基本运行配置

1 写数据模型
2 在启动类上标注解**@MapperScan**("com.keyou.dao")扫描dao包接口层
3在dao接口上配注解**@Repository**
3.1注解：在接口方法上写@select，@update
3.2xml：在yml文件中配置xml所在类路径，例如
mybatis:
   mapper-locations: /mapper/basicQuery/*Dao.xml
   type-aliases-package : com.keyou.domain.basicQuery
xml文件开头配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.keyou.dao.basicQuery.CertificationCenterDao" >
# **namespace**将xml文件与相对应dao接口映射
下面写sql语句 比如
 <select id = "listQueryDpcInfoDO"  resultMap ="getListDpcInfoDO" >
   select * from
        (
        SELECT A.*, ROWNUM RN
        FROM ( select *
        from DPCINFO
        <where>
            <if test="centerInputParam.province !=null">
                province = #{centerInputParam.province }
            </if>

            <if test="centerInputParam.city !=null">
                and  city = #{centerInputParam.city}
            </if>
            <if test="centerInputParam.area !=null">
                and county = #{centerInputParam.area}
            </if>
            <if test="centerInputParam.begindate !=null and centerInputParam.enddate !=null">
                and to_char(time,'yyyy-mm-dd') between #{centerInputParam.begindate} and #{centerInputParam.enddate}
            </if>
            <if test="centerInputParam.cardNoOrName !=null">
                and   addr = #{centerInputParam.cardNoOrName}
            </if>
        </where>) A
        <where>
            <if test="pageSize !=null and pageIndex !=null" >
                ROWNUM &lt;= #{pageSize}*#{pageIndex}
            </if>
        </where>
        )
        <where>
            <if test= "pageIndex >1">
                RN >=(#{pageIndex}-1)*#{pageSize}
            </if>
        </where>
</select>
#  “#”中的对象属性为数据模型的属性值
# id ：接口方法与sql语句映射
   <resultMap id="getListDpcInfoDO" type="com.keyou.domain.basicQuery.DpcInfoDO">
        <id property="dpcinfoguid" column="DPCINFOGUID"/>
        <result  property="dpcid" column="DPCID"/>
        <result  property="addr" column="ADDR"/>
        <result  property="time" column="TIME"/>
        <result  property="province" column="PROVINCE"/>
        <result  property="city" column="CITY"/>
        <result  property="county" column="COUNTY"/>
        <result  property="ip" column="IP"/>
    </resultMap>
    接口方法传入的参数加注解@param例如
    List<DpcInfoDO> listQueryDpcInfoDO(@Param("centerInputParam") CertificationCenterInputParamDTO centerInputParam ,@Param("pageSize")int pageSize ,@Param("pageIndex")int pageIndex);