SpringBoot Mybatis问题收集

1.在SpringBoot中打印mybatis中执行的sql

其实在application.properties 文件下，添加一下配置即可：

logging.level.org.springframework=WARN
logging.level.org.spring.springboot.dao=DEBUG
logging.file=logs/spring-boot-logging.log

注意：其中logging.level.com.你的Mapper包=日志等级

logging.level.com.shitou.huishi.domain.dataaccess=debug

2.在mybatis中返回count这个方法的结果

 <select id="selectListByType" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate" resultType="java.lang.Integer">
    select count(1) as num from tb_business_market_affiliate
    where busi_id=#{busiId,jdbcType=INTEGER}
    and data_key=#{dataKey,jdbcType=INTEGER}
    and data_type=#{dataType,jdbcType=VARCHAR}
  </select>

将resultMap="java.lang.Integer" 改成 resultType="java.lang.Integer" 

3.在Mybatis中单个参数使用test判断

  <select id="selectByPcode" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from tb_area_divisions
    where
    <choose>
      <when test="_parameter > 0">
        pcode = #{pcode,jdbcType=INTEGER}
      </when>
      <otherwise>
        level=1
      </otherwise>
    </choose>

  </select>

注意语句中_parameter,使用pcode时会报错

程序异常,nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'pcode' in 'class java.lang.Integer'

但是单个参数和多参数的判断有个不同点，当我们的入参为entity实体，或者map的时候，使用if 参数判断没任何问题。

但是当我们的入参为java.lang.Integer 或者 java.lang.String的时候，这时候就需要注意一些事情了

首先入参是java.lang.Integer， 而不是map或者实体的入参方式，对于这类单个入参然后用if判断的，mybatis有自己的内置对象

4.MyBatis报错 Parameter '0' not found. Available parameters are [arg1, arg0, param1, param2]

这个问题跟mybatis的版本有关

比如在mybatis3.4.0时 (mybatis-spring-boot-starter 1.1.1)，#{0}，#{1}都是可以使用的

但是在mybatis3.4.6时（mybatis-spring-boot-starter 1.3.2），使用#{0}，#{1}就不可以，就会报上述错误

根据网上的描述，在mybatis3.4.4版本为边界，从MyBatis3.4.4版后不能直接使用 #{0} 要使用 #{arg0} ；

5.parametertype 多个参数

不写parameterType参数，但是不能改变参数顺序，也不能重复使用参数

public List<XXXBean> getXXXBeanList(String xxId, String xxCode);  

<select id="getXXXBeanList" resultType="XXBean">不需要写parameterType参数

　　select t.* from tableName where id = #{0} and name = #{1}  

</select>  

2.基于注解，这个比较推荐

public List<XXXBean> getXXXBeanList(@Param("id")String id, @Param("code")String code);  

<select id="getXXXBeanList" resultType="XXBean">

　　select t.* from tableName where id = #{id} and name = #{code}  

</select>  

https://blog.csdn.net/lixld/article/details/77980443

6.模糊查询使用

subject_name like '%${subjectName}%'

或者

subject_name like CONCAT('%',#{subjectName,jdbcType=VARCHAR},'%')

https://blog.csdn.net/u010398771/article/details/70768280

7.Mybatis语句中使用到大于小于

mybatis查询的时候，需要用到运算符 小于号：< 和  大于号： >，在mybatis配置文件里面，这种会被认为是标签，所以解析错误

解决方法：

<if test="null!=beginTime and ''!=beginTime">
    <![CDATA[
       and create_time>=#{beginTime,jdbcType=VARCHAR}
]]>
  </if>
  <if test="null!=endTime and ''!=endTime">
  <![CDATA[
       and create_time<=#{endTime,jdbcType=VARCHAR}
         ]]>
  </if>

用 <![CDATA[  ]]> 把sql语句包裹起来，注意不要 包裹<if这样的，必须只能包裹sql语句。

8.Mybatis中使用in进行条件查询

下面这种情况是将names作为map的其中一个参数进行传递的

List<String> userNameList=new ArrayList<String>();

Map<String,Object> map= ReflectUtil.beanToMap(request);
map.put("userNames",userNameList);

 <if test="null!=userNames and userNames.size>0 ">
    and create_name in
    <foreach collection="userNames" index="index" item="item" open="(" separator="," close=")">
           #{item}
    </foreach>
  </if>

必须对列表进行筛选，size必须大于0，不然直接就是create_name in，foreach条件查询为空,sql语句会报错！

也可以自己手动拼接，然后使用${userNames}

如果参数类型为list,则在使用的时候，collection属性必须指定为list

查询方法：

List<FolderImgInfo> selectListByImageIds(List<Integer> ids);

Mybatis部分为：

where 1=1
    <if test="null!=list and list.size>0 ">
      and id in
      <foreach collection="list" index="index" item="item" open="(" separator="," close=")">
        #{item}
      </foreach>
    </if>

9.使用Map进行参数传递：

code:

List<LoanOrder> getLoanOrderListForJDGL(Map<String,Object> map);

xml:

  <select id="getLoanOrderListForJDGL" parameterType="java.util.Map" resultMap="BaseResultMap">

    select * from (
    select loan_order_id,loan_type,
    case loan_type
    when  1 then (select subject_no from hs_archive_info where archive_id=main_subject_archive_id)
    when  2 then (select subject_no from hs_archive_info where archive_id=borrower_archive_id)
    end subject_no,
    case loan_type
    when 1  then main_subject
    when 2 then borrower_name
    end subject_name,
    org_source,
    create_time,create_user_id, create_user_dept,create_name
    from hs_loan_order
    where loan_status=1
    order by create_time desc
    ) tb
    <where>
      1=1
      <if test="null!=productId">
        and loan_type=#{productId,jdbcType=BIGINT}
      </if>
      <if test="null!=loanOrderId and ''!=loanOrderId">
        and loan_order_id=#{loanOrderId,jdbcType=VARCHAR}
      </if>
      <if test="null!=subjectName and ''!=subjectName">
        and subject_name=#{subjectName,jdbcType=VARCHAR}
      </if>
      <if test="null!=subjectNo and ''!=subjectNo">
        and  subject_no=#{subjectNo,jdbcType=VARCHAR}
      </if>
      <if test="null!=createUserId and createUserId>0">
        and create_user_id=#{createUserId,jdbcType=BIGINT}
      </if>
      <if test="null!=departName and ''!=departName">
        and create_user_dept=#{departName,jdbcType=VARCHAR}
      </if>
      <if test="null!=beginTime and ''!=beginTime">
        <![CDATA[
       and create_time>=#{beginTime,jdbcType=VARCHAR}
]]>
      </if>
      <if test="null!=endTime and ''!=endTime">
        <![CDATA[
       and create_time<=#{endTime,jdbcType=VARCHAR}
         ]]>
      </if>
      <if test="null!=userNames and userNames.size>0 ">
        and create_name in
        <foreach collection="userNames" index="index" item="item" open="(" separator="," close=")">
          #{item}
        </foreach>
      </if>

    </where>
  </select>

10.字符串数组入参，字符串数组出参：

 <select id="selectCountByOrderList" parameterType="java.util.List" resultType="java.lang.String">
    select order_id from hs_app_push
    <if test="null!=list and list.size>0 ">
      where order_id  in
      <foreach collection="list" index="index" item="item" open="(" separator="," close=")">
        #{item}
      </foreach>
    </if>
  </select>

方法：

List<String> selectCountByOrderList(List<String> list);

 11.批量插入

 <insert id="insertBatchRecord" parameterType="java.util.List">
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    <selectKey keyProperty="detailId" order="AFTER" resultType="java.lang.Long">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into hs_excel_account_detail (batch_id, account_id, transaction_date,
    transaction_time, borrow_amount, loan_amount,
    currency, balance, opposite_account,
    opposite_name, digest, remark1,
    remark2, create_time, create_name
    )
    values
    <foreach collection ="list" item="item" index= "index" separator =",">
      (#{item.batchId,jdbcType=BIGINT}, #{item.accountId,jdbcType=BIGINT}, #{item.transactionDate,jdbcType=VARCHAR},
      #{item.transactionTime,jdbcType=VARCHAR}, #{item.borrowAmount,jdbcType=DECIMAL}, #{item.loanAmount,jdbcType=DECIMAL},
      #{item.currency,jdbcType=VARCHAR}, #{item.balance,jdbcType=DECIMAL}, #{item.oppositeAccount,jdbcType=VARCHAR},
      #{item.oppositeName,jdbcType=VARCHAR}, #{item.digest,jdbcType=VARCHAR}, #{item.remark1,jdbcType=VARCHAR},
      #{item.remark2,jdbcType=VARCHAR}, #{item.createTime,jdbcType=TIMESTAMP}, #{item.createName,jdbcType=VARCHAR}
      )
    </foreach>
  </insert>

 方法：

    void insertBatchRecord(List<ExcelAccountDetail> list);

 

 

模板：

<?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.shitou.huishi.domain.dataaccess.BusinessMarketAffiliateMapper">
  <resultMap id="BaseResultMap" type="com.shitou.huishi.domain.entity.BusinessMarketAffiliate">
    <id column="id" jdbcType="INTEGER" property="id" />
    <result column="busi_id" jdbcType="INTEGER" property="busiId" />
    <result column="data_type" jdbcType="VARCHAR" property="dataType" />
    <result column="data_key" jdbcType="INTEGER" property="dataKey" />
    <result column="data_value" jdbcType="INTEGER" property="dataValue" />
    <result column="create_name" jdbcType="INTEGER" property="createName" />
    <result column="create_time" jdbcType="TIMESTAMP" property="createTime" />
    <result column="update_name" jdbcType="INTEGER" property="updateName" />
    <result column="update_time" jdbcType="TIMESTAMP" property="updateTime" />
  </resultMap>
  
  <sql id="Base_Column_List">
    id, busi_id, data_type, data_key, data_value, create_name, create_time, update_name, 
    update_time
  </sql>
  
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from tb_business_market_affiliate
    where id = #{id,jdbcType=INTEGER}
  </select>
  
  <select id="selectListByLifeLoan" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from tb_business_market_affiliate
    where data_type='life_of_loan' and busi_id=#{busiId,jdbcType=INTEGER}
  </select>

  <select id="selectListByType" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate" resultType="java.lang.Integer">

    select count(1) as num from tb_business_market_affiliate
    where busi_id=#{busiId,jdbcType=INTEGER}
    and data_key=#{dataKey,jdbcType=INTEGER}
    and data_type=#{dataType,jdbcType=VARCHAR}
  </select>

  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete
    from tb_business_market_affiliate
    where id = #{id,jdbcType=INTEGER}
  </delete>

  <insert id="insert" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate">
    <selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into tb_business_market_affiliate (busi_id, data_type, data_key, 
      data_value, create_name, create_time, 
      update_name, update_time)
    values (#{busiId,jdbcType=INTEGER}, #{dataType,jdbcType=VARCHAR}, #{dataKey,jdbcType=INTEGER}, 
      #{dataValue,jdbcType=INTEGER}, #{createName,jdbcType=INTEGER}, #{createTime,jdbcType=TIMESTAMP}, 
      #{updateName,jdbcType=INTEGER}, #{updateTime,jdbcType=TIMESTAMP})
  </insert>
  
  <insert id="insertSelective" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate">
    <selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
      SELECT LAST_INSERT_ID()
    </selectKey>
    insert into tb_business_market_affiliate
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="busiId != null">
        busi_id,
      </if>
      <if test="dataType != null">
        data_type,
      </if>
      <if test="dataKey != null">
        data_key,
      </if>
      <if test="dataValue != null">
        data_value,
      </if>
      <if test="createName != null">
        create_name,
      </if>
      <if test="createTime != null">
        create_time,
      </if>
      <if test="updateName != null">
        update_name,
      </if>
      <if test="updateTime != null">
        update_time,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="busiId != null">
        #{busiId,jdbcType=INTEGER},
      </if>
      <if test="dataType != null">
        #{dataType,jdbcType=VARCHAR},
      </if>
      <if test="dataKey != null">
        #{dataKey,jdbcType=INTEGER},
      </if>
      <if test="dataValue != null">
        #{dataValue,jdbcType=INTEGER},
      </if>
      <if test="createName != null">
        #{createName,jdbcType=INTEGER},
      </if>
      <if test="createTime != null">
        #{createTime,jdbcType=TIMESTAMP},
      </if>
      <if test="updateName != null">
        #{updateName,jdbcType=INTEGER},
      </if>
      <if test="updateTime != null">
        #{updateTime,jdbcType=TIMESTAMP},
      </if>
    </trim>
  </insert>
  
  <update id="updateByPrimaryKeySelective" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate">
    update tb_business_market_affiliate
    <set>
      <if test="busiId != null">
        busi_id = #{busiId,jdbcType=INTEGER},
      </if>
      <if test="dataType != null">
        data_type = #{dataType,jdbcType=VARCHAR},
      </if>
      <if test="dataKey != null">
        data_key = #{dataKey,jdbcType=INTEGER},
      </if>
      <if test="dataValue != null">
        data_value = #{dataValue,jdbcType=INTEGER},
      </if>
      <if test="createName != null">
        create_name = #{createName,jdbcType=INTEGER},
      </if>
      <if test="createTime != null">
        create_time = #{createTime,jdbcType=TIMESTAMP},
      </if>
      <if test="updateName != null">
        update_name = #{updateName,jdbcType=INTEGER},
      </if>
      <if test="updateTime != null">
        update_time = #{updateTime,jdbcType=TIMESTAMP},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  
  <update id="updateByPrimaryKey" parameterType="com.shitou.huishi.domain.entity.BusinessMarketAffiliate">
    update tb_business_market_affiliate
    set busi_id = #{busiId,jdbcType=INTEGER},
      data_type = #{dataType,jdbcType=VARCHAR},
      data_key = #{dataKey,jdbcType=INTEGER},
      data_value = #{dataValue,jdbcType=INTEGER},
      create_name = #{createName,jdbcType=INTEGER},
      create_time = #{createTime,jdbcType=TIMESTAMP},
      update_name = #{updateName,jdbcType=INTEGER},
      update_time = #{updateTime,jdbcType=TIMESTAMP}
    where id = #{id,jdbcType=INTEGER}
  </update>
</mapper>

https://blog.csdn.net/u010448530/article/details/52023256

https://www.2cto.com/database/201505/401604.html

https://blog.csdn.net/qq_35261296/article/details/73559247

https://blog.csdn.net/crystalssj/article/details/76549024

https://www.kunzhao.org/blog/2017/07/23/mybatis/