Mybatis增删改查之Oracle

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Mybatis增删改查之Oracle

写在前面的话

Mybatis的话一年没接触过了，这块有几个point需要注意：

  • 返回对象resultMap的映射，以及resultMap嵌套（嵌套查询）
  • jdbcType的参照，含义，用法
  • 新增返回主键
  • 批量新增，遇到指定字段重复则更新

没完成的是：批量新增返回主键List

一. 查询
  1. 普通查询(返回普通的持久层对象,由于数据库字段风格和java不同,所以建立一个map映射)
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<resultMap type="com.xxx.domain.RuleCondition" id="RuleConditionResultMapWithoutBondList">
    <id column="RC_ID" jdbcType="NUMERIC" property="ruleConditionId"/>
    <result column="RULE_CAT1" jdbcType="VARCHAR" property="ruleCatOne"/>
    <result column="RULE_CAT2" jdbcType="VARCHAR" property="ruleCatTwo"/>
    <result column="RC_OPER_TYPE" jdbcType="VARCHAR" property="ruleOperateSymbol"/>
    <result column="RULE_REF" jdbcType="VARCHAR" property="ruleRef"/>
    <result column="START_EFFECT_TIME" jdbcType="VARCHAR" property="effectTimeOfStart"/>
    <result column="END_EFFECT_TIME" jdbcType="VARCHAR" property="effectTimeOfEnd"/>
    <result column="BOND_CODE_1" jdbcType="VARCHAR" property="bondCodeOne"/>
    <result column="BOND_CODE_2" jdbcType="VARCHAR" property="bondCodeTwo"/>
    <result column="BP_THRESHOLD" jdbcType="NUMERIC" property="bpThreshold"/>
    <result column="RC_STATUS" jdbcType="VARCHAR" property="ruleStatus"/>
    <result column="OPERATOR_ID" jdbcType="VARCHAR" property="operatorId"/>
    <result column="LAST_UPDATED_DATE" jdbcType="DATE" property="lastUpdateTime"/>
  </resultMap> 

<select id="getRuleConditionWithoutBondListById" resultMap="RuleConditionResultMapWithoutBondList">
    select RC_ID,
           RULE_CAT1,
           RULE_CAT2,
           RC_OPER_TYPE,
           RULE_REF,
           START_EFFECT_TIME,
           END_EFFECT_TIME,
           BOND_CODE_1,
           BOND_CODE_2,
           BP_THRESHOLD,
           RC_STATUS,
           LAST_UPDATED_DATE
    FROM RULES_CONDITION
    WHERE RC_ID = #{ruleConditionId,jdbcType=NUMERIC}
  </select>
  1. 带有自定义对象的查询(带了一个List，嵌套查询)
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 <!--collection中的就是查询附带的list的函数
	property是java中list的属性名
-->
<resultMap type="com.xxx.domain.RuleCondition" id="RuleConditionResultMap">
    <id column="RC_ID" jdbcType="NUMERIC" property="ruleConditionId"/>
    <result column="RULE_CAT1" jdbcType="VARCHAR" property="ruleCatOne"/>
    <result column="RULE_CAT2" jdbcType="VARCHAR" property="ruleCatTwo"/>
    <result column="RC_OPER_TYPE" jdbcType="VARCHAR" property="ruleOperateSymbol"/>
    <result column="RULE_REF" jdbcType="VARCHAR" property="ruleRef"/>
    <result column="START_EFFECT_TIME" jdbcType="VARCHAR" property="effectTimeOfStart"/>
    <result column="END_EFFECT_TIME" jdbcType="VARCHAR" property="effectTimeOfEnd"/>
    <result column="BOND_CODE_1" jdbcType="VARCHAR" property="bondCodeOne"/>
    <result column="BOND_CODE_2" jdbcType="VARCHAR" property="bondCodeTwo"/>
    <result column="BP_THRESHOLD" jdbcType="NUMERIC" property="bpThreshold"/>
    <result column="RC_STATUS" jdbcType="VARCHAR" property="ruleStatus"/>
    <result column="OPERATOR_ID" jdbcType="VARCHAR" property="operatorId"/>
    <result column="LAST_UPDATED_DATE" jdbcType="DATE" property="lastUpdateTime"/>
    <collection column="RC_ID" property="bondList" ofType="com.xxx.domain.RuleBond"
                select="getBondListByRuleConditionId">
    </collection>
  </resultMap>

  <resultMap type="com.xxx.domain.RuleBond" id="RuleBondResultMap">
    <id column="RB_ID" jdbcType="NUMERIC" property="ruleBondId"/>
    <id column="RC_ID" jdbcType="NUMERIC" property="ruleConditionId"/>
    <result column="BOND_CODE" jdbcType="VARCHAR" property="bondCode"/>
    <result column="SECURITY_TERM" jdbcType="VARCHAR" property="term"/>
    <result column="BID_STRATEGY_ID" jdbcType="VARCHAR" property="bidStrategyId"/>
    <result column="OFR_STRATEGY_ID" jdbcType="VARCHAR" property="ofrStrategyId"/>
    <result column="STATUS" jdbcType="VARCHAR" property="status"/>
    <result column="OPERATOR_ID" jdbcType="VARCHAR" property="operatorId"/>
    <result column="LAST_UPDATED_DATE" jdbcType="DATE" property="lastUpdateTime"/>
  </resultMap>
<!--查询语句-->
  <select id="getRuleConditionBOsByEnumValue" resultMap="RuleConditionBOResultMap">
    select RC_ID,
           RULE_CAT1,
           RULE_CAT2,
           RC_OPER_TYPE,
           RULE_REF,
           START_EFFECT_TIME,
           END_EFFECT_TIME,
           BOND_CODE_1,
           BOND_CODE_2,
           BP_THRESHOLD,
           RC_STATUS,
           LAST_UPDATED_DATE
    FROM RULES_CONDITION
    WHERE RULE_CAT1 = #{enumValue,jdbcType=VARCHAR}
  </select>
<!--附带List的查询语句-->
  <select id="getBondListByRuleConditionId" resultMap="RuleBondResultMap">
    select RB_ID,
           RC_ID,
           t1.BOND_CODE,
           t2.SECURITY_TERM,
           BID_STRATEGY_ID,
           OFR_STRATEGY_ID,
           t1.STATUS,
           t1.LAST_UPDATED_DATE
    FROM RULES_BOND t1
           left join BOND_BASIS_INFO t2 on t1.BOND_CODE = t2.BOND_CODE
    WHERE RC_ID = #{ruleConditionId,jdbcType=NUMERIC}
  </select>
二. 新增
  1. 普通新增
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<insert id="addRuleBond" parameterType="com.xxx.domain.RuleBond">
  insert into RULES_BOND
  (RB_ID,
  RC_ID,
  BOND_CODE,
  BID_STRATEGY_ID,
  OFR_STRATEGY_ID,
  STATUS,
  OPERATOR_ID,
  LAST_UPDATED_DATE)
  values (SEQ_RULES_BOND.nextVal,
  #{ruleConditionId,jdbcType=NUMERIC},
  #{bondCode,jdbcType=VARCHAR},
  #{bidStrategyId,jdbcType=VARCHAR},
  #{ofrStrategyId,jdbcType=VARCHAR},
  #{status,jdbcType=VARCHAR},
  #{operatorId,jdbcType=VARCHAR},
  systimestamp)
</insert>
  1. 返回主键(多了一个selectkey)
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<!--selectkey中 keyproperty是写java中属性名称
 	后面的values中将得到的ruleBondId赋值即可-->
<insert id="addRuleBond" parameterType="com.xxx.domain.RuleBond">
 <selectKey resultType="java.lang.Integer" order="BEFORE" keyProperty="ruleBondId">
      SELECT SEQ_RULES_BOND.Nextval from DUAL
    </selectKey>
    insert into RULES_BOND
    (RB_ID,
    RC_ID,
    BOND_CODE,
    BID_STRATEGY_ID,
    OFR_STRATEGY_ID,
    STATUS,
    OPERATOR_ID,
    LAST_UPDATED_DATE)
    values (#{ruleBondId,jdbcType=NUMERIC},
    #{ruleConditionId,jdbcType=NUMERIC},
    #{bondCode,jdbcType=VARCHAR},
    #{bidStrategyId,jdbcType=VARCHAR},
    #{ofrStrategyId,jdbcType=VARCHAR},
    #{status,jdbcType=VARCHAR},
    #{operatorId,jdbcType=VARCHAR},
    systimestamp)
  </insert>
  1. 批量新增

参照网上写了一下,一直报缺失表达式,原来是insert into后面 是不需要 values的;

还有就是关于Oracle返回主键List ,我在网上暂时还没找到能正确执行的例子 ,求大佬告知

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<insert id="addRuleBondList" parameterType="java.util.List">
    insert into RULES_BOND
    (RB_ID,
    RC_ID,
    BOND_CODE,
    BID_STRATEGY_ID,
    OFR_STRATEGY_ID,
    STATUS,
    OPERATOR_ID,
    LAST_UPDATED_DATE
    )
    SELECT  SEQ_RULES_BOND.NEXTVAL,t.*
    FROM (
    <foreach close=")" collection="ruleBonds" item="item" index="index" open="(" separator="union ALL">
      select
      #{item.ruleConditionId,jdbcType=NUMERIC},
      #{item.bondCode,jdbcType=VARCHAR},
      #{item.bidStrategyId,jdbcType=VARCHAR},
      #{item.ofrStrategyId,jdbcType=VARCHAR},
      #{item.status,jdbcType=VARCHAR},
      #{item.operatorId,jdbcType=VARCHAR},
       systimestamp
      from dual
    </foreach>
      ) t
  </insert>
  1. 批量新增,存在则插入
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<insert id="generateBaselines" parameterType="java.util.List">
    MERGE INTO RULES_CONDITION t
    USING (
    <foreach collection="ruleConditions" item="item" index="index" separator="union">
      select #{item.ruleConditionId,jdbcType=NUMERIC} id,
      #{item.ruleCatOne,jdbcType=VARCHAR} cat1,
      #{item.ruleCatTwo,jdbcType=VARCHAR} cat2,
      #{item.bondCodeOne,jdbcType=VARCHAR} code1,
      #{item.bondCodeTwo,jdbcType=VARCHAR} code2,
      #{item.ruleOperateSymbol,jdbcType=VARCHAR} symbol,
      #{item.operatorId,jdbcType=VARCHAR} u
      from DUAL
    </foreach>) t1
    <!-- 哪些条件相符-->
    ON (t.RULE_CAT1 = t1.cat1 AND t.RULE_CAT2 = t1.cat2 AND t.RC_OPER_TYPE = t1.symbol)
    <!--符合条件时-->
    WHEN MATCHED THEN
    UPDATE SET t.BOND_CODE_1 = t1.code1,t.BOND_CODE_2 = t1.code2,t.LAST_UPDATED_DATE = default
    <!--不符合条件时-->
    WHEN NOT MATCHED THEN
    INSERT(RC_ID, RULE_CAT1, RULE_CAT2, RC_OPER_TYPE, RULE_REF, BOND_CODE_1, BOND_CODE_2,RC_STATUS,OPERATOR_ID,LAST_UPDATED_DATE)
    VALUES (SEQ_RULES_CONDITION.nextval, t1.cat1, t1.cat2, t1.symbol, '1', t1.code1, t1.code2, '0', t1.u,default)
  </insert>
三. 修改

(begin,end最好还是加上,之前报错一直找不到错,加上begin,end就好了;end前后都加分号”;”,begin不用加)

  1. 普通修改
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<update id="modifyRuleBond" parameterType="com.xxx.domain.RuleBond">
    begin
    update RULES_BOND
    set
    <if test="bidStrategyId!=null">
      BID_STRATEGY_ID=#{bidStrategyId,jdbcType=VARCHAR},
    </if>
    <if test="ofrStrategyId!=null">
      OFR_STRATEGY_ID=#{ofrStrategyId,jdbcType=VARCHAR},
    </if>
    <if test="operatorId!=null">
      OPERATOR_ID=#{operatorId,jdbcType=VARCHAR},
    </if>
    <if test="status!=null">
      STATUS=#{status,jdbcType=VARCHAR},
    </if>
    LAST_UPDATED_DATE=SYSTIMESTAMP
    WHERE RB_ID = #{ruleBondId,jdbcType=NUMERIC};
    end;
  </update>
  1. 批量修改(begin,end加在 foreach的open和close处,记得加上分号)
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<update id="modifyRuleCondition" parameterType="java.util.List">
    <foreach collection="ruleConditions" item="item" index="index" open="begin" close=";end;" separator=";">
      UPDATE RULES_CONDITION
      <set>
        <if test="item.ruleRef!=null">
          RULE_REF=#{item.ruleRef,jdbcType=VARCHAR},
        </if>
        <if test="item.effectTimeOfStart!=null">
          START_EFFECT_TIME=#{item.effectTimeOfStart,jdbcType=VARCHAR},
        </if>
        <if test="item.effectTimeOfEnd!=null">
          END_EFFECT_TIME= #{item.effectTimeOfEnd,jdbcType=VARCHAR},
        </if>
        <if test="item.bpThreshold!=null">
          BP_THRESHOLD= #{item.bpThreshold,jdbcType=NUMERIC},
        </if>
        <if test="item.ruleStatus!=null">
          RC_STATUS= #{item.ruleStatus,jdbcType=VARCHAR},
        </if>
        <if test="item.operatorId!=null">
          OPERATOR_ID= #{item.operatorId,jdbcType=VARCHAR},
        </if>
        LAST_UPDATED_DATE=default,
      </set>
      WHERE RC_ID = #{item.ruleConditionId,jdbcType=INTEGER}
    </foreach>
  </update>
四. 删除
  1. 普通删除
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<delete id="deleteRuleBond" parameterType="com.xxx.domain.RuleBond">
    delete
    from RULES_BOND
    where RB_ID = #{ruleBondId}
      AND TO_TIMESTAMP(TO_CHAR(LAST_UPDATED_DATE, 'yyyy-MM-dd hh24:mi:ss'), 'yyyy-MM-dd hh24:mi:ss') = #{lastUpdateTime,jdbcType=TIMESTAMP}
  </delete>

  1. 批量删除

    ​ 1)批量执行语句

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    <delete id="batchDeleteRuleBond" parameterType="java.util.List">
        <foreach collection="ruleBonds" open="begin" close=";end;" item="item" separator=";">
          DELETE FROM RULES_BOND
          WHERE RB_ID = #{item.ruleBondId} and TO_TIMESTAMP(TO_CHAR(LAST_UPDATED_DATE, 'yyyy-MM-dd hh24:mi:ss'), 'yyyy-MM-dd hh24:mi:ss') = #{item.lastUpdateTime,jdbcType=TIMESTAMP}
        </foreach>
      </delete>

    ​ 2)综合成一条语句执行

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    <delete id="batchDeleteRuleBond" parameterType="java.util.List">
        DELETE FROM RULES_BOND
        WHERE RB_ID IN (
        SELECT A.RB_ID FROM (
        <foreach collection="ruleBonds" item="item" separator="UNION All">
          SELECT * FROM RULES_BOND
          WHERE RB_ID = #{item.ruleBondId} AND TO_TIMESTAMP(TO_CHAR(LAST_UPDATED_DATE, 'yyyy-MM-dd hh24:mi:ss'), 'yyyy-MM-dd hh24:mi:ss') = #{item.lastUpdateTime,jdbcType=TIMESTAMP}
        </foreach>
        )A
        )
      </delete>

    ​