Mybatis配置文件中Insert 元素标签添加配置有哪些呢？

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Insert 元素标签添加方式

• 添加记录不返回主键配置
• 添加记录返回主键1（属性配置）
• 添加记录返回主键2（属性配置）
• 批量添加记录返回影响总记录行数（属性配置）

案例实操

添加记录不返回主键配置

<insert id="addUserNoKey" parameterType="User">        
    insert into  user(userName,userPwd) values(#{userName},#{userPwd})
</insert>

添加记录返回主键1（属性配置）

<insert id="addUserHasKey1"  parameterType="user">    
    <selectKey keyProperty="id" order="AFTER" resultType="int">     
        select LAST_INSERT_ID() as id       
    </selectKey>    
    insert into user(userName,userPwd) values(#{userName},#{userPwd})
</insert>

Oracle 情况

<selectKey resultType="int" order="BEFORE" keyProperty="id">  
        SELECT LOGS_SEQ.nextval AS ID FROM DUAL  
</selectKey>  

添加记录返回主键2（属性配置）

<insert id="addUserHasKey2" parameterType="user" useGeneratedKeys="true"keyProperty="id">    
    insert into user(userName,userPwd) values(#{userName},#{userPwd})
</insert>

批量添加记录返回影响总记录行数（属性配置）

<insert id="addUserBatch" parameterType="list" >    
    insert into user(user_name,user_pwd) values    
    <foreach collection="list" item="item" separator=",">     
        (#{item.userName},#{item.userPwd})   
    </foreach> 
</insert>

扩展

Update 元素标签使用

更新单条记录返回影响行数

<!-- 更新单条 -->
<update id="updateUser" parameterType="User">
    update user set userName=#{userName} ,userPwd=#{userPwd} where id=#{id}
</update>

批量更新多条记录 属性配置

<update id="updateUserBatch" parameterType="java.util.Map">   
    update user set userPwd=#{pwd} where id in      
    <foreach collection="ids" item="item" open="(" separator=","  close=")">   
        #{item}        
    </foreach>
</update>

Delete 元素标签使用

删除单条记录

<delete id="delUserById" parameterType="int">     
    delete from user where  id=#{id}
</delete>

批量删除多条记录（属性配置）

<delete id="delUserBatch" parameterType="java.util.Map">     
    delete from user where   id in       
    <foreach collection="ids" item="item" open="(" separator="," close=")"index="index">
        #{item}   
    </foreach>
</delete>

或下列形式，入参为数组类型

<delete id="deleteUserBatch2" >
    delete from user where id in 
    <foreach collection="array" item="item" open="(" separator="," close=")">
        #{item}
    </foreach>
 </delete>

h collection="array" item="item" open="(" separator="," close=")">

    #{item}
</foreach>

</delete>

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