sql.xml

<mapper namespace = "cc.dd">
	<sql id="limit_num">
		time&lt;'2020-3-3' and  time &gt; '2019-12-12'
		limit #{p._start}, #{p._end}
	</sql>


	<select id="selectAllUser">
	    select * from user
	    where uname like '%${u_name}',
	    and usex = #{u_sex}
	    <if test="bio ~= nil">bio=#{bio}</if><include refid = "limit_num" />
	</select>

	<select id="findActiveBlogLike"  resultType="Blog">
		SELECT * FROM BLOG 
		<where> 
			<if test="state ~= nil">
				state = #{state}
			</if> 
			<if test="title ~= nil">
				AND title like #{title}
			</if>
			<if test="author ~= nil and author.name ~= nil">
				AND author_name like '%${author.name}'
			</if>
		</where>
	</select>

	<update id="updateUser" parameterType="com.it.bean.user">
        update user
        <set>
            <if test="username ~= nil and username ~= ''">
                username = #{username},
            </if>
            <if test="sex ~= nil and sex == 0 or sex == 1">
                sex = #{sex},
            </if>
            <if test="birthday ~= nil ">  
                birthday = #{birthday},
            </if >  
            <if test="lastModifiedBy ~= nil and lastModifiedBy ~= ''">
                last_modified_by = #{lastModifiedBy},
                last_modified_date = SYSDATE,
            </if>
        </set>
        <where>
            id = #{id}
        </where>
    </update>



	<select id="dynamicChooseTest" parameterType="Blog" resultType="Blog">
        select * from t_blog
        <where>
	        <choose>
	            <when test="title ~= nil">
	                and title = #{title}
	            </when>
	            <when test="content ~= nil">
	                and content = #{content}
	            </when>
	            <otherwise>
	                and owner = "owner1"
	            </otherwise>
	        </choose>
	    </where>
    </select>

    <update id="updateByForeach">
        update sys_user
        set
        <foreach collection="users" item="val" index="key" separator=",">
            ${key}=#{val}
        </foreach>
        where id=#{id}
    </update>


    <insert id="inserSysUser">
        insert into sys_user(
        user_name,user_password,user_email)
        values
        <foreach collection="list" item="user" separator="," >
            (
            #{user.userName},#{user.userPassword},#{user.userEmail}
            )
        </foreach>
    </insert>

    <select id="getFieldsValue" parameterType="java.util.Map" resultType="java.util.HashMap">
        SELECT * FROM
        #{tableName} t
			<if test="conditions ~= nil and #conditions &gt; 0">
            <where>
                <foreach collection="conditions" item="item">
                    <choose>
	                    <when test='item.condition_type == 1'>
	                        AND integral BETWEEN #{item.condition_min} AND #{item.condition_max}
	                    </when>
	                    <when test='item.condition_type == 2'> 
	                        AND consume_money BETWEEN #{item.condition_min} AND #{item.condition_max}
	                    </when>
                    </choose>
                </foreach>
            </where>
      </if>

    </select>


    <insert id="insertSelective" parameterType="com.model.Carousel" >
    insert into carousel
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="uid ~= nil" >
        uid,
      </if>
      <if test="title ~= nil" >
        title,
      </if>
      <if test="showimg ~= nil" >
        showimg,
      </if>
      <if test="looked ~= nil" >
        looked,
      </if>
      <if test="content ~= nil" >
        content,
      </if>
      <if test="showpart ~= nil" >
        showpart,
      </if>
       createtime
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="caid ~= nil" >
        #{caid},
      </if>
      <if test="uid ~= nil" >
        #{uid},
      </if>
      <if test="title ~= nil" >
        #{title},
      </if>
      <if test="showimg ~= nil" >
        #{showimg},
      </if>
      <if test="looked ~= nil" >
        #{looked},
      </if>
      <if test="content ~= nil" >
        #{content},
      </if>
      <if test="showpart ~= nil" >
        #{showpart},
      </if>
      now()
    </trim>
  </insert>


	<update id="updateUserInfo" parameterType="com.it.bean.User">
   		update user
        <!-- 开头加上set，结尾去除最后一个逗号 -->
        <trim prefix="set" suffixOverrides=",">
            <if test="username~= nil and username ~= ''">
                name= #{username},
            </if>

            <if test="password~=nil and password ~= ''">
                password= #{password} ,
            </if>

        </trim>
        <where>
            id = #{id}
        </where>
    </update>
</mapper>