1.insert標籤
2.update標籤
3.delete標籤
4.select標籤
5.sql標籤
6.include標籤
7.bind標籤 參數綁定,比如like查詢
8.if標籤
9.where標籤 where 標記會自動將其後第一個條件的and或者是or給忽略掉
<where>
<if test="id != null ">id=#{id}</if>
<if test="name != null and name.length()>0" >and name=#{name}</if>
<if test="gender != null and gender.length()>0">and gender = #{gender}</if>
</where>
10.foreach標籤
11.trim標籤
<select id="queryBy" resultType="com.scme.pojo.User" parameterType="com.scme.pojo.User">
select * from user
<trim prefix="WHERE" prefixOverrides="AND |OR ">
<if test="username!=null and password!=null">
and username=#{username} and password=#{password}
</if>
</trim>
<!-- 效果同上
<where>
<if test="username!=null and password!=null">
and username=#{username} and password=#{password}
</if>
</where> -->
</select>
12.choose when otherwise標籤
13.set標籤