mybatis3/test/xml/trim-where-set.xml

mybatis3 mapper

<?xml version="1.0"?>
<query>
	<select id="getList">
		SELECT * FROM BLOG
		<where>
			<if test=":state != null">
				state = :state
			</if>
			<if test=":title != null">
				AND title like :title
			</if>
			<if test=":author != null and :author.name != null">
				AND author_name like :author.name
			</if>
		</where>
	</select>
	<select id="getList2">
		SELECT * FROM BLOG
		<trim prefix="WHERE" prefixOverrides="AND |OR ">
			<if test=":state != null">
				state = :state
			</if>
			<if test=":title != null">
				AND title like :title
			</if>
			<if test=":author != null and :author.name != null">
				AND author_name like :author.name
			</if>
		</trim>
	</select>
	<update id="updateAuthorIfNecessary">
		update Author
		<set>
			<if test=":username != null">
				username=:username,
			</if>
			<if test=":password != null">
				password=:password,
			</if>
			<if test=":email != null">
				email=:email,
			</if>
			<if test=":bio != null">
				bio=:bio
			</if>
		</set>
		where id=:id
	</update>
</query>