【转】【Java之Mybatis】动态SQL

转：http://limingnihao.iteye.com/blog/782190 if test -- 检测值是否符合条件 foreach -- where xx in (...) 循环 selectKey

<insert id="saveOrUpdate" >
  <selectKey keyProperty="count" resultType="int" order="BEFORE">
    select count(*) from country where id = #{id}
  </selectKey>
  <if test="count > 0">
    update country
    set countryname = #{countryname},countrycode = #{countrycode}
    where id = #{id}
  </if>
  <if test="count==0">
    insert into country values(#{id},#{countryname},#{countrycode})
  </if>
</insert>

vagabond1-1983 / blog

【转】【Java之Mybatis】动态SQL #38