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<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> |
注意如果insert的parameterType是自定义对象的话，对象里需要有count属性，否则会报count属性找不到的错误