<select id="checkEmailByUserId" resultType="int" parameterMap="map">
		select count(1) from user
		where email=#{email} and id !=
		#{userId}
	</select>

修改后的方法

	<select id="checkEmailByUserId" resultType="int" parameterType="map">
		select count(1) from user
		where email=#{email} and id !=
		#{userId}
	</select>

如果有多个参数，参数类型一定要是 parameterType="map"

奇怪的mybatis

这里用resultType="cn.li.pojo.User" 可以运行

    <select id="login" parameterType="cn.li.pojo.User" resultType="cn.li.pojo.User" >
        select * from t_user where loginname=#{loginName} and loginpass=#{loginPass}
    </select>

这里用parameterType="cn.li.pojo.Order"不可以运行

<insert id="creatOrder" parameterType="cn.li.pojo.Order">
        insert into t_order (oid,ordertime,total ,status,address,uid)
        values(#{oid},#{ordertime},#{total},#{status},#{address},#{uid})
    </insert>

必须改为<insert id="creatOrder" parameterType="map">map代表可以传多个参数

下面的这个却又不报错

    <insert id="creatOrderitem" parameterType="cn.li.pojo.OrderItem">
        insert into t_orderitem (orderItemId,quantity,subTotal,bid,bname ,currPrice,image_b,oid)
        values(#{orderItemId},#{quantity},#{subTotal},#{bid},#{bname},#{currPrice},#{image_B},#{oid})
    </insert>

搞得我脑壳疼