Mybatis the update using dynamic SQL statement

Remember a note: pit mybatis encounter

Update operation performed when Mybatis;

Some data does not have to be modified, and therefore pass from the front desk over the data, some items may be null;

An exception will be during sql statement; the operation fails;

So stitching for dynamic SQL statements:

Change in UserMapper.xml in:

    <update id="updateUser" parameterType="map" >
        update saishiguanli.user
        <trim prefix="set" suffixOverrides=",">
            <if test="ulevel!=null">ulevel=#{ulevel},</if>
            <if test="ugender!=null">ugender=#{ugender},</if>
            <if test="uname!=null">uname=#{uname},</if>
            <if test="upwd!=null">upwd=#{upwd},</if>
            <if test="unickname!=null">unickname=#{unickname},</if>
            <if test="uimage!=null">uimage=#{uimage},</if>
            <if test="uphone!=null">uphone=#{uphone},</if>
            <if test="ucreatetime!=null">ucreatetime=#{ucreatetime},</if>
        </trim>
        where uid = #{uid}
    </update>