There is no getter for property named 'XXX' in 'class java.lang.String'解决方法

    <select id="ProjectHomePage" parameterType="string" resultType="java.util.HashMap">

        SELECT 字段1,字段2,字段3  FROM 表名

                <where>

                =

                <if test="_parameter != null">

                    and type=#{type}

                </if>

                    and delstate=

                </where>

    </select>

把 #{XXXX}改为  _parameter != null