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> 1=1 <if test="_parameter != null"> and type=#{type} </if> and delstate=1 </where> </select>
把 #{XXXX}改为 _parameter != null