There is no getter-named xxx ' in ' Class Java.lang.xxx '

In xxxmapper.xml we use SQL fragments to improve the reusability of SQL code, which is often the case when newbies pass in parameters:

There is no getter-named xxx ' in ' Class Java.lang.xxx '

① appearance Reason: We entity class has getter method, why MyBatis can't recognize it, the original mybatis by default Ongl parsing parameters, so will automatically use the object tree form to take java.lang.xxx.xxx value, so caused error.

② Workaround: 1) Change the incoming parameter to _parameter so you can, for example:

<sql id= "Wherecadtion" >
<if test= "_parameter" >
and Area_id=#{_parameter}
</if>
</sql>
<sql id= "Base_column_list" >
Id,dept_name,user_name,job_name,days,entry_core,area_id,area_name
</sql>
<select id= "findallcarentry" parametertype= "int" resultmap= "Resultmap" >
Select <include refid= "Base_column_list"/> from Vie_car_entry_top
<where>
<include refid= "Wherecadtion"/>
</where>
</select>

2) Specify the parameter value for the interface parameter name. For example:

Public List MethodName (@Param (value= "TJ") String TJ);

There is no getter-named xxx ' in ' Class Java.lang.xxx '