Mybatis笔记四：nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named \'id\' in \'class java.lang.String\'

错误异常：nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named \'id\' in \'class java.lang.String\'

映射器类(Mapper interface)

public interface NarCodeService {
    
    public NarCode getNarCode(String id);

}

Xml映射文件配置(部分)

<select  parameterType="java.lang.String"
         resultType="narCode">
         select
         <include ref></include>
         from nar_code
         <where>
             <if test="id != null">
                 id=#{id,jdbcType=VARCHAR}
             </if>
         </where>
 </select>

这是Mybatis Xml映射文件配置，当我执行这个映射select语句时报错：nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named \'id\' in \'class java.lang.String\'

解决办法有两种：

1.去掉sql语句的if标签限制

<if test="id != null">
     id=#{id,jdbcType=VARCHAR}
</if>
  改为：
java.lang.String"参数改为传一个自定义实体对象或者HashMap来封装这个id参数
原因:可以在自定义实体对象或者HashMap中找到这个id属性