Mybatis单个参数的if判断(针对异常:There is no getter for property..)------mybatis的内置对象


这里有一个删除方法:
int deleteByPrimaryKey(Integer id);
然后对应的sql的xml如下:

  delete from tablename
  where id = #{id,jdbcType=INTEGER}
以上是单个参数一般的写法。
但是如果我下面的同样也是单个参数,但是且报错了:There is no getter for property..!!
DAO:
List
recommandList( Integer siteid);
XML:
为什么呢?因为if里面用了mybatis的内置对象,例如这里:“
 


为了解决这个问题,代码修改:
DAO:
List
recommandList(@Param("siteid") Integer siteid);

如上修改,给siteid @Param注入getter 即可。

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