Caused by: org.apache.ibatis.ognl.ParseException: Encountered “”——MyBatis

使用MyBatis时遇到一个问题，其核心错误信息如下：

Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression ''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression:  [org.apache.ibatis.ognl.ParseException: Encountered "<EOF>" at line 1, column 0.
Was expecting one of:
    ":" ...
    "not" ...
    "+" ...
    "-" ...
    "~" ...
    "!" ...
    "(" ...
    "true" ...
    "false" ...
    "null" ...
    "#this" ...
    "#root" ...
    "#" ...
    "[" ...
    "{" ...
    "@" ...
    "new" ...
    <IDENT> ...
    <DYNAMIC_SUBSCRIPT> ...
    "\'" ...
    "`" ...
    "\"" ...
    <INT_LITERAL> ...
    <FLT_LITERAL> ...
    ]

Caused by: org.apache.ibatis.ognl.ParseException: Encountered "<EOF>" at line 1, column 0.
Was expecting one of:
    ":" ...
    "not" ...
    "+" ...
    "-" ...
    "~" ...
    "!" ...
    "(" ...
    "true" ...
    "false" ...
    "null" ...
    "#this" ...
    "#root" ...
    "#" ...
    "[" ...
    "{" ...
    "@" ...
    "new" ...
    <IDENT> ...
    <DYNAMIC_SUBSCRIPT> ...
    "\'" ...
    "`" ...
    "\"" ...
    <INT_LITERAL> ...
    <FLT_LITERAL> ...

经过多番查找，发现问题出现在了select代码中得if判断码上，正常的if判断语句应是：

<if test="param.gender!=null and param.gender!=''">
			and t1.GENDER = #{param.gender}
</if>

param：是存放查询条件的参数的集合；

pass:多细心，多努力！
《END》