mybatis--org.apache.ibatis.ognl.ExpressionSyntaxException异常

mybatis--org.apache.ibatis.ognl.ExpressionSyntaxException

完整异常信息如下：

Error updating database. Cause: org.apache.ibatis.builder.BuilderException: Error evaluating expression ''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: [org.apache.ibatis.ognl.ParseException: Encountered " " at line 1, column 0.

Was expecting one of:
":" ...
"not" ...
"+" ...
"-" ...
"~" ...
"!" ...
"(" ...
"true" ...
"false" ...
"null" ...
"#this" ...
"#root" ...
"#" ...
"[" ...
"{" ...
"@" ...
"new" ...
...
<DYNAMIC_SUBSCRIPT> ...
"'" ...
"`" ...
""" ...
<INT_LITERAL> ...
<FLT_LITERAL> ...
]

···············

at org.apache.ibatis.ognl.OgnlParser.generateParseException(OgnlParser.java:3172)
at org.apache.ibatis.ognl.OgnlParser.jj_consume_token(OgnlParser.java:3051)
at org.apache.ibatis.ognl.OgnlParser.unaryExpression(OgnlParser.java:1236)
at org.apache.ibatis.ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971)
at org.apache.ibatis.ognl.OgnlParser.additiveExpression(OgnlParser.java:894)
at org.apache.ibatis.ognl.OgnlParser.shiftExpression(OgnlParser.java:750)
at org.apache.ibatis.ognl.OgnlParser.relationalExpression(OgnlParser.java:508)
at org.apache.ibatis.ognl.OgnlParser.equalityExpression(OgnlParser.java:405)
at org.apache.ibatis.ognl.OgnlParser.andExpression(OgnlParser.java:352)
at org.apache.ibatis.ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299)
at org.apache.ibatis.ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246)
at org.apache.ibatis.ognl.OgnlParser.logicalAndExpression(OgnlParser.java:193)
at org.apache.ibatis.ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140)
at org.apache.ibatis.ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101)
at org.apache.ibatis.ognl.OgnlParser.assignmentExpression(OgnlParser.java:64)
at org.apache.ibatis.ognl.OgnlParser.expression(OgnlParser.java:23)
at org.apache.ibatis.ognl.OgnlParser.topLevelExpression(OgnlParser.java:15)
at org.apache.ibatis.ognl.Ognl.parseExpression(Ognl.java:110)
... 20 more

<!-- 这次的原因是foreach标签没有填写内容-->
	<foreach collection="" close=""  item="" open="" separator="">
	</foreach>
<!-- mapper.xml中foreach没有填写完整的内容-->

原因：mapper文件中有标签的一些内容包含空格，输入的信息不完整。

解决方案：去掉空格或填补好信息就可以，逐一排查各个标签。