org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: title != null title !=

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问题：

org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression:  title != null title != '' [org.apache.ibatis.ognl.ParseException: Encountered "title" at line 1, column 16.
Was expecting one of:

<EOF> 
    "," ...
    "=" ...
    "?" ...
    "||" ...
    "or" ...
    "&&" ...
    "and" ...
    "|" ...
    "bor" ...
    "^" ...
    "xor" ...
    "&" ...
    "band" ...
    "==" ...
    "eq" ...
    "!=" ...
    "neq" ...
    "<" ...
    "lt" ...
    ">" ...
    "gt" ...
    "<=" ...
    "lte" ...
    ">=" ...
    "gte" ...
    "in" ...
    "not" ...
    "<<" ...
    "shl" ...
    ">>" ...
    "shr" ...
    ">>>" ...
    "ushr" ...
    "+" ...
    "-" ...
    "*" ...
    "/" ...
    "%" ...
    "instanceof" ...
    "." ...
    "(" ...
    "[" ...
    <DYNAMIC_SUBSCRIPT> ...
    ]

原因：

因为and 没写