出现这种错误表面mybatis配置文件中sql查询语句中出现了中文字符，需要将对应的中文字符修改为英文。
ERROR 10500 --- [nio-8081-exec-8] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'pay ！= null'. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: pay ！= null [org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 5. Encountered: "\uff01" (65281), after : ""]] with root cause