1.检查实体类相应的字段名以及set，get方法（仔仔细细看）
2.检查mapper.xml取值字段
3.注意实体类中isDelete等类似 isXxx的字段 set get方法会变成GetDelete() SetDelete(),手动改过来
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项目重启后, Mybatis报错org.apache.ibatis.ognl.NoSuchPropertyException分析
解决：org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'requestMap.maintenancename != null and requestMap.maintenance
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org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "enterpCd")-Mybatis报错
org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manu
org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
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