今天做商城购物的时候，再原有表基础上加了一个double类型的字段，抛出了这个异常：
exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of...
原因：查询结果中包含null的项 对于一些数字项包含null，定义该项时必须使用wrapper类型，而不能是primitive类型，例如使用Integer等，而不能是int否则会抛出exception!
解决：映射为int，double的字段,在建表时，某些int或者double字段的default 0,导致exception setting property value with CGLIB setter 这些字段出错.这些字段最后都有默认值.设置好默认值问题就可以解决了。
exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of...
原因：查询结果中包含null的项 对于一些数字项包含null，定义该项时必须使用wrapper类型，而不能是primitive类型，例如使用Integer等，而不能是int否则会抛出exception!
解决：映射为int，double的字段,在建表时，某些int或者double字段的default 0,导致exception setting property value with CGLIB setter 这些字段出错.这些字段最后都有默认值.设置好默认值问题就可以解决了。
argument type mismatch异常：
这表明有部分属性的数据类型不匹配，比如下列情况
当我们有一个HIBERNATE实体，并且在表单提交到ACTION后，并不想强转为 ACTIONFORM，而是想将 FORM直接转成HIBERNATE实体如下：
原本情况： UserForm userForm=(UserForm)form;
现情况： User user=(User)form;或你有BEANUTIL这个工具的写法是User user=BeanUtils.copyProperties(new User(), form);
这表明有部分属性的数据类型不匹配，比如下列情况
当我们有一个HIBERNATE实体，并且在表单提交到ACTION后，并不想强转为 ACTIONFORM，而是想将 FORM直接转成HIBERNATE实体如下：
原本情况： UserForm userForm=(UserForm)form;
现情况： User user=(User)form;或你有BEANUTIL这个工具的写法是User user=BeanUtils.copyProperties(new User(), form);
Tags: 异常
郁闷了好久，终于在goole上找到了错误原因
ObjectNotFoundException: No row with the given identifier exists
Where it can occur:
This might occur if you try to load a non-proxied object with session.load() or you load a proxied object and later access the proxy. It may also occur when loading mapped collections which are not eagerly fetched.
What it means:
This means just what it says - Hibernate expected to have a row with a certain id in the database, and did however not find it.
How it can be caused:
ObjectNotFoundException: No row with the given identifier exists
Where it can occur:
This might occur if you try to load a non-proxied object with session.load() or you load a proxied object and later access the proxy. It may also occur when loading mapped collections which are not eagerly fetched.
What it means:
This means just what it says - Hibernate expected to have a row with a certain id in the database, and did however not find it.
How it can be caused:
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