分析：异常信息提示错误出在C3P0连接池，检查applicationContext.xml后发现并没有什么错误，于是我们可以锁定问题出在 jar 库依赖，问题的出现可能就是 jar 库冲突，选择性地删掉一个就OK了。

严重: 在路径为[/SSH02-SpringWebPojo]的上下文中，servlet[servlets.RegisterServlet]的Servlet.service()引发异常
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘dataSource’ defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mchange.v2.c3p0.ComboPooledDataSource]: Constructor threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory 1. g e t O b j e c t ( A b s t r a c t B e a n F a c t o r y . j a v a : 306 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . D e f a u l t S i n g l e t o n B e a n R e g i s t r y . g e t S i n g l e t o n ( D e f a u l t S i n g l e t o n B e a n R e g i s t r y . j a v a : 230 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . A b s t r a c t B e a n F a c t o r y . d o G e t B e a n ( A b s t r a c t B e a n F a c t o r y . j a v a : 302 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . A b s t r a c t B e a n F a c t o r y . g e t B e a n ( A b s t r a c t B e a n F a c t o r y . j a v a : 197 ) a t o r g . s p r i n g f r a m e w o r k . b e a n s . f a c t o r y . s u p p o r t . D e f a u l t L i s t a b l e B e a n F a c t o r y . p r e I n s t a n t i a t e S i n g l e t o n s ( D e f a u l t L i s t a b l e B e a n F a c t o r y . j a v a : 776 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . f i n i s h B e a n F a c t o r y I n i t i a l i z a t i o n ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 861 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . A b s t r a c t A p p l i c a t i o n C o n t e x t . r e f r e s h ( A b s t r a c t A p p l i c a t i o n C o n t e x t . j a v a : 541 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . C l a s s P a t h X m l A p p l i c a t i o n C o n t e x t . < i n i t > ( C l a s s P a t h X m l A p p l i c a t i o n C o n t e x t . j a v a : 139 ) a t o r g . s p r i n g f r a m e w o r k . c o n t e x t . s u p p o r t . C l a s s P a t h X m l A p p l i c a t i o n C o n t e x t . < i n i t > ( C l a s s P a t h X m l A p p l i c a t i o n C o n t e x t . j a v a : 83 ) a t s e r v l e t s . R e g i s t e r S e r v l e t . d o G e t ( R e g i s t e r S e r v l e t . j a v a : 35 ) a t s e r v l e t s . R e g i s t e r S e r v l e t . d o P o s t ( R e g i s t e r S e r v l e t . j a v a : 46 ) a t j a v a x . s e r v l e t . h t t p . H t t p S e r v l e t . s e r v i c e ( H t t p S e r v l e t . j a v a : 652 ) a t j a v a x . s e r v l e t . h t t p . H t t p S e r v l e t . s e r v i c e ( H t t p S e r v l e t . j a v a : 733 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . A p p l i c a t i o n F i l t e r C h a i n . i n t e r n a l D o F i l t e r ( A p p l i c a t i o n F i l t e r C h a i n . j a v a : 231 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . A p p l i c a t i o n F i l t e r C h a i n . d o F i l t e r ( A p p l i c a t i o n F i l t e r C h a i n . j a v a : 166 ) a t o r g . a p a c h e . t o m c a t . w e b s o c k e t . s e r v e r . W s F i l t e r . d o F i l t e r ( W s F i l t e r . j a v a : 53 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . A p p l i c a t i o n F i l t e r C h a i n . i n t e r n a l D o F i l t e r ( A p p l i c a t i o n F i l t e r C h a i n . j a v a : 193 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . A p p l i c a t i o n F i l t e r C h a i n . d o F i l t e r ( A p p l i c a t i o n F i l t e r C h a i n . j a v a : 166 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d W r a p p e r V a l v e . i n v o k e ( S t a n d a r d W r a p p e r V a l v e . j a v a : 202 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d C o n t e x t V a l v e . i n v o k e ( S t a n d a r d C o n t e x t V a l v e . j a v a : 96 ) a t o r g . a p a c h e . c a t a l i n a . a u t h e n t i c a t o r . A u t h e n t i c a t o r B a s e . i n v o k e ( A u t h e n t i c a t o r B a s e . j a v a : 541 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d H o s t V a l v e . i n v o k e ( S t a n d a r d H o s t V a l v e . j a v a : 139 ) a t o r g . a p a c h e . c a t a l i n a . v a l v e s . E r r o r R e p o r t V a l v e . i n v o k e ( E r r o r R e p o r t V a l v e . j a v a : 92 ) a t o r g . a p a c h e . c a t a l i n a . v a l v e s . A b s t r a c t A c c e s s L o g V a l v e . i n v o k e ( A b s t r a c t A c c e s s L o g V a l v e . j a v a : 690 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . S t a n d a r d E n g i n e V a l v e . i n v o k e ( S t a n d a r d E n g i n e V a l v e . j a v a : 74 ) a t o r g . a p a c h e . c a t a l i n a . c o n n e c t o r . C o y o t e A d a p t e r . s e r v i c e ( C o y o t e A d a p t e r . j a v a : 343 ) a t o r g . a p a c h e . c o y o t e . h t t p 11. H t t p 11 P r o c e s s o r . s e r v i c e ( H t t p 11 P r o c e s s o r . j a v a : 373 ) a t o r g . a p a c h e . c o y o t e . A b s t r a c t P r o c e s s o r L i g h t . p r o c e s s ( A b s t r a c t P r o c e s s o r L i g h t . j a v a : 65 ) a t o r g