Could not open Hibernate Session for transaction

错误提示信息：

org.apache.jasper.JasperException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
  org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
  org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
  org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
  org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:75)
  org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
 
 
  root cause
 
  org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
  org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:548)
  org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:282)
  org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:225)
  org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:89)
  org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
  org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
  $Proxy8.getRecommendationEquipList(Unknown Source)
  org.apache.jsp.xjtuequipment.index_jsp._jspService(index_jsp.java:138)
  org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
  org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
  org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
  org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
  org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:75)
  org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

 

 

可能的原因：
1.数据库连接问题
2.服务器没开
3.数据库连接端口被屏蔽
4.连接部分代码错误等原因。

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