org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connectionat org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:596)at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)at org.springframework.transaction.interceptor.TransactionaspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)at com.sun.proxy.$Proxy4.save(Unknown Source)at test.dao.FundInfoDaoImplTest.testSave(FundInfoDaoImplTest.java:31)at sun.reflect.NativeMethodaccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)at org.junit.runners.ParentRunner.run(ParentRunner.java:236)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Caused by: org.hibernate.exception.GenericJDBCException: Cannot open connectionat org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126)at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114)at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354)at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555)... 33 moreCaused by: java.sql.SQLException: Connections could not be acquired from the underlying database!at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:529)at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:81)at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)... 38 moreCaused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1319)at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)... 41 more

異常描述：與數據庫建立連接失?。?/p>

原因：

一、數據庫連接參數配置錯誤：

1，參數值有空格或換行：<property name="user" value="root "></property>，

　　<propertyname="driverClass"> 　　　　<value>com.MySQL.jdbc.Driver 　　</value>　　</property>

2，參數值不正確：驅動、url地址、數據庫名和密碼是不是要連接的數據庫

二、沒導入數據庫驅動jar。