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Java 无法与SpringForm和Hibernate建立JDBC连接

java spring hibernate jdbc

Java 无法与SpringForm和Hibernate建立JDBC连接,java,spring,hibernate,jdbc,spring-orm,Java,Spring,Hibernate,Jdbc,Spring Orm,我正在尝试一个简单的SpringORM程序，它将从MySQL获取数据并显示其中的数据。但是当尝试运行应用程序时，它显示无法建立JDBC连接。下面是JDBC连接的bean <bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverC

我正在尝试一个简单的SpringORM程序，它将从MySQL获取数据并显示其中的数据。但是当尝试运行应用程序时，它显示无法建立JDBC连接。下面是JDBC连接的bean

<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3307/mydatabase"></property>
<property name="user" value="root"></property>
<property name="password" value=""></property>

<property name="minPoolSize" value="5" />
<property name="maxPoolSize" value="10" />
<property name="maxIdleTime" value="30000" />
</bean>
我与数据库连接的Dao类如下 包com.thiluxan.springorm.dao

import java.util.List;

import javax.transaction.Transactional;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.thiluxan.springorm.model.*;
//import com.mysql.cj.xdevapi.SessionFactory;

@Component
public class StudentDao {
    
    @Autowired
    private SessionFactory sessionFactory;
    
    @Transactional
    public List<Student> getStudents(){
        Session session = sessionFactory.getCurrentSession();
        List<Student> students = session.createQuery("from students",Student.class).list();
        
        return students;
    }
}

import java.util.List；
导入javax.transaction.Transactional；
导入org.hibernate.Session；
导入org.hibernate.SessionFactory；
导入org.springframework.beans.factory.annotation.Autowired；
导入org.springframework.stereotype.Component；
导入com.thiluxan.springorm.model.*；
//导入com.mysql.cj.xdevapi.SessionFactory；
@组成部分
公立班学生{
@自动连线
私人会话工厂会话工厂；
@交易的
公众学生名单{
Session Session=sessionFactory.getCurrentSession（）；
List students=session.createQuery（“来自students”，Student.class）.List（）；
留学生；
}
}
运行应用程序时，我遇到以下错误：

    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
        org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
        org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
        org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    
    
    root cause
    org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
        org.springframework.orm.hibernate5.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:582)
        org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400)
        org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
        org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:573)
        org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:361)
        org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118)
        org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)
        org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691)
        com.thiluxan.springorm.dao.StudentDao$$EnhancerBySpringCGLIB$$7c5b7c8b.getStudents(<generated>)
        com.thiluxan.springorm.HomeController.viewStudents(HomeController.java:33)
        sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        java.lang.reflect.Method.invoke(Unknown Source)
        org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
        org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
        org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
        org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879)
        org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
        org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
        org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
        org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
        org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
        org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
        org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
    org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
    org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
    org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
    org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:107)
    org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:134)
    org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:259)
    org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:267)
    org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:246)
    org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:83)
    org.hibernate.internal.AbstractSharedSessionContract.beginTransaction(AbstractSharedSessionContract.java:471)
    org.springframework.orm.hibernate5.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:537)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:573)
    org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:361)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)
    org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691)
    com.thiluxan.springorm.dao.StudentDao$$EnhancerBySpringCGLIB$$2cb8dc5e.getStudents(<generated>)
    com.thiluxan.springorm.HomeController.viewStudents(HomeController.java:33)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

org.springframework.web.util.NestedServletException:请求处理失败；嵌套异常为org.springframework.transaction.CannotCreateTransactionException:无法打开事务的Hibernate会话；嵌套异常为org.hibernate.exception.genericjdbception:无法获取JDBC连接
org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:1014）
org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:898）
javaservlet.http.HttpServlet.service（HttpServlet.java:622）
org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:883）
javaservlet.http.HttpServlet.service（HttpServlet.java:729）
org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）
根本原因
org.springframework.transaction.CannotCreateTransactionException:无法为事务打开Hibernate会话；嵌套异常为org.hibernate.exception.genericjdbception:无法获取JDBC连接
org.springframework.orm.hibernate5.HibernateTransactionManager.doBegin（HibernateTransactionManager.java:582）
org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction（AbstractPlatformTransactionManager.java:400）
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction（AbstractPlatformTransactionManager.java:373）
org.springframework.transaction.interceptor.TransactionSpectSupport.createTransactionIfEssential（TransactionSpectSupport.java:573）
org.springframework.transaction.interceptor.TransactionSpectSupport.invokeWithinTransaction（TransactionSpectSupport.java:361）
org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:118）
org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:186）
org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.procedue（CglibAopProxy.java:749）
org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept（CglibAopProxy.java:691）
com.thiluxan.springorm.dao.StudentDao$$EnhancerBySpringCGLIB$$7c5b7c8b.getStudents（）
com.thiluxan.springorm.HomeController.viewStudents（HomeController.java:33）
sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）
sun.reflect.NativeMethodAccessorImpl.invoke（未知源）
sun.reflect.DelegatingMethodAccessorImpl.invoke（未知源）
java.lang.reflect.Method.invoke（未知源）
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke（InvocableHandlerMethod.java:190）
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:138）
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:105）
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:879）
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:793）
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:87）
org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:1040）
org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:943）
org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:1006）
org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:898）
javaservlet.http.HttpServlet.service（HttpServlet.java:622）
org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:883）
javaservlet.http.HttpServlet.service（HttpServlet.java:729）
org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）
org.hibernate.exception.genericjdbception:无法获取JDBC连接
org.hibernate.exception.internal.StandardSQLExceptionConverter.convert（StandardSQLExceptionConverter.java:47）
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert（SqlExceptionHelper.java:113）
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert（SqlExceptionHelper.java:99）
org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.AcquireConnectionInfneed（LogicalConnectionManagedImpl.java:107）
org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection（LogicalConnectionManagedImpl.java:134）
org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnect

jdbc:mysql://localhost:3306/my_database?createDatabaseIfNotExist=true&useSSL=true&useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC&zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8