我正在尝试使用spring hibernate和jsp运行一个简单表单注册的示例代码。但是，当我尝试在eclipse中运行代码时，我收到以下错误。谢谢您的帮助！
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'con' defined in class path resource [config/spring-hibernate.xml]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:997)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:943)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at com.student.dao.StudentDaoImpl.addStudent(StudentDaoImpl.java:27)
at com.student.controller.RegisterServlet.doPost(RegisterServlet.java:57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:76)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:990)
... 31 more
Caused by: org.hibernate.exception.SQLGrammarException: Error calling Driver#connect
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:123)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator$1$1.convert(BasicConnectionCreator.java:118)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:140)
at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:58)
at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:75)
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:106)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930)
at com.student.bean.DBOperation.<clinit>(DBOperation.java:12)
... 38 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'spring'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:910)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3923)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1273)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:55)
DBOperation.java
package com.student.bean;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class DBOperation {
private static SessionFactory factory;
private Session session;
static{
factory=new Configuration().configure("config/hibernate.cfg.xml").buildSessionFactory();
}
public Session getConnection(){
if(session==null || !session.isOpen()){
session=factory.openSession();
}
return session;
}
}
Student.java
package com.student.bean;
import java.io.Serializable;
public class Student implements Serializable {
private int rollNo;
private String name;
private String address;
public int getRollNo() {
return rollNo;
}
public void setRollNo(int rollNo) {
this.rollNo = rollNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
RegisterServlet.java
package com.student.controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher ;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.student.bean.Student;
import com.student.dao.StudentDaoImpl;
/**
* Servlet implementation class RegisterServlet
*/
public class RegisterServlet extends HttpServlet {
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String page = request.getParameter("page");
RequestDispatcher rd = null;
if (page != null && page.equals("update")) {
String id = request.getParameter("roll");
int roll = 0;
if (id != null)
roll = Integer.parseInt(id);
String name = request.getParameter("name");
String address = request.getParameter("address");
Student student = new Student();
student.setRollNo(roll);
student.setName(name);
student.setAddress(address);
boolean flag = new StudentDaoImpl().updateStudent(student);
if (flag == true)
rd = request.getRequestDispatcher("update.jsp?status=sucess");
else
rd = request.getRequestDispatcher("update.jsp?status=fail");
} else {
String id = request.getParameter("roll");
int roll = 0;
if (id != null)
roll = Integer.parseInt(id);
String name = request.getParameter("name");
String address = request.getParameter("address");
Student student = new Student();
student.setRollNo(roll);
student.setName(name);
student.setAddress(address);
boolean flag = new StudentDaoImpl().addStudent(student);
if (flag == true)
rd = request.getRequestDispatcher("register.jsp?status=sucess");
else
rd = request.getRequestDispatcher("register.jsp?status=fail");
}
if (rd != null)
rd.forward(request, response);
}
}
StudentDao.java
package com.student.dao;
import com.student.bean.Student;
public interface StudentDao {
boolean addStudent(Student student);
boolean updateStudent(Student student);
Student viewStudent(int roll);
boolean deleteStudent(int roll);
}
StudentDaoImpl.java
package com.student.dao;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import com.student.bean.DBOperation;
import com.student.bean.Student;
public class StudentDaoImpl implements StudentDao {
private static Resource resource;
private static BeanFactory factory;
private Session session;
private Transaction transaction;
static{
resource=new ClassPathResource("config/spring-hibernate.xml");
factory=new XmlBeanFactory(resource);
}
public boolean addStudent(Student student) {
if(session==null || !session.isOpen())
session=((DBOperation)factory.getBean("con")).getConnection();
if(session!=null && session.isOpen()){
transaction=session.beginTransaction();
int id=(Integer)session.save(student);
if(id>0){
transaction.commit();
session.close();
return true;
}
}
return false;
}
public boolean updateStudent(Student student) {
if(session==null || !session.isOpen())
session=((DBOperation)factory.getBean("con")).getConnection();
if(session!=null && session.isOpen()){
transaction=session.beginTransaction();
Query query=session.createQuery("update Student set name=?,address=? where id=?");
query.setParameter(0, student.getName());
query.setParameter(1, student.getAddress());
query.setParameter(2, student.getRollNo());
int count=query.executeUpdate();
if(count>0){
System.out.println("student updated");
transaction.commit();
session.close();
return true;
}
}
return false;
}
public Student viewStudent(int roll) {
System.out.println("finding student :"+roll);
if(session==null || !session.isOpen())
session=((DBOperation)factory.getBean("con")).getConnection();
if(session!=null && session.isOpen()){
Student student=(Student)session.get(Student.class, roll);
if(student!=null){
System.out.println("student found");
return student;
}
}
return null;
}
public boolean deleteStudent(int roll) {
if(session==null || !session.isOpen())
session=((DBOperation)factory.getBean("con")).getConnection();
if(session!=null && session.isOpen()){
transaction=session.beginTransaction();
Query query=session.createQuery("delete from Student where id=?");
query.setParameter(0, roll);
int count=query.executeUpdate();
if(count>0){
System.out.println("student deleted");
transaction.commit();
session.close();
return true;
}
}
return false;
}
}
的hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/spring</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<mapping resource="mapping/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
student.hibernate.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="std" class="com.student.bean.Student">
<property name="rollNo" value=""></property>
<property name="name" value=""></property>
<property name="address" value=""></property>
</bean>
<bean id="con" class="com.student.bean.DBOperation">
</bean>
</beans>
register.jsp
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<center>
<table>
<tr><td colspan="4"><center>Employee</center></td></tr>
<tr><td><a href="register.jsp">Register</a></td>
<td><a href="view.jsp">View</a></td>
<td><a href="update.jsp">Update</a></td>
<td><a href="delete.jsp">Delete</a></td>
</tr>
<tr><td colspan="4">
<center><br>
<%if(request.getParameter("status")!=null && request.getParameter("status").equals("sucess")){ %>
<font color="green">Student Registered successfully</font>
<%}else if(request.getParameter("status")!=null && request.getParameter("status").equals("fail")){ %>
<font color="red">Student not Registered </font>
<%} %>
<br>
<form action="Student.register" method="post">
<table>
<tr><td colspan="2"><center>Register Employee</center><br> <hr></td></tr>
<tr><td>Student Roll :</td><td><input type="text" name="roll" required="required"></td></tr>
<tr><td>Student Name :</td><td><input type="text" name="name" required="required"></td></tr>
<tr><td>Student Address :</td><td><input type="text" name="address" required="required"></td></tr>
<tr><td colspan="2"><center><input type="submit" value="Register"></center></td></tr>
</table>
</form>
</center>
</td></tr>
</table>
</center>
</body>
</html>
答案 0 :(得分：0)
抱怨mysql中不存在'spring'数据库。也许您必须在运行示例之前创建它。它来自这条线：
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/spring</property>
在你的hibernate.cfg.xml文件中。如果您有一个具有不同名称的数据库，则可以在那里进行更改。也许该示例带有一些您打算运行的脚本，它会创建并填充数据库。