java.lang.NoClassDefFoundError: 无法初始化类 Hibernate.util.HibernateUtil
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java.lang.NoClassDefFoundError: Could not initialize class Hibernate.util.HibernateUtil
提问by St.Antario
The following is my HibernateUtil class:
以下是我的 HibernateUtil 类：
package Hibernate.util;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory from standard (hibernate.cfg.xml)
// config file.
sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
My controller:
我的控制器：
package Controllers;
import DAOImpl.ProductDAOImpl;
import Entities.Product;
import java.sql.SQLException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class ProductController {
@RequestMapping("/products.htm")
public String getAllProducts() throws SQLException
{
ProductDAOImpl mapping = new ProductDAOImpl();
Product p = new Product();
p.setCost(1000);
p.setName("Саморезы");
mapping.addProduct(p);
return "index";
}
}
But when I run web-app I have excpetion:
但是当我运行 web-app 时，我有异常：
java.lang.NoClassDefFoundError: Could not initialize class Hibernate.util.HibernateUtil
DAOImpl.ProductDAOImpl.addProduct(ProductDAOImpl.java:24)
Controllers.ProductController.getAllProducts(ProductController.java:20)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
Any Idea? Might HibernateUtil must be registered in any place?
任何的想法？是否必须在任何地方注册 HibernateUtil？
回答by Puneetsri
This class first of all must be on your classpath. And then make sure that ProductDAOImplge the sessionFactory(to eventually provide the session)via HibernateUtil.getSessionFactory().
这个类首先必须在你的类路径上。然后确保ProductDAOImplge the sessionFactory(to eventually provide the session)via HibernateUtil.getSessionFactory()。
You are anyway free to define this class as a bean in you application context if you like to do so.
无论如何，如果您愿意，您可以自由地将此类定义为应用程序上下文中的 bean。
回答by yakup_y
i think you don't have mysql-connector.jarin your Classpath
我想你没有mysql-connector.jar在你的Classpath
