休眠 java.lang.NoClassDefFoundError: org/hibernate/util/DTDEntityResolver
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Hibernate java.lang.NoClassDefFoundError: org/hibernate/util/DTDEntityResolver
提问by Ivan
I'm very new to hibernate, and i'm simply trying to make my first program that use it.
我对休眠非常陌生，我只是想制作我的第一个使用它的程序。
I'm using maven for building the project. I declared these dependencies:
我正在使用 maven 来构建项目。我声明了这些依赖项：
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.1.5.SP1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.1.5.SP1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<version>3.2.4.GA</version>
</dependency>
Then i created the hibernate configuration file:
然后我创建了休眠配置文件：
<?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 name="">
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">******</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/vcsdb</property>
<property name="hibernate.connection.username">vcsuser</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping class="org.test.database.Project"/>
</session-factory
</hibernate-configuration>
Then i created a reverse enginering file:
然后我创建了一个逆向工程文件：
<?xml version="1.0" encoding="UTF-8"?>
Using eclipse hibernate plugin, i created the entity that represent the only table present in the database:
使用 eclipse hibernate 插件，我创建了代表数据库中唯一表的实体：
package org.test.database;
// Generated Jul 28, 2012 4:34:03 PM by Hibernate Tools 3.4.0.CR1
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
* Project generated by hbm2java
*/
@Entity
@Table(name = "project", catalog = "versioncontroldb")
public class Project implements java.io.Serializable {
private Integer id;
private String name;
private String longName;
private String siteUrl;
private String projectUrl;
private Date registered;
private String description;
private String userId;
public Project() {
}
public Project(String name, String projectUrl, Date registered) {
this.name = name;
this.projectUrl = projectUrl;
this.registered = registered;
}
public Project(String name, String longName, String siteUrl,
String projectUrl, Date registered, String description,
String userId) {
this.name = name;
this.longName = longName;
this.siteUrl = siteUrl;
this.projectUrl = projectUrl;
this.registered = registered;
this.description = description;
this.userId = userId;
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id", unique = true, nullable = false)
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
@Column(name = "name", nullable = false, length = 30)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "long_name", length = 65535)
public String getLongName() {
return this.longName;
}
public void setLongName(String longName) {
this.longName = longName;
}
@Column(name = "site_url", length = 150)
public String getSiteUrl() {
return this.siteUrl;
}
public void setSiteUrl(String siteUrl) {
this.siteUrl = siteUrl;
}
@Column(name = "project_url", nullable = false, length = 200)
public String getProjectUrl() {
return this.projectUrl;
}
public void setProjectUrl(String projectUrl) {
this.projectUrl = projectUrl;
}
@Temporal(TemporalType.DATE)
@Column(name = "registered", nullable = false, length = 10)
public Date getRegistered() {
return this.registered;
}
public void setRegistered(Date registered) {
this.registered = registered;
}
@Column(name = "description", length = 65535)
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
@Column(name = "user_id", length = 25)
public String getUserId() {
return this.userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
}
And finally i added into main servlet classs for the application the follwing line of code:
最后，我将以下代码行添加到应用程序的主要 servlet 类中：
Configuration sessionFactory = (Configuration) new Configuration()
.configure() // configures settings from hibernate.cfg.xml
.buildSessionFactory();
But when i try to launch the application i receive the following error message:
但是当我尝试启动应用程序时，我收到以下错误消息：
org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/util/DTDEntityResolver
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:839)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
and:
和：
java.lang.NoClassDefFoundError: org/hibernate/util/DTDEntityResolver
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:791)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2901)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
org.hibernate.cfg.Configuration.reset(Configuration.java:326)
org.hibernate.cfg.Configuration.<init>(Configuration.java:265)
org.hibernate.cfg.Configuration.<init>(Configuration.java:269)
org.versioncontrolanalyzer.controllers.MainController.helloWorld(MainController.java:18)
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:601)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
Any idea?
任何的想法？
回答by Ivan
Ok i found a solution myself.
好的，我自己找到了解决方案。
There was several errors. Firs in the pom i removed this dependency:
有几个错误。在 pom 中，我删除了这个依赖项：
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<version>3.2.4.GA</version>
Then i received another error: Cannot find hibernate.cfg.xml, i looked around and i found that this configuration file must be placed into root folder of java sources (so it will places onto classes folder when the application is deployed).
然后我收到另一个错误：找不到 hibernate.cfg.xml，我环顾四周，发现这个配置文件必须放在 java 源的根文件夹中（所以它会在部署应用程序时放在 classes 文件夹中）。
Finally i had another . of casting into declaration of sessionFactory, i declared it as Configuration variable, but it must be a SessionFactory Variable.
最后我有另一个。转换成 sessionFactory 的声明，我将它声明为配置变量，但它必须是一个 SessionFactory 变量。
Finally there is another problem with the mapping (wrong package for the Project class).
最后，映射还有另一个问题（Project 类的包错误）。
And it seems to works :)
它似乎有效:)
