在一个简单的 maven hibernate 项目中得到错误“java.lang.NoClassDefFoundError: org/hibernate/cfg/Mappings”
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/35981363/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
getting error "java.lang.NoClassDefFoundError: org/hibernate/cfg/Mappings" in a simple maven hibernate project
提问by HsnVahedi
I'm working on a project using maven, hibernate and mysql. This is my pom.xml:
我正在使用 maven、hibernate 和 mysql 开发一个项目。这是我的 pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.heroku.realstate</groupId>
<artifactId>realstate-database</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>1.0.2.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<version>4.3.2.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>3.2.0.Final</version>
</dependency>
</dependencies>
</project>
and here is my resources/hibernate.cfg.xml:
这是我的资源/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/$DATABASE_NAME
</property>
<property name="hibernate.connection.password">
$PASSWORD
</property>
<property name="hibernate.connection.username">
@USERNAME
</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="show_sql">
true
</property>
<property name="hbm2ddl.auto">
create
</property>
<mapping class="com.heroku.realstate.database.user.UserEntity"/>
<mapping class="com.heroku.realstate.database.user.ClientEntity"/>
<mapping class="com.heroku.realstate.database.user.BotEntity"/>
<mapping class="com.heroku.realstate.database.sms.SmsEntity"/>
</session-factory>
</hibernate-configuration>
I have installed mysql and created a database named $DATABASE_NAME but I haven't created any table in database (because I'm not expert in sql and I hope hibernate can do it for people like me!). This is the way I'm using hibernate:
我已经安装了 mysql 并创建了一个名为 $DATABASE_NAME 的数据库，但我还没有在数据库中创建任何表（因为我不是 sql 专家，我希望 hibernate 可以为像我这样的人做到这一点！）。这是我使用休眠的方式：
class HibernateUtils {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
// Create the SessionFactory from hibernate.cfg.xml
return new AnnotationConfiguration().configure(new File("hibernate.cfg.xml")).buildSessionFactory();
}
static SessionFactory getSessionFactory() {
return sessionFactory;
}
static void shutdown() {
// Close caches and connection pools
getSessionFactory().close();
}
I build this project by maven and it successfully builds. But when I run the application JVM gives me error: java.lang.NoClassDefFoundError: org/hibernate/cfg/Mappings in this line:
我通过 maven 构建了这个项目，它成功构建了。但是当我运行应用程序时，JVM 给了我错误：java.lang.NoClassDefFoundError: org/hibernate/cfg/Mappings 在这一行：
return new AnnotationConfiguration().configure(new File("hibernate.cgf.xml")).buildSessionFactory();
What is the problem? How should I fix it? And Thanks!
问题是什么？我该如何解决？谢谢！
回答by v.ladynev
The problem with libraries. You use Hibernate 5. So you don't need this in the pom.xml
图书馆的问题。你使用 Hibernate 5。所以你不需要这个pom.xml
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>1.0.2.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>3.2.0.Final</version>
</dependency>
Hibernate 5 uses hibernate-commons-annotations-5.0.1.Final.jarand you don't need to specify it. Because of, it is a transitive dependency.
Hibernate 5 使用hibernate-commons-annotations-5.0.1.Final.jar，您不需要指定它。因为，它是一个传递依赖。
You don't need it too, because of you don't use JPA
你也不需要它，因为你不使用 JPA
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
There is not AnnotationConfigurationin Hibernate 4 and Hibernate 5. It is form Hibernate 3! Don't know where you get it.
AnnotationConfigurationHibernate 4和Hibernate 5中没有。它是Hibernate 3的形式！不知道你从哪里得到的。
To configure Hibernate 5
配置休眠 5
private static SessionFactory buildSessionFactory() {
return new Configuration().configure().buildSessionFactory();
}
回答by Abdelhak
Try to replace this line:
尝试替换此行：
return new AnnotationConfiguration().configure(new File("hibernate.cgf.xml")).buildSessionFactory();
With:
和：
return new Configuration().configure().buildSessionFactory();
Because Deprecated. Use the mappings and properties specified in the given application file.
因为Deprecated。使用给定应用程序文件中指定的映射和属性。
For more info go to AnnotationConfiguration
有关更多信息，请访问AnnotationConfiguration
回答by ArifMustafa
If you are using Hibernateabove version 3 like builds 4 or 5, simply use Configurationinstead of AnnotationConfigurationclass because AnnotationConfigurationis removed after version 3.
如果您使用Hibernate版本 3 以上的版本，例如 builds 4 或 5，只需使用Configuration而不是AnnotationConfiguration类，因为AnnotationConfiguration在版本 3 之后被删除。
Lets have a snapshot example with 11 dependencies and configuration to use Annotation based mapping configuration.
让我们有一个包含 11 个依赖项和配置的快照示例，以使用基于注解的映射配置。
1. antlr-2.7.7.jar
2. classmate-1.3.0.jar
3. dom4j-1.6.1.jar
4. geronimo-jta_1.1_spec-1.1.1.jar
5. hibernate-commons-annotations-5.0.1.Final.jar
6. hibernate-core-5.1.10.Final.jar
7. hibernate-jpa-2.1-api-1.0.0.Final.jar
8. jandex-2.0.3.Final.jar
9. javassist-3.20.0-GA.jar
10. jboss-logging-3.3.0.Final.jar
11. mysql-connector-java-5.1.38-bin.jar
Configuration file is as follows:
配置文件如下：
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver.class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://zampylob:3306/hibernatedb</property>
<property name="hibernate.connection.username">hiberuser</property>
<property name="hibernate.connection.password">XXXXXXXXXX</property>
<property name="hibernate.connection.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.show_sql">true</property>
<property name="hibernate.connection.format_sql">true</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<mapping class="com.whodesire.model.Student" />
</session-factory>
</hibernate-configuration>
Student POJO class is:
学生POJO类是：
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Student {
@Id
private Integer rollNo;
private String firstName;
private String middleName;
private String lastName;
private Date dateOfBirth;
private String gender;
public Integer getRollNo() {
return rollNo;
}
public void setRollNo(Integer rollNo) {
this.rollNo = rollNo;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getMiddleName() {
return middleName;
}
public void setMiddleName(String middleName) {
this.middleName = middleName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Date getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(Date dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
}
and finally the Main Class is :
最后主类是：
SessionFactory factory = new Configuration().configure("resources/hibernate.cfg.xml").buildSessionFactory();
Session session = factory.openSession();
Transaction transaction = session.beginTransaction();
Student student = new Student();
student.setRollNo(1002);
student.setFirstName("Maaherin");
student.setMiddleName("Zubbair");
student.setLastName("Gulfam");
student.setDateOfBirth(new Date());
student.setGender("Male");
session.persist(student);
transaction.commit();
session.close();
