我无法通过非常简单的代码让Hibernate在netbeans上使用H2数据库。请帮忙！我收到这个错误：
Testcase: initializationError(Teste): Caused an ERROR
org/hamcrest/SelfDescribing
java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
以下是文件的内容：
hibernate.cfg.xml中
<?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">org.h2.Driver</property>
<property name="hibernate.connection.url">jdbc:h2:./testeDB</property>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
</session-factory>
</hibernate-configuration>
的persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="HibernateAgoraVaiPU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>Pessoa</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
<property name="javax.persistence.jdbc.url" value="jdbc:h2:./testeDB"/>
<property name="javax.persistence.jdbc.user" value=""/>
<property name="javax.persistence.jdbc.password" value=""/>
<property name="dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
<property name="javax.persistence.schema-generation.database.action" value="create"/>
</properties>
</persistence-unit>
</persistence>
Pessoa.java
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
public class Pessoa implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
@Column(length=50, nullable=false)
private String nome;
@Temporal(TemporalType.DATE)
private Date aniversario;
public Pessoa(){
}
public Date getAniversario() {
return this.aniversario;
}
public void setAniversario(Date aniversario) {
this.aniversario = aniversario;
}
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNome() {
return this.nome;
}
public void setNome(String nome) {
this.nome = nome;
}
}
Teste.java
import java.util.Collection;
import java.util.Date;
import javax.persistence.EntityManager;
import javax.persistence.Persistence;
import org.junit.Test;
public class Teste {
private EntityManager em;
public Teste(){
this.em = Persistence.createEntityManagerFactory("TesteHibernatePU").createEntityManager();
}
@Test
public void inserir(){
// Instanciamos um objeto Pessoa, setando nome e data de nascimento
Pessoa p1 = new Pessoa();
p1.setNome("Jonnas Fonini");
p1.setAniversario(new Date());
Pessoa p2 = new Pessoa();
p2.setNome("Luana Fonini");
p2.setAniversario(new Date());
Pessoa p3 = new Pessoa();
p3.setNome("Fulano de Tal");
p3.setAniversario(new Date());
// Iniciamos a transação
em.getTransaction().begin();
// Aqui persistimos os objetos recém criados
em.persist(p1);
em.persist(p2);
em.persist(p3);
// E aqui efetuamos definitivamente a transação
em.getTransaction().commit();
}
@Test
public void listar(){
Collection <Pessoa> lista = em.createQuery("from Pessoa").getResultList();
for (Pessoa p : lista){
System.out.println(p.getId() + " – " + p.getNome() + " – " + p.getAniversario());
}
}
}
以下是我的步骤：
1）在NetBeans（版本8.1）
中创建了一个新项目2）在项目中添加了Hibernate库：右键单击库＆gt;添加库...＆gt;导入＆gt; Hibernate 4.3.x
3）从此链接下载最新稳定版H2 http://repo2.maven.org/maven2/com/h2database/h2/1.3.176/h2-1.3.176.jar并将jar添加为库：右键单击库＆gt;添加JAR /文件夹＆gt;选择下载的JAR文件
4）在“服务”选项卡中创建新的数据库连接：右键单击数据库＆gt;新连接...＆gt;选择新的驱动程序选项＆gt;挑选在步骤（3）下载的JAR文件＆gt; OK和Next>左用户名和密码为空，只是通知“jdbc：h2：./ testeDB”（没有引号）作为JDBC URL，并成功测试连接＆gt;选择PUBLIC SCHEMA和Finished
5）使用助手创建了一个新的Hibernate配置：右键单击“source-code packages”＆gt;新＆gt;其他＆gt; Hibernate＆gt;助手＆gt;接下来，选择在步骤（4）
上创建的连接6）创建一个新的持久性单元：右键单击“源代码包”＆gt;新＆gt;其他＆gt;持久性＆gt; <持久性单元>下一个＆gt;将持久性库更改为Hibernate JPA 2.1，将数据库连接更改为在步骤（4）中创建的连接，并将表策略更改为
之后我编辑了persistence.xml和hibernate.cfg.xml以使用org.hibernate.dialect.H2Dialect
最后我创建了一个简单的Person类和一些测试代码。还使用
授予项目文件夹的完全权限sudo chmod 777 -R HibernateAgoraVai
因为我可能是创建数据库文件的权限问题..
答案 0 :(得分：0)
我发现代码存在以下问题。虽然可以帮助任何人：
1）正如gauee所指出的那样，我应该将hamcrest-core-1.3.jar下载并添加到测试库中。
2）在createEntityManagerFactory调用中，我传递了“TesteHibernatePU”。这必须与persistence.xml中使用的名称相同，在本例中为“HibernateAgoraVaiPU”
3）另一个图书馆遗失了。似乎是JUnit 4.11及更高版本的依赖项。不得不下载jandex-1.1.0.Final.jar并将其添加到测试库中。
4）最后我不得不将Hibernate表策略创建从“Create”更改为“Drop and create”。我还是不明白为什么要做这个改变。