javax.persistence.PersistenceException:没有名为aramis的EntityManager的持久性提供程序
我不熟悉JPA和Hibernate。我正在看教程,我做了视频中提到的每一件事,但我认为有些错误 我正在使用EclipseJavaEE。还有jpa、hibernate和MySQL 坚持:javax.persistence.PersistenceException:没有名为aramis的EntityManager的持久性提供程序,java,hibernate,jpa,persistence,Java,Hibernate,Jpa,Persistence,我不熟悉JPA和Hibernate。我正在看教程,我做了视频中提到的每一件事,但我认为有些错误 我正在使用EclipseJavaEE。还有jpa、hibernate和MySQL 坚持: <?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/2
<?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="aramis" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.webproject.web.entities.User</class>
<properties>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/webproject" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="mysql123" />
</properties>
</persistence-unit>
</persistence>
服务:
公共类用户服务{
private EntityManagerFactory emf = Persistence.createEntityManagerFactory("aramis");
private EntityManager em = emf.createEntityManager();
private EntityTransaction tx = em.getTransaction();
private Sha512 sha512 = new Sha512();
public int insert(User user) {
Date date = new Date();
user.setCreated_at(date);
user.setRole_type(0);
String password = user.getPassword();
password = sha512.encrypt(password);
user.setPassword(password);
tx.begin();
em.persist(user);
tx.commit();
em.close();
return user.getId();
}
它给出了一些错误:
javax.persistence.PersistenceException: No Persistence provider for EntityManager named aramis
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:61)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at com.webproject.web.services.UserService.<init>(UserService.java:19)
at com.webproject.web.servlet.Register.doPost(Register.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
javax.persistence.PersistenceException:没有名为aramis的EntityManager的持久性提供程序
位于javax.persistence.persistence.createEntityManagerFactory(persistence.java:61)
位于javax.persistence.persistence.createEntityManagerFactory(persistence.java:39)
位于com.webproject.web.services.UserService(UserService.java:19)
位于com.webproject.web.servlet.Register.doPost(Register.java:54)
位于javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
位于javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
还有我的路径:
当您调用
Persistence.createEntityManagerFactory(“aramis”)
时,默认情况下,它试图在名为META-INF
的文件夹中查找名为Persistence.xml
的文件
为了让它工作,您的类路径中应该有一个
META-INF/persistence.xml
。当您调用persistence.createEntityManagerFactory(“aramis”)
时,默认情况下,它试图在名为META-INF
的文件夹中找到一个名为persistence.xml
的文件
为了让它工作,你的类路径中应该有一个
META-INF/persistence.xml
。在你的评论之后,我检查了,我看到我在错误的目录中创建了没有jpa和persistence.xml的文件,所以thx.yea在你的评论之后,我检查了,我看到我在错误的目录中创建了没有jpa和persistence.xml的文件,所以谢谢。
javax.persistence.PersistenceException: No Persistence provider for EntityManager named aramis
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:61)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at com.webproject.web.services.UserService.<init>(UserService.java:19)
at com.webproject.web.servlet.Register.doPost(Register.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)