如何解決在Tomcat上的持久性單元

Question

我在Glassfish上安裝了這個Web項目，但是由於出現了一些問題，我決定遷移到Tomcat。

但現在我的執着類拋出以下錯誤

Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named JetCarBd 

我試過把persistence.xml中的不同的文件夾，但都沒有奏效。

的persistence.xml

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://java.sun.com/xml/ns/persistence  http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> 
<persistence-unit name="JetCarBd" transaction-type="RESOURCE_LOCAL"> 
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> 
<class>br.com.jetcar.entity.Cliente</class> 
<class>br.com.jetcar.entity.Endereco</class> 
<class>br.com.jetcar.entity.Veiculo</class> 
<class>br.com.jetcar.entity.Aluguel</class> 
<class>br.com.jetcar.entity.Venda</class> 
<class>br.com.jetcar.entity.Interesse</class> 
<class>br.com.jetcar.entity.Funcionario</class> 
<class>br.com.jetcar.entity.ItensAluguel</class> 
<class>br.com.jetcar.entity.AcessorioAluguel</class> 
<class>br.com.jetcar.entity.TestDrive</class> 
<class>br.com.jetcar.entity.AcessorioVeiculo</class> 
<class>br.com.jetcar.entity.Acessorio</class> 
<class>br.com.jetcar.entity.Oficina</class> 
<class>br.com.jetcar.entity.Manutencao</class> 
<class>br.com.jetcar.entity.Reserva</class> 
<exclude-unlisted-classes>false</exclude-unlisted-classes> 
<properties> 
    <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/jetcar"/> 
    <property name="javax.persistence.jdbc.password" value="postgres"/> 
    <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/> 
    <property name="javax.persistence.jdbc.user" value="postgres"/> 
</properties> 
    </persistence-unit> 
</persistence> 

ConnectionUtil.java

package br.com.jetcar.connection; 

import javax.persistence.EntityManager; 
import javax.persistence.EntityManagerFactory; 
import javax.persistence.Persistence; 

/** 
* @author Jorge Oliveira 
*/ 
public class ConnectUtil { 

private final EntityManagerFactory emf; 

public ConnectUtil(){ 
    emf = Persistence.createEntityManagerFactory("JetCarBd"); 
} 

public EntityManager getEntityManager() { 
    return emf.createEntityManager(); 
} 


} 

我的persistence.xml坐落在src/META-INF

Answer 1

您可以檢查幾件事情在這裏：

1. 你哈哈VE部署你的應用確保的persistence.xml下

WEB-INF/classes/META-IN˚F文件夾，請

1. 你的提供商（日食JPA）罐子在classpath中，Eclipse的信封在構建路徑，並檢查是否這在部署的應用程序中可用。