Wy私はJPAとデータベースを接続できませんか？

Question

UserEntity：

package model.entity; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 

@Entity 
@Table 
public class UserEntity { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO)  
    private int eid; 

    private String username; 
    private String password; 
    private String email; 
    private String function; 

    public UserEntity(int eid, String username, String password, String email, String function){ 
     this.eid = eid; 
     this.username = username; 
     this.password = password; 
     this.email = email; 
     this.function = function; 
    } 

    public UserEntity(){ 
     super(); 
    } 

    public String getUsername() { 
     return username; 
    } 

    public void setUsername(String username) { 
     this.username = username; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    public String getFunction() { 
     return function; 
    } 

    public void setFunction(String function) { 
     this.function = function; 
    } 

    public int getEid() { 
     return eid; 
    } 

    public void setEid(int eid) { 
     this.eid = eid; 
    } 

} 

との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="FastFoodJSF" transaction-type="RESOURCE_LOCAL"> 

    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> 
    <class>model.entity.UserEntity</class> 

    <properties> 

     <property name="javax.persistance.jdbc.url" value="jdbc:mysql://localhost:3306/fastfood" /> 
     <property name="javax.persistance.jdbc.user" value="fastfoodadmin" /> 
     <property name="javax.persistance.jdbc.password" value="fastfood" /> 
     <property name="javax.persistance.jdbc.driver" value="com.mysql.jdbc.Driver" /> 

    </properties> 

    </persistence-unit> 
</persistence> 

これはエラーアン示しています

[EL Info]: 2017-04-05 12:17:38.926--ServerSession(2006034581)--EclipseLink, version: Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd 
[EL Severe]: ejb: 2017-04-05 12:17:38.934--ServerSession(2006034581)--Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException 
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform 
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException 
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:766) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:204) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:304) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:336) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:302) 
    at model.service.FindUsers.main(FindUsers.java:13) 
Caused by: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException 
Exception Description: Unable to acquire a connection from driver [null], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform 
    at org.eclipse.persistence.exceptions.DatabaseException.unableToAcquireConnectionFromDriverException(DatabaseException.java:383) 
    at org.eclipse.persistence.sessions.DefaultConnector.connect(DefaultConnector.java:91) 
    at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.setOrDetectDatasource(DatabaseSessionImpl.java:204) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:741) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:239) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:685) 
    ... 5 more 

それはそれが表示されていないbecouseそれがデータベースに接続傾けるように私には見えます永続性からのプロパティー？ 私はこの技術の新人であり、JPAがどのように動作すべきか理解できません。

Answer 1

:) おかげで、あなたはjavax.persist nce.jdbcを交換してみてください。* javax.persist 電子 nce.jdbcで。*？