EJB與Hibernate Provider無法創建表

Question

我想讓我的JavaEE容器自動創建或更新表。我有一個EJB項目和我使用MySQL的Dbms。我的應用程序服務器是Glassfish。我使用Hibernate作爲提供者。但沒有創建的表。如果我手動創建表，所有工作正常（堅持，合併，刪除）。這是我的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="AVS-WEB" transaction-type="JTA"> 
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 
    <jta-data-source>jdbc/__avs</jta-data-source> 

    <properties> 
     <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" /> 
     <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/avs" /> 
     <property name="javax.persistence.jdbc.user" value="*****" /> 
     <property name="javax.persistence.jdbc.password" value="******" /> 

     <!--Hibernate properties --> 
     <property name="hibernate.show_sql" value="true" /> 
     <property name="hibernate.format_sql" value="true" /> 
     <property name="hibernate.hbm2ddl.auto" value="update" /> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" /> 

    </properties> 

</persistence-unit> 
</persistence> 

這是我的例外，如果沒有可用的表。

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：在首先要做的表 'avs.kunde' 不存在

這裏是我的類昆德

package de.abs.ejb.bean; 

import java.io.Serializable; 

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

@Entity 
@Table(name="kunde") 
public class Kunde implements Serializable { 

private static final long serialVersionUID = 1L; 

@Id 
@SequenceGenerator(
     name="KUNDE_ID_GENERATOR", 
     sequenceName="AVS_KUNDE", 
     schema="AVS", 
     allocationSize=1, 
     initialValue=1) 
     @GeneratedValue(
     strategy=GenerationType.SEQUENCE, 
     generator="KUNDE_ID_GENERATOR") 
private Long id; 

private String email; 
private Long kundennummer; 

public Long getId() { 
    return id; 
} 

public void setId(Long id) { 
    this.id = id; 
} 

public String getEmail() { 
    return email; 
} 

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

public Long getKundennummer() { 
    return kundennummer; 
} 

public void setKundennummer(Long kundennummer) { 
    this.kundennummer = kundennummer; 
} 


} 

Answer 1

嘗試是修改update到create在這條線在你的文件persistence.xml：

<property name="hibernate.hbm2ddl.auto" value="create" /> 

釷在數據庫中創建表時，可以將其更改爲更新。