java - 不支持的操作异常 : The application must supply JDBC connections JPA Hibernate Spring JDBC

Question

当我尝试开始交易时

entityManager.getTransaction().begin();

在 AbstractDao 中，我得到

java.lang.UnsupportedOperationException: The application must supply JDBC connections

我的persistence.xml

<persistence 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"
         version="2.0">
<persistence-unit name="pu" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        <property name="hibernate.hbm2ddl.auto" value = "create-drop"/>
    </properties>
</persistence-unit>
</persistence>

我的 hibernate 属性

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ewp?createIfNotExist=true
jdbc.username=root
jdbc.password=root
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.show_sql=true
hibernate.format_sql=false
hibernate.hbm2ddl.auto=create-drop

EntityManagerFactory bean :

    @Bean
public EntityManagerFactory entityManagerFactory(){
    EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("pu");
    return entityManagerFactory;
}

实体管理器 bean:

@Bean
public EntityManager entityManager(){
    return entityManagerFactory.createEntityManager();
}

Answer 1

来自 hibernate site ，您的属性名称看起来不正确。应该是，

"hibernate.connection.driver_class" for JDBC driver class
"hibernate.connection.url" for JDBC URL
"hibernate.connection.username" for database user
"hibernate.connection.password" for database user password

更正您的属性名称。