当我尝试在Tomcat 7上运行我的JSF应用程序时，它将引发此异常。

Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.getConnection(DriverManagerConnectionProviderImpl.java:192)
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:278)
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:297)
... 51 more

如果我在创建EntitiyManagerFactory之前添加此行，则可以正常工作。

Class.forName("com.mysql.jdbc.Driver");
emf = Persistence.createEntityManagerFactory("manager1");

我的依赖是

<dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.1.2.Final</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.19</version>
    </dependency>

我的应用程序也可以正常运行tomcat 6，而无需添加 Class.forName("com.mysql.jdbc.Driver");

有解决这个问题的主意吗？谢谢