如何在heroku上配置hibernate ORM？ [英] How do I configure hibernate ORM on heroku?

问题描述

这是我在hibernate.cfg.xml中的

Here is what I have in hibernate.cfg.xml

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.hbm2ddl.auto">update</property>
        <property name="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</property>
        <property name="hibernate.connection.charSet">UTF-8</property> 
        <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
        <property name="connection.driver_class">org.postgresql.Driver</property>
        <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
        <property name="connection.pool_size">1</property>
        <property name="show_sql">true</property>
        <property name="hibernate.use_outer_join">true</property>
        <property name="current_session_context_class">thread</property>
    </session-factory>
</hibernate-configuration>

此外，我将动态覆盖某些属性...

Also, I am overriding some properties dynamically...

 Configuration config = new Configuration().configure("path_to_hibernate.cfg.xml");
 config.setProperty("hibernate.connection.url", System.getenv("HEROKU_POSTGRESQL_MYCOLOR_URL"));
 config.setProperty("hibernate.connection.username", "***");
 config.setProperty("hibernate.connection.password", "***");

但是，当我运行它，我得到这个错误...

But, when I run it, I get this error...

ERROR: No suitable driver found for postgres://*******:*********@ec2-23-21-85-197.compute-1.amazonaws.com:5432/d9i5vp******o7te

如何配置我的属性，让heroku找到postgres驱动程序？

How do I configure my properties so that heroku finds the postgres driver?

（我是新的hibernate和heroku，所以任何帮助非常感谢：）

(I am new to hibernate and heroku, so any help is greatly appreciated :)

推荐答案

来自Heroku Postgres的URL格式不是JDBC格式。它是一个多语言格式，所以所有平台都可以使用它。所以你需要将URL转换为JDBC格式。在Heroku开发中心有一个很好的例子：

https://devcenter.heroku.com/articles/connecting-to-relational-databases-on-heroku-with-java# use-the-in-plain-jdbc

The URL format that comes from Heroku Postgres is not the JDBC format. It is a polyglot format so that all platforms can use it. So you need to transform the URL to the JDBC format. There is a good example of how to do that on the Heroku Dev Center:
https://devcenter.heroku.com/articles/connecting-to-relational-databases-on-heroku-with-java#using-the-in-plain-jdbc

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