java.lang.IllegalStateException:无法加载 JDBC 驱动程序类 [com.mysql.jdbc.GoogleDriver] [英] java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.GoogleDriver]

问题描述

我正在尝试将我的数据库从 Google 灵活环境连接到 Google Cloud SQL.连接字符串和驱动程序类如下所示:

I am trying to connect to my database from the Google Flexible Environment to the Google Cloud SQL. The connection string and the driver class are shown below:

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.GoogleDriver" />
    <property name="url" value="jdbc:google:mysql://mz-test:us-central1:mz-life-cloudsql-prod/mz_db" />
    <property name="username" value="root" />
    <property name="password" value="" />
</bean>

但是，我目前得到

org.springframework.beans.factory.BeanCreationException: 
    Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/classes/context/applicationContext-jooq.xml]: 
            Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; 
            nested PropertyAccessExceptions (1) are:|PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; 
            nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.GoogleDriver]

我尝试连接的数据库是第二代 Cloud SQL MySQL 数据库.

The database I am trying connecting to is a Second Generation Cloud SQL MySQL database.

为什么我会收到此异常?

Why am I getting this exception?

App Engine 具有此 属性.我还没有看到灵活环境的这个属性 - 至少在我目前阅读的那些页面上没有看到.是否需要在 app.yaml 文件中添加任何内容?

The App Engine had this <use-google-connector-j> property. I've not seen this property for the Flexible Environment - at least not on those pages what I've been reading so far. Is there anything I'd have to set in addtion in my app.yaml file?

不确定是否必须在灵活环境中执行此操作，但我目前正尝试在我的 yaml 文件中将 use-google-connector-j 属性设置为 true:

Not sure if I have to do this in Flexible Environment but I am currently trying to set the use-google-connector-j property to true in my yaml file:

use-google-connector-j: true

但目前看来这不起作用:https://code.google.com/p/googleappengine/issues/detail?id=11444

but it appears this is not working at the moment: https://code.google.com/p/googleappengine/issues/detail?id=11444

推荐答案

com.mysql.jdbc.GoogleDriver 旨在为 App Engine 标准环境应用程序工作.

com.mysql.jdbc.GoogleDriver is designed to work for App Engine Standard Environment applications.

对于在 App Engine 柔性环境应用程序上运行的 Java 应用程序，请使用 mysql-socket-工厂图书馆.

For Java applications running on App Engine Flexible Environment applications use the mysql-socket-factory library.

对于基于 Maven 的应用程序，添加对库的依赖:

For a Maven-based application, add a dependency on the library:

<dependency>
    <groupId>com.google.cloud.sql</groupId>
    <artifactId>mysql-socket-factory</artifactId>
    <version>1.0.1</version>
</dependency>

切换到标准/官方com.mysql.jdbc.Driver.连接字符串从

Switch to the standard/official com.mysql.jdbc.Driver. The connection string changes from

jdbc:google:mysql://instance_name/db_name

到

jdbc:mysql://google/db_name?cloudSqlInstance=<instance_connection_name>&socketFactory=com.google.cloud.sql.mysql.SocketFactory

的值可以在 Google Cloud Console 的 Cloud SQL 实例概览页面上找到.

The value for <instance_connection_name> can be found on the Cloud SQL instance overview page in Google Cloud Console.

注意:如果您在 XML 文件中指定连接字符串，您可能需要将诸如 & 之类的特殊字符转义为 &.

Note: If you are specifying the connection string in an XML file you might have to escape special characters like & to &.

注意:此方法不适用于mysql驱动(6及以上)的开发线.我不得不使用生产 5.1.39 版本.

Note: This method doesn't work with the development line of the mysql driver (6 and above). I had to use the production 5.1.39 version.

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