从另一个项目ID访问现有的Cloud SQL实例

我已经在PHP项目中创建了一个云sql实例，并成功完成了计费过程.该项目有效.

I have created a cloud sql instance in a PHP project and have made the billing procedure successfully. The project works.

现在，我想从另一个项目访问数据库，但是这次是在带有servlet的Java SDK项目中.使用 https://developers.google.com/appengine/中的示例docs/java/cloud-sql/

Now, I want to access my database from another project but this time in Java SDK project with servlets. Using the example in https://developers.google.com/appengine/ docs/java/cloud-sql/

在Java项目中，我有:

In Java project I have:

在php项目ID中，我有:项目编号:phptestID实例名称:phpinstanceName

In php project id I have: project id: phptestID instance name: phpinstanceName

在Servlet的代码中，我进行以下连接:

In my code in Servlet i do the below connection:

String url = "jdbc:google:mysql://phptestID:phpinstanceName/dbname?user=root";
Connection conn = (Connection) DriverManager.getConnection(url);

(... >>此时连接失败，并且无法访问数据库以进行以下查询)

(...>> The connection fails in this point and doesn't access the database to make the below query )

String sqlStmt = "SELECT * FROM  sometable";
PreparedStatement  stmt = conn.prepareStatement(sqlStmt);
ResultSetres = stmt.executeQuery(sqlStmt);

如何在另一个项目中访问我的数据库?有没有其他办法your-project-id:您的实例名称???

How can I access my database in another project?? Is there any other way except your-project-id:your-instance-name???