Java 连接到Google SQL时无法从数据源确定jdbc url

这有点奇怪

在过去的一周内，我已经能够连接到我在GCP中创建的测试数据库。我没有下载凭据，也没有使用cred配置更改任何内容。我只是更新了application.properties中的数据库源url

• 我仍然可以在本地连接，没有问题

这是相关的application.properties部分：

# ===============================
# = DATA SOURCE
# ===============================
# Set here configurations for the database connection
#spring.datasource.url=jdbc:mysql://localhost:3306/gametest
#gcp
#spring.datasource.url=jdbc:mysql://35.222.131.172:3306/gametest
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

今天，我尝试连接并接收此异常

    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_45]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_45]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_45]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_45]
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2016) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_45]
    at

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链路故障
成功发送到服务器的最后一个数据包是0毫秒前的。驱动程序尚未从服务器收到任何数据包。
在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）~[na:1.8.0\u 45]
在sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:62）~[na:1.8.0\U 45]
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）~[na:1.8.045]
在java.lang.reflect.Constructor.newInstance（Constructor.java:422）~[na:1.8.0_45]
在com.mysql.jdbc.Util.handleNewInstance（Util.java:425）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.SQLError.createCommunicationsException（SQLError.java:990）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.MysqlIO.（MysqlIO.java:342）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.coreConnect（ConnectionImpl.java:2188）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.connectoneryOnly（ConnectionImpl.java:2221）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.createNewIO（ConnectionImpl.java:2016）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.（ConnectionImpl.java:776）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.JDBC4Connection.（JDBC4Connection.java:47）~[mysql-connector-java-5.1.46.jar:5.1.46]
在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）~[na:1.8.0\u 45]
在

我查过： -我可以使用云终端连接到谷歌数据库

-数据库已启动并运行

-没有防火墙等

-应用程序没有发生任何戏剧性的变化（添加了存储方法，没有其他）

• 我尝试在连接之前使用终端将我的IP列入白名单
• 我检查了云日志，它正在启动、运行并等待连接
• 我没有滥发连接，所以那里不应该有问题
• 仔细检查pom.xml以确保JDBC仍然存在
• 对属性和pom进行比较，以检查是否存在不可靠的内容

以下是一些SO帖子，我发现有人建议这是正确的方法：

spring.datasource.url=jdbc:mysql://google/<DBNAME>?cloudSqlInstance=<MYDABINSTANCENAME>&socketFactory=com.google.cloud.sql.mysql.SocketFactory

spring.datasource.url=jdbc:mysql://google/?cloudSqlInstance=&socketFactory=com.google.cloud.sql.mysql.SocketFactory

我在中添加了这一点，现在收到另一个指向API凭据的异常

    Caused by: java.lang.RuntimeException: Unable to obtain credentials to communicate with the Cloud SQL API
    at com.google.cloud.sql.mysql.SslSocketFactory$ApplicationDefaultCredentialFactory.create(SslSocketFactory.java:545) ~[mysql-socket-factory-1.0.0.jar:na]
    at com.google.cloud.sql.mysql.SslSocketFactory.getInstance(SslSocketFactory.java:138) ~[mysql-socket-factory-1.0.0.jar:na]
    at com.google.cloud.sql.mysql.SocketFactory.connect(SocketFactory.java:47) ~[mysql-socket-factory-1.0.0.jar:na]
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221) ~[mysql-connector-java-5.1.46.jar:5.1.46]
    ... 61 common frames omitted
Caused by: java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
    at com.google.api.client.googleapis.auth.oauth2.DefaultCredentialProvider.getDefaultCredential(DefaultCredentialProvider.java:95) ~[google-api-client-1.21.0.jar:1.21.0]
    at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault(GoogleCredential.java:213) ~[google-api-client-1.21.0.jar:1.21.0]
    at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault(GoogleCredential.java:191) ~[google-api-client-1.21.0.jar:1.21.0]
    at com.google.cloud.sql.mysql.SslSocketFactory$ApplicationDefaultCredentialFactory.create(SslSocketFactory.java:543) ~[mysql-socket-factory-1.0.0.jar:na]
    ... 66 common frames omitted

原因：java.lang.RuntimeException:无法获取与云SQL API通信的凭据
在com.google.cloud.sql.mysql.SslSocketFactory$ApplicationDefaultCredentialFactory.create（SslSocketFactory.java:545）~[mysql-socket-factory-1.0.0.jar:na]
在com.google.cloud.sql.mysql.SslSocketFactory.getInstance（SslSocketFactory.java:138）~[mysql-socket-factory-1.0.0.jar:na]
在com.google.cloud.sql.mysql.SocketFactory.connect（SocketFactory.java:47）~[mysql-socket-factory-1.0.0.jar:na]
在com.mysql.jdbc.MysqlIO.（MysqlIO.java:301）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.coreConnect（ConnectionImpl.java:2188）~[mysql-connector-java-5.1.46.jar:5.1.46]
在com.mysql.jdbc.ConnectionImpl.connectoneryOnly（ConnectionImpl.java:2221）~[mysql-connector-java-5.1.46.jar:5.1.46]
... 省略了61个公共帧
原因：java.io.IOException:应用程序默认凭据不可用。如果在谷歌计算引擎中运行，它们是可用的。否则，必须定义指向定义凭据的文件的环境变量GOOGLE\u APPLICATION\u CREDENTIALS。看见https://developers.google.com/accounts/docs/application-default-credentials 了解更多信息。
在com.google.api.client.googleapis.auth.oauth2.DefaultCredentialProvider.getDefaultCredential（DefaultCredentialProvider.java:95）~[google-api-client-1.21.0.jar:1.21.0]
在com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault（GoogleCredential.java:213）~[google-api-client-1.21.0.jar:1.21.0]
在com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault（GoogleCredential.java:191）~[google-api-client-1.21.0.jar:1.21.0]
在com.google.cloud.sql.mysql.SslSocketFactory$ApplicationDefaultCredentialFactory.create（SslSocketFactory.java:543）~[mysql-socket-factory-1.0.0.jar:na]
... 省略66个公共框架

所以，我的问题是——有人知道为什么它以前有效，为什么现在无效吗？我是否需要凭据文件才能工作？如果需要，上次我是如何轻松连接的？在我发布的这两种方法中，有谁能告诉我，在不必为了连接到数据库而跳过太多的障碍的情况下，定义数据源的最佳方法是什么

---

提前谢谢

我会删除这个，但它可能会帮助其他人

我的IP不是静态的，在SQL实例的连接页面上，我的IP是一个授权的公共IP。这是我的家庭IP，但后来发生了变化

唉