The driver has not received any packets from the server.Īt 0(Native Method)Īt (Unknown Source)Īt (Unknown Source)Īt .newInstance(Unknown Source)Īt .handleNewInstance(Util.java:389)Īt .createCommunicationsException(SQLError.java:1038)Īt .(MysqlIO.java:338)Īt .coreConnect(ConnectionImpl.java:2237)Īt .connectOneTryOnly(ConnectionImpl.java:2270)Īt .createNewIO(ConnectionImpl.java:2069)Īt .(ConnectionImpl.java:794)Īt 4Connection.(JDBC4Connection.java:44)Īt .getInstance(ConnectionImpl.java:399)Īt .connect(NonRegisteringDriver.java:325)Īt (Unknown Source)Īt (UploadData.java:32)Ĭaused by: : Connection refused: connectĪt 0(Native Method)Īt (Unknown Source)Īt (Unknown Source)Īt (Unknown Source)Īt (Unknown Source)Īt (Unknown Source)Īt (Unknown Source)Īt (Unknown Source)Īt .connect(StandardSocketFactory.java:213)Īt .(MysqlIO. The last packet sent successfully to the server was 0 milliseconds ago. Ошибка, которую я получаю: Exception in thread "main" .jdbc4.CommunicationsException: Communications link failure #Mysql jdbc string passwordHere the user and password are both 'paulr'Ĭonnection c = DriverManager.getConnection(CONNECTION,p) Class.forName(xxx) loads the jdbc classes and Public static void main(String args) throws Private static final String dbClassName = "" The version number in the Jar file can be different. jdbc:mysql+srv: is for ordinary and basic failover JDBC connections that make use of DNS SRV records. In order to connect your java program with MySQL database, you need to include MySQL JDBC driver which is a JAR file, namely mysql-connector-java-5.1.49-bin.jar. According to JavaSofts overview, 'The JDBC API defines Java classes to represent database connections, SQL statements, result sets, database metadata, etc. What is JDBC JDBC (Java Database Connectivity) is a Java API developed by JavaSoft for executing SQL statements. See Section 9.4, Configuring Source/Replica Replication with Connector/J for details. For more information about MySQL visit the MySQL website. The Cloud SQL Auth proxy validates connections using credentials for a user or service account and wrapping the connection in a SSL/TLS layer that's authorized for a Cloud SQL instance. jdbc:mysql:replication: is for JDBC replication connections. Я установил mysql-server, mysql-client и libmysql-java в ubuntu, и выполнение sql-запросов внутри сервера ubuntu, похоже, работает нормально. The Cloud SQL Auth proxy lets you authorize and secure your connections by using Identity and Access Management (IAM) permissions.
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