Membuat koneksi TCP menggunakan Java
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Buka koneksi TCP ke Cloud SQL untuk PostgreSQL dengan menggunakan Java.
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Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[],[],null,["# Create a TCP connection by using Java\n\nOpen a TCP connection to Cloud SQL for PostgreSQL by using Java.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Connect from App Engine flexible environment](/sql/docs/postgres/connect-app-engine-flexible)\n- [Connect from App Engine standard environment](/sql/docs/postgres/connect-app-engine-standard)\n- [Connect from Cloud Build](/sql/docs/postgres/connect-build)\n- [Connect from Cloud Run](/sql/docs/postgres/connect-run)\n- [Connect from Cloud Run functions](/sql/docs/postgres/connect-functions)\n- [Connect using the Cloud SQL Auth Proxy](/sql/docs/postgres/connect-auth-proxy)\n- [Manage database connections](/sql/docs/postgres/manage-connections)\n\nCode sample\n-----------\n\n### Java\n\n\nTo authenticate to Cloud SQL for PostgreSQL, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n\n import com.zaxxer.hikari.HikariConfig;\n import com.zaxxer.hikari.HikariDataSource;\n import javax.sql.DataSource;\n\n public class TcpConnectionPoolFactory extends ConnectionPoolFactory {\n\n // Note: Saving credentials in environment variables is convenient, but not\n // secure - consider a more secure solution such as\n // Cloud Secret Manager (https://cloud.google.com/secret-manager) to help\n // keep secrets safe.\n private static final String DB_USER = System.getenv(\"DB_USER\");\n private static final String DB_PASS = System.getenv(\"DB_PASS\");\n private static final String DB_NAME = System.getenv(\"DB_NAME\");\n\n private static final String INSTANCE_HOST = System.getenv(\"INSTANCE_HOST\");\n private static final String DB_PORT = System.getenv(\"DB_PORT\");\n\n\n public static DataSource createConnectionPool() {\n // The configuration object specifies behaviors for the connection pool.\n HikariConfig config = new HikariConfig();\n\n // The following URL is equivalent to setting the config options below:\n // jdbc:postgresql://\u003cINSTANCE_HOST\u003e:\u003cDB_PORT\u003e/\u003cDB_NAME\u003e?user=\u003cDB_USER\u003e&password=\u003cDB_PASS\u003e\n // See the link below for more info on building a JDBC URL for the Cloud SQL JDBC Socket Factory\n // https://github.com/GoogleCloudPlatform/cloud-sql-jdbc-socket-factory#creating-the-jdbc-url\n\n // Configure which instance and what database user to connect with.\n config.setJdbcUrl(String.format(\"jdbc:postgresql://%s:%s/%s\", INSTANCE_HOST, DB_PORT, DB_NAME));\n config.setUsername(DB_USER); // e.g. \"root\", \"postgres\"\n config.setPassword(DB_PASS); // e.g. \"my-password\"\n\n\n // ... Specify additional connection properties here.\n // ...\n\n // Initialize the connection pool using the configuration object.\n return new HikariDataSource(config);\n }\n }\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=cloud_sql_postgres)."]]