Lettura delle righe (HBase)
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Esempio di codice
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[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis code sample demonstrates how to read multiple rows from a Bigtable table using the Java client library.\u003c/p\u003e\n"],["\u003cp\u003eThe process involves initializing a connection to Bigtable, specifying the table, and creating a list of \u003ccode\u003eGet\u003c/code\u003e objects, each representing a row key to retrieve.\u003c/p\u003e\n"],["\u003cp\u003eThe code then executes the retrieval of the requested rows, and iterates through the results to print them individually.\u003c/p\u003e\n"],["\u003cp\u003eThe necessary credentials must be set up for the local development environment for successful authentication.\u003c/p\u003e\n"],["\u003cp\u003eFor more information about the bigtable library, you can use the references found within this document.\u003c/p\u003e\n"]]],[],null,["# Read rows (HBase)\n\nReads multiple rows.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Read examples](/bigtable/docs/reading-data)\n\nCode sample\n-----------\n\n### Java\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, 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 /**\n * Example of reading multiple row keys.\n */\n public static void readRows() {\n // TODO(developer): Replace these variables before running the sample.\n String projectId = \"my-project-id\";\n String instanceId = \"my-instance-id\";\n String tableId = \"mobile-time-series\";\n readRows(projectId, instanceId, tableId);\n }\n\n public static void readRows(String projectId, String instanceId, String tableId) {\n // Initialize client that will be used to send requests. This client only needs to be created\n // once, and can be reused for multiple requests.\n try (Connection connection = BigtableConfiguration.connect(projectId, instanceId)) {\n Table table = connection.getTable(TableName.valueOf(tableId));\n List\u003cGet\u003e queryRowList = new ArrayList\u003cGet\u003e();\n queryRowList.add(new Get(Bytes.toBytes(\"phone#4c410523#20190501\")));\n queryRowList.add(new Get(Bytes.toBytes(\"phone#4c410523#20190502\")));\n\n Result[] rows = table.get(queryRowList);\n\n for (Result row : rows) {\n printRow(row);\n }\n } catch (IOException e) {\n System.out.println(\n \"Unable to initialize service client, as a network error occurred: \\n\" + e.toString());\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=bigtable)."]]