{"id":128346,"date":"2024-03-25T06:01:12","date_gmt":"2024-03-24T21:01:12","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/jdbctemplate%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%81%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%92%e3%82%b9%e3%83%88%e3%83%aa%e3%83%bc%e3%83%9f%e3%83%b3%e3%82%b0\/"},"modified":"2024-04-04T12:49:47","modified_gmt":"2024-04-04T03:49:47","slug":"jdbctemplate%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%81%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%92%e3%82%b9%e3%83%88%e3%83%aa%e3%83%bc%e3%83%9f%e3%83%b3%e3%82%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/jdbctemplate%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%80%81%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%92%e3%82%b9%e3%83%88%e3%83%aa%e3%83%bc%e3%83%9f%e3%83%b3%e3%82%b0\/","title":{"rendered":"JdbcTemplate\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0(\u30ab\u30fc\u30bd\u30eb)\u3067\u8aad\u307f\u53d6\u308b"},"content":{"rendered":"<p>JdbcTemplate\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\uff08\u30ab\u30fc\u30bd\u30eb\uff09fetch\u306f\u3001fetchSize\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002fetchSize\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u4e00\u5ea6\u306b\u53d6\u5f97\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u6570\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">JdbcTemplateExample<\/span> {\r\n<span class=\"hljs-keyword\">private<\/span> JdbcTemplate jdbcTemplate;\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">JdbcTemplateExample<\/span><span class=\"hljs-params\">(DataSource dataSource)<\/span> {\r\n<span class=\"hljs-built_in\">this<\/span>.jdbcTemplate = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JdbcTemplate<\/span>(dataSource);\r\n}\r\n<span class=\"hljs-keyword\">public<\/span> List&lt;User&gt; <span class=\"hljs-title function_\">getUsers<\/span><span class=\"hljs-params\">()<\/span> {\r\n<span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">sql<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"SELECT * FROM users\"<\/span>;\r\nList&lt;User&gt; userList = jdbcTemplate.query(sql, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">RowMapper<\/span>&lt;User&gt;() {\r\n<span class=\"hljs-meta\">@Override<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> User <span class=\"hljs-title function_\">mapRow<\/span><span class=\"hljs-params\">(ResultSet rs, <span class=\"hljs-type\">int<\/span> rowNum)<\/span> <span class=\"hljs-keyword\">throws<\/span> SQLException {\r\n<span class=\"hljs-type\">User<\/span> <span class=\"hljs-variable\">user<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">User<\/span>();\r\nuser.setId(rs.getInt(<span class=\"hljs-string\">\"id\"<\/span>));\r\nuser.setName(rs.getString(<span class=\"hljs-string\">\"name\"<\/span>));\r\nuser.setAge(rs.getInt(<span class=\"hljs-string\">\"age\"<\/span>));\r\n<span class=\"hljs-keyword\">return<\/span> user;\r\n}\r\n});\r\n<span class=\"hljs-keyword\">return<\/span> userList;\r\n}\r\n<span class=\"hljs-keyword\">public<\/span> Stream&lt;User&gt; <span class=\"hljs-title function_\">getUsersAsStream<\/span><span class=\"hljs-params\">()<\/span> {\r\n<span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">sql<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"SELECT * FROM users\"<\/span>;\r\njdbcTemplate.setFetchSize(<span class=\"hljs-number\">1000<\/span>);\r\njdbcTemplate.query(sql, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ResultSetExtractor<\/span>&lt;Stream&lt;User&gt;&gt;() {\r\n<span class=\"hljs-meta\">@Override<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> Stream&lt;User&gt; <span class=\"hljs-title function_\">extractData<\/span><span class=\"hljs-params\">(ResultSet rs)<\/span> <span class=\"hljs-keyword\">throws<\/span> SQLException, DataAccessException {\r\n<span class=\"hljs-keyword\">return<\/span> StreamSupport.stream(\r\nSpliterators.spliteratorUnknownSize(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ResultSetIterator<\/span>(rs), Spliterator.ORDERED),\r\n<span class=\"hljs-literal\">false<\/span>);\r\n}\r\n});\r\n}\r\n}\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ResultSetIterator<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">Iterator<\/span>&lt;User&gt; {\r\n<span class=\"hljs-keyword\">private<\/span> ResultSet rs;\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">ResultSetIterator<\/span><span class=\"hljs-params\">(ResultSet rs)<\/span> {\r\n<span class=\"hljs-built_in\">this<\/span>.rs = rs;\r\n}\r\n<span class=\"hljs-meta\">@Override<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">boolean<\/span> <span class=\"hljs-title function_\">hasNext<\/span><span class=\"hljs-params\">()<\/span> {\r\n<span class=\"hljs-keyword\">try<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> rs.next();\r\n} <span class=\"hljs-keyword\">catch<\/span> (SQLException e) {\r\n<span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">RuntimeException<\/span>(e);\r\n}\r\n}\r\n<span class=\"hljs-meta\">@Override<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> User <span class=\"hljs-title function_\">next<\/span><span class=\"hljs-params\">()<\/span> {\r\n<span class=\"hljs-keyword\">try<\/span> {\r\n<span class=\"hljs-type\">User<\/span> <span class=\"hljs-variable\">user<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">User<\/span>();\r\nuser.setId(rs.getInt(<span class=\"hljs-string\">\"id\"<\/span>));\r\nuser.setName(rs.getString(<span class=\"hljs-string\">\"name\"<\/span>));\r\nuser.setAge(rs.getInt(<span class=\"hljs-string\">\"age\"<\/span>));\r\n<span class=\"hljs-keyword\">return<\/span> user;\r\n} <span class=\"hljs-keyword\">catch<\/span> (SQLException e) {\r\n<span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">RuntimeException<\/span>(e);\r\n}\r\n}\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001getUsers\u30e1\u30bd\u30c3\u30c9\u306f\u666e\u901a\u306eJdbcTemplate\u30af\u30a8\u30ea\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u7d50\u679c\u3092List\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3057\u3066\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u306b\u5bfe\u3057\u3066\u3001getUsersAsStream\u30e1\u30bd\u30c3\u30c9\u306fResultSetExtractor\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u7d50\u679c\u3092Stream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3057\u3066\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002ResultSetExtractor\u3067\u306f\u3001ResultSetIterator\u3092spliteratorUnknownSize\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u3067\u3001ResultSet\u3092Stream\u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002ResultSetIterator\u306fIterator\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u304a\u308a\u3001Stream\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b9\u30c8\u30ea\u30fc\u30e0\u3067DB\u3092\u53c2\u7167\u3059\u308b\u969b\u306b\u306f\u3001fetchSize\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3001\u4e00\u5ea6\u306b\u53d6\u5f97\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u6570\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u5c0f\u3055\u3044fetchSize\u306f\u30e1\u30e2\u30ea\u306e\u6d88\u8cbb\u3092\u6291\u3048\u307e\u3059\u304c\u3001\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u56de\u6570\u3092\u5897\u3084\u3057\u307e\u3059\u3002\u5bfe\u3057\u3066\u3001\u5927\u304d\u306afetchSize\u306f\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u56de\u6570\u3092\u6e1b\u3089\u3057\u307e\u3059\u304c\u3001\u30e1\u30e2\u30ea\u306e\u6d88\u8cbb\u3092\u5897\u3084\u3057\u307e\u3059\u3002\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306afetchSize\u3092\u3054\u9078\u629e\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JdbcTemplate\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\uff08\u30ab\u30fc\u30bd\u30eb\uff09fetch\u306f\u3001fetchSize\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002fetchSize\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u4e00\u5ea6\u306b\u53d6\u5f97\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u6570\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-128346","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JdbcTemplate\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0(\u30ab\u30fc\u30bd\u30eb)\u3067\u8aad\u307f\u53d6\u308b - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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