{"id":101466,"date":"2024-03-22T04:00:07","date_gmt":"2024-03-21T19:00:07","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ae%e7%85%a7%e4%bc%9a%e3%81%a8%e8%a1%a8%e7%a4%ba%e3%82%92%e8%a1%8c%e3%81%86\/"},"modified":"2024-03-26T21:52:32","modified_gmt":"2024-03-26T12:52:32","slug":"java%e3%81%a7%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ae%e7%85%a7%e4%bc%9a%e3%81%a8%e8%a1%a8%e7%a4%ba%e3%82%92%e8%a1%8c%e3%81%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ae%e7%85%a7%e4%bc%9a%e3%81%a8%e8%a1%a8%e7%a4%ba%e3%82%92%e8%a1%8c%e3%81%86\/","title":{"rendered":"Java\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u7167\u4f1a\u3068\u8868\u793a\u3092\u884c\u3046"},"content":{"rendered":"<p>Java\u3067\u306f\u3001JDBC\uff08Java Database Connectivity\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u30af\u30a8\u30ea\u64cd\u4f5c\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066\u7d50\u679c\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">import\u00a0java.sql.*;\r\npublic\u00a0class\u00a0DatabaseQuery\u00a0{<\/pre>\n<p>public\u00a0static\u00a0void\u00a0main(String[]\u00a0args)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0JDBC\u8fde\u63a5\u7684\u6570\u636e\u5e93URL\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0url\u00a0=\u00a0\u201cjdbc:mysql:\/\/localhost:3306\/mydatabase\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0username\u00a0=\u00a0\u201croot\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0password\u00a0=\u00a0\u201cpassword\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u5b9a\u4e49\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61\u548c\u7ed3\u679c\u96c6\u5bf9\u8c61<\/p>\n<p>&nbsp;<\/p>\n<p>Connection\u00a0conn\u00a0=\u00a0null;<\/p>\n<p>&nbsp;<\/p>\n<p>Statement\u00a0stmt\u00a0=\u00a0null;<\/p>\n<p>&nbsp;<\/p>\n<p>ResultSet\u00a0rs\u00a0=\u00a0null;<\/p>\n<p>&nbsp;<\/p>\n<p>try\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u8fde\u63a5\u6570\u636e\u5e93<\/p>\n<p>&nbsp;<\/p>\n<p>conn\u00a0=\u00a0DriverManager.getConnection(url,\u00a0username,\u00a0password);<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u521b\u5efaStatement\u5bf9\u8c61<\/p>\n<p>&nbsp;<\/p>\n<p>stmt\u00a0=\u00a0conn.createStatement();<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u5b9a\u4e49\u67e5\u8be2\u8bed\u53e5<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0sql\u00a0=\u00a0\u201cSELECT\u00a0*\u00a0FROM\u00a0mytable\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u6267\u884c\u67e5\u8be2\u5e76\u83b7\u53d6\u7ed3\u679c\u96c6<\/p>\n<p>&nbsp;<\/p>\n<p>rs\u00a0=\u00a0stmt.executeQuery(sql);<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u904d\u5386\u7ed3\u679c\u96c6\u5e76\u663e\u793a\u67e5\u8be2\u7ed3\u679c<\/p>\n<p>&nbsp;<\/p>\n<p>while\u00a0(rs.next())\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>int\u00a0id\u00a0=\u00a0rs.getInt(\u201cid\u201d);<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0name\u00a0=\u00a0rs.getString(\u201cname\u201d);<\/p>\n<p>&nbsp;<\/p>\n<p>int\u00a0age\u00a0=\u00a0rs.getInt(\u201cage\u201d);<\/p>\n<p>&nbsp;<\/p>\n<p>System.out.println(&#8220;ID:\u00a0&#8221;\u00a0+\u00a0id\u00a0+\u00a0&#8220;,\u00a0Name:\u00a0&#8221;\u00a0+\u00a0name\u00a0+\u00a0&#8220;,\u00a0Age:\u00a0&#8221;\u00a0+\u00a0age);<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>}\u00a0catch\u00a0(SQLException\u00a0e)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>e.printStackTrace();<\/p>\n<p>&nbsp;<\/p>\n<p>}\u00a0finally\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>\/\/\u00a0\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u548c\u7ed3\u679c\u96c6<\/p>\n<p>&nbsp;<\/p>\n<p>try\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>if\u00a0(rs\u00a0!=\u00a0null)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>rs.close();<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>if\u00a0(stmt\u00a0!=\u00a0null)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>stmt.close();<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>if\u00a0(conn\u00a0!=\u00a0null)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>conn.close();<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>}\u00a0catch\u00a0(SQLException\u00a0e)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>e.printStackTrace();<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>} }<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u524d\u8ff0\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u4f8b\u793a\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9URL\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u30af\u30a8\u30ea\u6587\u306f\u5b9f\u884c\u3057\u305f\u3044SQL\u30af\u30a8\u30ea\u6587\u306b\u4fee\u6b63\u3057\u3001rs.getInt()\u3001rs.getString()\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u691c\u7d22\u7d50\u679c\u306e\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u5024\u3092\u53d6\u5f97\u3057\u3001\u8868\u793a\u3067\u304d\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306b\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u3092\u8ffd\u52a0\u3059\u308b\u306e\u3092\u5fd8\u308c\u305a\u306b\u3001\u6700\u5f8c\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3068\u7d50\u679c\u30bb\u30c3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u9589\u3058\u3066\u30ea\u30bd\u30fc\u30b9\u3092\u89e3\u653e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001JDBC\uff08Java Database Connectivity\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u30af\u30a8\u30ea\u64cd\u4f5c\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066\u7d50 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-101466","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\/ 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Connectivity\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u30af\u30a8\u30ea\u64cd\u4f5c\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066\u7d50 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u7167\u4f1a\u3068\u8868\u793a\u3092\u884c\u3046\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-21T19:00:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-26T12:52:32+00:00\" \/>\n<meta name=\"author\" content=\"\u590f\u6a39, \u98a8\" \/>\n<meta name=\"twitter:card\" 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