{"id":78451,"date":"2024-03-20T19:50:52","date_gmt":"2024-03-20T10:50:52","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e6%a9%9f%e8%83%bd%e3%82%92%e4%bd%9c%e6%88%90%e3%81%97%e3%81%a6%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ab%e6%8e%a5%e7%b6%9a\/"},"modified":"2025-08-12T02:16:11","modified_gmt":"2025-08-11T17:16:11","slug":"java-%e3%81%a7%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e6%a9%9f%e8%83%bd%e3%82%92%e4%bd%9c%e6%88%90%e3%81%97%e3%81%a6%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ab%e6%8e%a5%e7%b6%9a","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e6%a9%9f%e8%83%bd%e3%82%92%e4%bd%9c%e6%88%90%e3%81%97%e3%81%a6%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%81%ab%e6%8e%a5%e7%b6%9a\/","title":{"rendered":"java \u3067\u30ed\u30b0\u30a4\u30f3\u6a5f\u80fd\u3092\u4f5c\u6210\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u63a5\u7d9a\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3092\u884c\u3044\u307e\u3059\u3002 1. \u307e\u305a\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5bfe\u5fdc\u3057\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c9\u30e9\u30a4\u30d0\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001MySQL \u306e\u5834\u5408\u306f mysql-connector-java \u3067\u3059\u3002 2. java.sql \u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u3042\u308b Connection \u3001 ResultSet \u3001 Statement \u306a\u3069\u306e\u5fc5\u8981\u306a\u30af\u30e9\u30b9\u3068\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002 3. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002 Connection \u30af\u30e9\u30b9\u306e getConnection() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9URL\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">String\u00a0url\u00a0=\u00a0\"jdbc:mysql:\/\/localhost:3306\/mydatabase\";\r\nString\u00a0user\u00a0=\u00a0\"username\";\r\nString\u00a0password\u00a0=\u00a0\"password\";\r\nConnection\u00a0conn\u00a0=\u00a0DriverManager.getConnection(url,\u00a0user,\u00a0password);<\/pre>\n<p>4. SQL\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3059\u308b\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\">Statement\u00a0stmt\u00a0=\u00a0conn.createStatement();<\/pre>\n<p>SQL\u30af\u30a8\u30ea\u3092\u66f8\u304f\u3001\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u540d\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u63a2\u3059\u30af\u30a8\u30ea\u3092\u66f8\u304f\u3053\u3068<\/p>\n<pre class=\"post-pre\">String\u00a0sql\u00a0=\u00a0\"SELECT\u00a0*\u00a0FROM\u00a0users\u00a0WHERE\u00a0username='test'\u00a0AND\u00a0password='123456'\";<\/pre>\n<p>SQL\u554f\u3044\u5408\u308f\u305b\u3092\u5b9f\u884c\u3057\u3001\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\">ResultSet\u00a0rs\u00a0=\u00a0stmt.executeQuery(sql);<\/pre>\n<p>\u7d50\u679c\u30bb\u30c3\u30c8\u306b\u30c7\u30fc\u30bf\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3001\u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u30ed\u30b0\u30a4\u30f3\u306b\u6210\u529f\u3057\u305f\u3068\u3057\u3066\u6271\u3046\u3002<\/p>\n<pre class=\"post-pre\">if\u00a0(rs.next())\u00a0{<\/pre>\n<p>System.out.println(\u201c\u767b\u5f55\u6210\u529f\u201d); }\u00a0else\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>System.out.println(\u201c\u767b\u5f55\u5931\u8d25\u201d); }<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u65e5\u672c\u8a9e\u3067\u30d1\u30e9\u30d5\u30ec\u30fc\u30ba\u3055\u308c\u305f\u6587\u306e 1 \u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p>\u5b8c\u5168\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">import\u00a0java.sql.*;\r\npublic\u00a0class\u00a0LoginExample\u00a0{<\/pre>\n<p>&nbsp;<\/p>\n<p>public\u00a0static\u00a0void\u00a0main(String[]\u00a0args)\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>try\u00a0{<\/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\u00a0user\u00a0=\u00a0\u201cusername\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0password\u00a0=\u00a0\u201cpassword\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>Connection\u00a0conn\u00a0=\u00a0DriverManager.getConnection(url,\u00a0user,\u00a0password);<\/p>\n<p>&nbsp;<\/p>\n<p>Statement\u00a0stmt\u00a0=\u00a0conn.createStatement();<\/p>\n<p>&nbsp;<\/p>\n<p>String\u00a0sql\u00a0=\u00a0\u201cSELECT\u00a0*\u00a0FROM\u00a0users\u00a0WHERE\u00a0username=&#8217;test&#8217;\u00a0AND\u00a0password=&#8217;123456&#8217;\u201d;<\/p>\n<p>&nbsp;<\/p>\n<p>ResultSet\u00a0rs\u00a0=\u00a0stmt.executeQuery(sql);<\/p>\n<p>&nbsp;<\/p>\n<p>if\u00a0(rs.next())\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>System.out.println(\u201c\u767b\u5f55\u6210\u529f\u201d);<\/p>\n<p>&nbsp;<\/p>\n<p>}\u00a0else\u00a0{<\/p>\n<p>&nbsp;<\/p>\n<p>System.out.println(\u201c\u767b\u5f55\u5931\u8d25\u201d);<\/p>\n<p>&nbsp;<\/p>\n<p>}<\/p>\n<p>&nbsp;<\/p>\n<p>rs.close();<\/p>\n<p>&nbsp;<\/p>\n<p>stmt.close();<\/p>\n<p>&nbsp;<\/p>\n<p>conn.close();<\/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<pre class=\"post-pre\"><\/pre>\n<p>\u6ce8\u610f\uff1a\u4e0a\u8a18\u30b3\u30fc\u30c9\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a\u3068\u30ed\u30b0\u30a4\u30f3\u6a5f\u80fd\u306e\u57fa\u672c\u7684\u306a\u624b\u9806\u3092\u793a\u3059\u3082\u306e\u3067\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u306b\u3042\u305f\u3063\u3066\u306f\u3001\u5165\u529b\u306e\u691c\u8a3c\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u6697\u53f7\u5316\u306a\u3069\u306e\u5b89\u5168\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u63a5\u7d9a\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3092\u884c\u3044\u307e\u3059\u3002 1. \u307e\u305a\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5bfe\u5fdc\u3057\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c9\u30e9\u30a4\u30d0\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001MySQL \u306e\u5834\u5408\u306f mysql [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-78451","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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