Java\u304b\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001JDBC\uff08Java Database Connectivity\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u5bfe\u5fdc\u3059\u308b\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u3059\u3002<\/p>\n
1.\u95a2\u9023\u3059\u308bJDBC\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002
\n“`java
\nimport java.sql.*;
\n“`
\n2.\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002
\n“`java
\nString url = “jdbc:mysql:\/\/localhost:3306\/mydatabase”; \/\/\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9aURL
\nString username = “root”; \/\/\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30e6\u30fc\u30b6\u30fc\u540d
\nString password = “123456”; \/\/\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d1\u30b9\u30ef\u30fc\u30c9
\nConnection conn = null;
\ntry {
\nconn = DriverManager.getConnection(url, username, password);
\n} catch (SQLException e) {
\ne.printStackTrace();
\n}
\n“`
\n3.SQL\u30af\u30a8\u30ea\u6587\u3092\u5b9f\u884c\u3057\u3001\u7d50\u679c\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002
\n“`java
\nString sql = “SELECT * FROM mytable”; \/\/SQL\u30af\u30a8\u30ea\u6587
\nStatement stmt = null;
\nResultSet rs = null;
\ntry {
\nstmt = conn.createStatement();
\nrs = stmt.executeQuery(sql);
\nwhile (rs.next()) {
\nint id = rs.getInt(“id”); \/\/\u5217\u540d\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97
\nString name = rs.getString(“name”);
\nint age = rs.getInt(3); \/\/\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97
\n\/\/\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b
\nSystem.out.println(“ID: ” + id);
\nSystem.out.println(“Name: ” + name);
\nSystem.out.println(“Age: ” + age);
\n}
\n} catch (SQLException e) {
\ne.printStackTrace();
\n} finally {
\ntry {
\nif (rs != null) rs.close();
\nif (stmt != null) stmt.close();
\nif (conn != null) conn.close();
\n} catch (SQLException e) {
\ne.printStackTrace();
\n}
\n}
\n“`<\/p>\n
\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u6700\u521d\u306b`DriverManager`\u30af\u30e9\u30b9\u306e`getConnection`\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002\u6b21\u306b\u3001`createStatement`\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066SQL\u30af\u30a8\u30ea\u6587\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306e`Statement`\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001`executeQuery`\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u7d50\u679c\u306e`ResultSet`\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001`ResultSet`\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e`next`\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u7d50\u679c\u3092\u4e00\u884c\u305a\u3064\u8aad\u307f\u53d6\u308a\u3001\u5217\u540d\u307e\u305f\u306f\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3068\u30ea\u30bd\u30fc\u30b9\u3092\u9589\u3058\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u306a\u304a\u3001\u4e0a\u8a18\u306e\u4f8b\u3067\u306fMySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u63a5\u7d9aURL\u3068\u95a2\u9023\u3059\u308b\u8a2d\u5b9a\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u304b\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001JDBC\uff08Java Database Connectivity\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u5bfe\u5fdc\u3059\u308b\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-134572","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n