JDBC\uff08Java\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\uff09\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u9593\u3067\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u305f\u3081\u306e\u6a19\u6e96\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u3042\u308a\u3001JDBC\u3092\u4ecb\u3057\u3066SQL\u6587\u3092\u5b9f\u884c\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u8868\u306e\u5185\u5bb9\u3092\u8fd4\u3059\u306b\u306f\u3001JDBC\u306eResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002ResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u691c\u7d22\u7d50\u679c\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308bJava\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002JDBC\u3092\u4f7f\u7528\u3057\u3066\u8868\u306e\u5185\u5bb9\u3092\u8fd4\u3059\u305f\u3081\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002
\n“`java
\nimport java.sql.*;
\npublic class Main {
\npublic static void main(String[] args) {
\ntry {
\n\/\/ 1. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c9\u30e9\u30a4\u30d0\u306e\u30ed\u30fc\u30c9
\nClass.forName(“com.mysql.cj.jdbc.Driver”);
\n\/\/ 2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u78ba\u7acb
\nConnection connection = DriverManager.getConnection(“jdbc:mysql:\/\/localhost:3306\/mydatabase”, “username”, “password”);
\n\/\/ 3. Statement\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210
\nStatement statement = connection.createStatement();
\n\/\/ 4. \u691c\u7d22\u6587\u3092\u5b9f\u884c\u3057\u3066\u3001ResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97
\nResultSet resultSet = statement.executeQuery(“SELECT * FROM mytable”);
\n\/\/ 5. ResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3066\u8868\u306e\u5185\u5bb9\u3092\u53d6\u5f97
\nwhile (resultSet.next()) {
\nint id = resultSet.getInt(“id”);
\nString name = resultSet.getString(“name”);
\nint age = resultSet.getInt(“age”);
\nSystem.out.println(“id: ” + id + “, name: ” + name + “, age: ” + age);
\n}
\n\/\/ 6. \u63a5\u7d9a\u306e\u30af\u30ed\u30fc\u30ba
\nresultSet.close();
\nstatement.close();
\nconnection.close();
\n} catch (ClassNotFoundException e) {
\ne.printStackTrace();
\n} catch (SQLException e) {
\ne.printStackTrace();
\n}
\n}
\n}
\n“`
\n\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001`mydatabase`\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d\u3001`mytable`\u304c\u8868\u540d\u3001`username`\u3068`password`\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u3059\u3002\u691c\u7d22\u6587`SELECT * FROM mytable`\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u8868\u5168\u4f53\u306e\u5185\u5bb9\u3092\u8fd4\u3057\u3001`ResultSet`\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u53cd\u5fa9\u51e6\u7406\u3057\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001`getInt`\u3084`getString`\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u8868\u5185\u306e\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001ResultSet\u3001Statement\u3001\u304a\u3088\u3073Connection\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30af\u30ed\u30fc\u30ba\u3059\u308b\u306e\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
JDBC\uff08Java\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\uff09\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u9593\u3067\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u305f\u3081\u306e\u6a19\u6e96\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u3042\u308a\u3001JDBC\u3092\u4ecb\u3057\u3066SQL\u6587\u3092\u5b9f\u884c\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u8868\u306e\u5185\u5bb9\u3092\u8fd4\u3059\u306b\u306f\u3001JDB […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-124587","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n