JDBC\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u3059\u308b\u624b\u9806\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u30021. JDBC\u30c9\u30e9\u30a4\u30d0\u306e\u30ed\u30fc\u30c9\u3001\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eJDBC\u30c9\u30e9\u30a4\u30d0\u3092\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001MySQL\u306eJDBC\u30c9\u30e9\u30a4\u30d0\u306f\u300ecom.mysql.jdbc.Driver\u300f\u3067\u3059\u3002Class.forName()\u30e1\u30bd\u30c3\u30c9\u3067\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u30022. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u78ba\u7acb\u3001DriverManager\u30af\u30e9\u30b9\u306egetConnection()\u30e1\u30bd\u30c3\u30c9\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eURL\u3001\u30e6\u30fc\u30b6\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306a\u3069\u306e\u63a5\u7d9a\u60c5\u5831\u3092\u6307\u5b9a\u3057\u307e\u3059\u30023. SQL\u6587\u306e\u5b9f\u884c\u3001Connection\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ecreateStatement()\u30e1\u30bd\u30c3\u30c9\u3067Statement\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002Statement\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eexecuteQuery()\u30e1\u30bd\u30c3\u30c9\u3067SQL\u554f\u3044\u5408\u308f\u305b\u6587\u3092\u5b9f\u884c\u3057\u305f\u308a\u3001executeUpdate()\u30e1\u30bd\u30c3\u30c9\u3067SQL\u66f4\u65b0\u6587\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u30024. \u554f\u3044\u5408\u308f\u305b\u7d50\u679c\u306e\u51e6\u7406\u3001SQL\u554f\u3044\u5408\u308f\u305b\u6587\u3092\u5b9f\u884c\u3057\u305f\u5834\u5408\u306f\u3001ResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u554f\u3044\u5408\u308f\u305b\u7d50\u679c\u3092\u51e6\u7406\u3067\u304d\u307e\u3059\u3002ResultSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306enext()\u30e1\u30bd\u30c3\u30c9\u3067\u554f\u3044\u5408\u308f\u305b\u7d50\u679c\u3092\u53cd\u5fa9\u51e6\u7406\u3067\u304d\u307e\u3059\u3002getXXX()\u30e1\u30bd\u30c3\u30c9\u3067\u7279\u5b9a\u306e\u9805\u76ee\u306e\u5024\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u30025. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u30af\u30ed\u30fc\u30ba\u3001Connection\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eclose()\u30e1\u30bd\u30c3\u30c9\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u30af\u30ed\u30fc\u30ba\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001JDBC\u3067MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002“`javaimport java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;public class JdbcExample {
\npublic static void main(String[] args) {
\n\/\/ JDBC\u30c9\u30e9\u30a4\u30d0\u306e\u30ed\u30fc\u30c9
\ntry {
\nClass.forName(“com.mysql.jdbc.Driver”);
\n} catch (ClassNotFoundException e) {
\ne.printStackTrace();
\n}
\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u78ba\u7acb
\nConnection conn = null;
\ntry {
\nconn = DriverManager.getConnection(“jdbc:mysql:\/\/localhost:3306\/test”, “root”, “password”);
\n} catch (SQLException e) {
\ne.printStackTrace();
\n}
\n\/\/ SQL\u554f\u3044\u5408\u308f\u305b\u6587\u306e\u5b9f\u884c
\nStatement stmt = null;
\nResultSet rs = null;
\ntry {
\nstmt = conn.createStatement();
\nrs = stmt.executeQuery(“SELECT * FROM users”);
\nwhile (rs.next()) {
\nString name = rs.getString(“name”);
\nint age = rs.getInt(“age”);
\nSystem.out.println(“Name: ” + name + “, Age: ” + age);
\n}
\n} catch (SQLException e) {
\ne.printStackTrace();
\n} finally {
\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u30af\u30ed\u30fc\u30ba
\ntry {
\nif (rs != null) {
\nrs.close();
\n}
\nif (stmt != null) {
\nstmt.close();
\n}
\nif (conn != null) {
\nconn.close();
\n}
\n} catch (SQLException e) {
\ne.printStackTrace();
\n}
\n}
\n}}“`\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306e\u300cjdbc:mysql:\/\/localhost:3306\/test\u300d\u306fMySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eURL\u3001\u300croot\u300d\u306f\u30e6\u30fc\u30b6\u540d\u3001\u300cpassword\u300d\u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u3059\u3002\u72b6\u6cc1\u306b\u3088\u3063\u3066\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
JDBC\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u3059\u308b\u624b\u9806\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u30021. JDBC\u30c9\u30e9\u30a4\u30d0\u306e\u30ed\u30fc\u30c9\u3001\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eJDBC\u30c9\u30e9\u30a4\u30d0\u3092\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001MySQL\u306eJDBC\u30c9\u30e9\u30a4\u30d0\u306f\u300ecom.mysql.jdbc.Driver\u300f […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-115141","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n