Java学习Day18

今天编写 JDBC 连接 MySQL 的代码
eg：import java.sql.*;
public class JdbcExample {
public static void main(String[] args) {
String url = "jdbc:mysql://localhost:3306/mydb";
String user = "root";
String password = "password";
try (Connection conn = DriverManager.getConnection(url, user, password);
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM users")) {
while (rs.next()) {
System.out.println(rs.getInt("id") + " " + rs.getString("name"));
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
注意：
使用try-with-resources自动关闭资源
MySQL 8 + 驱动类为com.mysql.cj.jdbc.Driver，需添加时区参数（?serverTimezone=UTC）