啊 不是 js學習 我也是工作需要啊 jdbc

jdbc其實

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class mainTest {

	public static void main(String[] args) {

		// com.mysql.jdbc.Driver d;

		try {
			// 加載MySql的驅動類
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			System.out.println("加載驅動失敗！");
			e.printStackTrace();
		}

		String url = "jdbc:mysql://localhost:3306/test";
		String username = "root";
		String password = "root";
		try {

			String sql = "select * from tb_cat";

			Connection con = DriverManager.getConnection(url, username, password);
			Statement stmt = con.createStatement();
			// PreparedStatement pstmt = con.prepareStatement(sql) ;

			ResultSet rs = stmt.executeQuery(sql);
			// int rows = stmt.executeUpdate("INSERT INTO ...") ;
			// boolean flag = stmt.execute(String sql) ;

			while (rs.next()) {
				String name = rs.getString("cat_name");
				String pass = rs.getString(1);
				
				System.out.println(name);
				System.out.println(pass);
			}

		} catch (SQLException se) {
			System.out.println("數據庫連接失敗！");
			se.printStackTrace();
		}
	}
}

 

 太困了 感覺不到自己意識