JDBC复习

JDBC简介

JDBC快速入门

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

public class JDBC {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://127.0.0.1:3306/db1";
        String username = "root";
        String password = "1234";
        Connection connection = DriverManager.getConnection(url,username,password);
        String sql = "UPDATE emp SET salary = 3000 WHERE ename = '工人3';";
        Statement statement = connection.createStatement();
        int count = statement.executeUpdate(sql);
        System.out.println(count);
        statement.close();
        connection.close();


    }
}

JDBC详解

数据库连接池