JDBC编程步骤

Posted 2021-03-10 silentteller

加载驱动程序：

Class.forName(driverClass)
//加载mysql驱动
Class.forName("com.mysql.jdbc.Driver")
//加载Oracle驱动
Class.forName("oracle.jdbc.driver.OracleDriver")

获得数据库连接：

String url = "jdbc:mysql://localhost:3306/student";
String user = "root";
String password = "123456";
Connection connection = DriverManager.getConnection(url, user, password);

创建Statement对象：

Statement statement = connection.createStatement();

例子：

package com.silentteller.test;

import java.sql.*;

public class Test {
    public static void main(String[] args) {
        try {
            //1.加载驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");
            //2. 获得数据库连接
            String url = "jdbc:mysql://localhost:3306/student";
            String user = "root";
            String password = "123456";
            Connection connection = DriverManager.getConnection(url, user, password);
            System.out.println(connection);
            //3.操作数据库，实现增删改查
            Statement statement = connection.createStatement();
            String sql = "select * from student";
            ResultSet rs = statement.executeQuery(sql);
            //如果有数据，rs.next()返回true
            while(rs.next()){
                System.out.println(rs.getString("id") + rs.getString("student_id") + rs.getString("name")
                                + rs.getInt("age") + rs.getString("sex") + rs.getString("birthday"));
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }
}