今天學習IDEA操作JDBC，MySQL包導入到項目

// 1、註冊數據庫的驅動
//        Driver driver=new com.mysql.jdbc.Driver();
//        DriverManager.registerDriver(driver);
        String driver = "com.mysql.jdbc.Driver";
        Class.forName(driver);//java基礎反射

        // 2.獲取數據庫連接

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

        //3.獲取操作數據庫的對象
        Statement statement = connection.createStatement();
        String sql = "select * from user";
        ResultSet resultSet = statement.executeQuery(sql);

        //4.遍歷結果集，取出數據
        while (resultSet.next()){
           String name =  resultSet.getString("name");
            System.out.print("名字："+name);
        }
        connection.close();
 

//更新數據
String sql = "UPDATE user set name=‘小萌‘ where id=1";
int resule = statement.executeUpdate(sql);

System.out.println(resule);

statement.close();
connection.close();


Junit單元測試  
項目=》新建test目錄 ，project structure=>選中test文件點擊sources如此即可在test文件夾下創建java文件

IDEA操作jdbc總結