vip21-javaweb/day03/src/Select.java

import pojo.Brand;

import java.sql.*;

public class Select {
    /**
     * * 添加：添加品牌
     * * 查询：查询所有数据
     * * 修改：根据id修改
     * * 删除：根据id删除
     */

    public static void main(String[] args)  {
        try {
            add();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    private static void add() throws ClassNotFoundException, SQLException {

        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/vip21?autoReconnect=true&failOverReadOnly=false&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8";
        String user = "root";
        String passwd = "123456";

        String brandName = "三只";

        Connection connection = DriverManager.getConnection(url, user, passwd);

        String selectSql = "SELECT * FROM tb_brand WHERE brand_name LIKE ?";
        PreparedStatement preparedStatement = connection.prepareStatement(selectSql);
        preparedStatement.setString(1, "%" + brandName + "%");

        ResultSet resultSet = preparedStatement.executeQuery();

        while ( resultSet.next() ) {
            Brand brand = new Brand();
            brand.setId(resultSet.getInt("id"));
            brand.setBrandName(resultSet.getString("brand_name"));
            brand.setCompanyName(resultSet.getString("company_name"));
            brand.setOrdered(resultSet.getInt("ordered"));
            brand.setDescription(resultSet.getString("description"));
            brand.setStatus(resultSet.getInt("status"));
            System.out.println( brand );
        }

        preparedStatement.close();
        connection.close();
    }

}