localhost9000/AccountzzyDaoImp.java

package com.zzy.dao.mysql;

import com.zzy.dao.AccountzzyDao;
import com.zzy.domain.Accountzzy;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

import static com.zzy.dao.mysql.DBHelper.url;

public class AccountzzyDaoImp implements AccountzzyDao {
    @Override
    public List<Accountzzy> findAll() {
        ArrayList<Accountzzy> accountzzy = new ArrayList<Accountzzy>();
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
//            String url="jdbc:mysql://localhost:3306/food?userSSL=false&serverTimezone=Asia/Shanghai";
            String user = "root";
            String password ="159357";

            Connection conn= DriverManager.getConnection(url,user,password);
            String sql ="select *from users";
            Statement sts =conn.createStatement();
            ResultSet rs=sts.executeQuery(sql);

            while(rs.next()) {
                Accountzzy account1 =new Accountzzy();
                ((Accountzzy) account1).setUserid(((ResultSet) rs).getString("userid"));
                account1.setUsername(rs.getString("username"));
                account1.setAddress(rs.getString("address"));
                account1.setPhone(rs.getString("phone"));
                account1.setPassword(rs.getString("password"));
                account1.add(account1);

            }
            rs.close();
            sts.close();
            conn.close();
        }catch (Exception e) {
            e.printStackTrace();
        }
        return accountzzy;
    }


    @Override
    public Accountzzy findById(String userid) {
        Accountzzy account = null;
        try (java.sql.Connection connection = DBHelper.getConnection(); // 假设DBHelper类有getConnection方法
             PreparedStatement pstmt = connection.prepareStatement("select * from users where userid = ?")) {

            pstmt.setString(1, userid); // 设置参数
            try (ResultSet rs = pstmt.executeQuery()) {
                if (rs.next()) {
                    account = new Accountzzy();
                    // 类似地从rs中设置account的属性
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return account;
    }
        @Override
    public int create(Accountzzy accountzzy) {
        return 0;
    }

    @Override
    public int modify(Accountzzy accountzzy) {
        return 0;
    }

    @Override
    public int remove(Accountzzy accountzzy) {
        return 0;
    }
}