Java课设-简单的通讯录系统（增删改查连接数据库）

jakeonil

已于 2023-06-16 10:51:52 修改

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CC 4.0 BY-SA版权

分类专栏： GUI 文章标签： java 数据库

于 2022-12-16 17:09:28 首次发布

本文链接：https://blog.youkuaiyun.com/CSH__/article/details/128344940

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3 篇文章

订阅专栏

一.题目介绍

二.实验思路

这里主要是运用到了jdbc来连接数据库，而在数据库中存在的是通讯录的记录，有id，姓名，手机号，创建时间，修改时间。同时使用的是swing的来做可视化界面，其中运用到了弹窗，按钮，标签，表格等组件，同时还有着监视器来监测的是按钮的动作。

理论知识：这里使用的是手写sql语句，而不采取MyBatis框架，首先要连接数据库，通过sql语句来读取与更新数据，要学会select，update，delete语句的使用。同时要运用到接口与实现类的结构模式，简化开发操作。

三.实验代码简单展示及数据库表的简单展示

1.项目的结构简介

2.项目主界面代码及连接数据库层的接口实现类代码

主界面的代码：

package view;


import service.ViewService;
import service.impl.ViewServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.sql.SQLException;

//主窗口的进入
public class Mainview extends JFrame {
    ViewService v = new ViewServiceImpl();
    public void Mainview() throws ClassNotFoundException, SQLException {
        //数据库的加入
        JFrame jFrame = new JFrame("通讯录系统");//创建对象
        jFrame.setVisible(true);//窗口的可视化
        jFrame.setBounds(650, 150, 700, 400);//窗口的初始化
        jFrame.setResizable(false);
        Container container = jFrame.getContentPane();
        container.setBackground(Color.lightGray);
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//关闭事件
        container.setLayout(null);
        //初始化按钮信息
        JLabel jLabelr = new JLabel("通讯录管理系统By陈某宏");
        jLabelr.setFont(new Font("行书", Font.BOLD, 30));
        jLabelr.setForeground(Color.BLUE);
        jLabelr.setBounds(180, 250, 400, 100);
        container.add(jLabelr);
        JButton button1 = new JButton("浏览所有的通讯信息");
        JButton button2 = new JButton("增加通讯录信息");
        JButton button3 = new JButton("查询相应ID或姓名的通讯录成员");
        JButton button4 = new JButton("删除指定的通讯录成员");
        JButton button5 = new JButton("修改指定的通讯录成员");
        jFrame.update(jFrame.getGraphics());
        button1.setBounds(150, 20, 400, 40);
        button2.setBounds(150, 70, 400, 40);
        button3.setBounds(150, 120, 400, 40);
        button4.setBounds(150, 170, 400, 40);
        button5.setBounds(150, 220, 400, 40);
        //添加按钮
        container.add(jLabelr);
        container.add(button1);
        container.add(button2);
        container.add(button3);
        container.add(button4);
        container.add(button5);
        jFrame.update(jFrame.getGraphics());
        button1.addActionListener(new AbstractAction() {//按钮1 增加学生信息
            @Override
            public void actionPerformed(ActionEvent e) {
                v.selectAll();
            }
        });
        //按钮2
        button2.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                v.add();
            }
        });
        button3.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                v.selectByxx();

            }
        });
        button4.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                v.delete();
            }
        });
        button5.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                v.update();
            }
        });
    }
}

连接数据库，实现增删改查的操作代码：

package dao.impl;

import dao.PhonerelationshipDao;
import entity.PhonerelationshipEntity;
import utils.MysqlDriverutil;

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

public class PhonerelationshipImpl implements PhonerelationshipDao {

    Connection connection;

    {
        try {
            connection = new MysqlDriverutil().getconnection();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }

    @Override

    public List<PhonerelationshipEntity> selectAll() {
        String sql = "select * from phonerelationship";
        PreparedStatement std;
        ArrayList<PhonerelationshipEntity> phonerelationshipEntities = new ArrayList<>();
        try {
            std = connection.prepareStatement(sql);
            ResultSet resultSet = std.executeQuery(sql);
            while (resultSet.next()) {
                PhonerelationshipEntity p = new PhonerelationshipEntity();
                p.setId(resultSet.getString("id"));
                p.setName(resultSet.getString("name"));
                p.setPhonenum(resultSet.getString("phonenum"));
                p.setCreattime(resultSet.getDate("createtime"));
                p.setUpdatetime(resultSet.getDate("updatetime"));
                phonerelationshipEntities.add(p);
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return phonerelationshipEntities;
    }

    @Override
    public List<PhonerelationshipEntity> selectByIdorName(String idorname) {
        String sql = "select * from phonerelationship where `id`=" + "'" + idorname + "'" + " or `name` like" + " '%" + idorname + "%'";
        PreparedStatement std;
        ArrayList<PhonerelationshipEntity> phonerelationshipEntities = new ArrayList<>();
        try {
            std = connection.prepareStatement(sql);
            ResultSet resultSet = std.executeQuery(sql);
            while (resultSet.next()) {
                PhonerelationshipEntity p = new PhonerelationshipEntity();
                p.setId(resultSet.getString("id"));
                p.setName(resultSet.getString("name"));
                p.setPhonenum(resultSet.getString("phonenum"));
                p.setCreattime(resultSet.getDate("createtime"));
                p.setUpdatetime(resultSet.getDate("updatetime"));
                phonerelationshipEntities.add(p);
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return phonerelationshipEntities;

    }

    @Override
    public int deleteById(String idorallname) {
        String sql = "delete from phonerelationship where `id`=" + "'" + idorallname + "'" + " or `name`=" + "'" + idorallname + "'";
        PreparedStatement std;
        int i = 0;
        try {
            std = connection.prepareStatement(sql);
            i = std.executeUpdate(sql);
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return i;

    }

    @Override
    public int updateById(PhonerelationshipEntity p) {
        PreparedStatement std = null;
        Timestamp timestamp = new Timestamp(new Date().getTime());
        int i = 0;
        String sql = "update phonerelationship set `name`=" + "'" + p.getName() + "'" + ",`phonenum`=" + "'" + p.getPhonenum() + "'" + ",updatetime=" + "'" + timestamp + "'" + " where id=" + "'" + p.getId() + "'";
        try {
            std = connection.prepareStatement(sql);
            i = std.executeUpdate(sql);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return i;
    }

    @Override
    public void add(PhonerelationshipEntity p) {
        PreparedStatement std = null;
        String sql = "insert into phonerelationship (`id`,`name`,`phonenum`,`createtime`,`updatetime`) value (?,?,?,?,?)";
        try {
            std = connection.prepareStatement(sql);
            std.setString(1, p.getId());
            std.setString(2, p.getName());
            std.setString(3, p.getPhonenum());
            std.setString(4, String.valueOf(new Timestamp(new Date().getTime())));
            std.setString(5, String.valueOf(new Timestamp(new Date().getTime())));
            std.executeUpdate();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }
}