JDBC(宠物管理系统)

使用纯Java方式连接数据库

    public Connection getConnection()
    {
        try {
            //1.加载驱动
            Class.forName("com.mysql.jdbc.Driver");
    　　　　 //forName是静态方法 com.mysql.jdbc是包名  Driver是类名。通过forName方法调用包名为com.mysql.jdbc的包中的Driver方法
            System.out.println("驱动加载成功！");      
            String url="jdbc:mysql://localhost:3306/epet?useUnicode=true&characterEncoding=utf-8";
            //jdbc:mysql: 是协议 类似于https://
            //localhost 是地址
            //3306 是端口
            //epet是数据库名
            String user="root";
            String password="123456";
            try {
                con=DriverManager.getConnection(url, user, password);
                System.out.println("连接成功!");
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return con;            

    }
    

宠物管理系统菜单

public void menu()
    {
        do {
            System.out.println("\t==========宠物管理系统==========");        
            System.out.println("\t1.添加宠物 \n\t2.更新健康值和亲密度 \n\t3.查看宠物信息\n\t4.删除宠物信息\n\t5.退出");        
                System.out.print("请选择：");
                int choose=input.nextInt();
                switch (choose) {
                case 1:
                    System.out.println("\t========添加宠物========");
                    add();
                    continue;
                case 2:
                    System.out.println("2");
                    
                    continue;
                case 3:
                    show();
                    continue;
                case 4:
                    delete();
                    continue;
                case 5:                
                    System.out.println("拜拜！");
                    break;
                default:
                    System.out.println("选择错误！");
                    continue;
                }
                break;
            } while (true);    
    }

添加宠物方法

public void add()
    {
        getConnection();
        try {
            ps=con.prepareStatement("insert into dog(name,strain,health,love)values(?,?,?,?)");
            System.out.print("请输入狗狗昵称：");
            String name = input.next();
            System.out.print("请输入品种:");
            String brand=input.next();
            System.out.print("请输入健康值：");
            int hy=input.nextInt();
            System.out.print("请输入亲密值：");
            int love = input.nextInt();            
            ps.setString(1, name);
            ps.setString(2, brand);
            ps.setInt(3, hy);
            ps.setInt(4, love);
            int count=ps.executeUpdate();
            if (count>0) {
                System.out.println("添加成功！");
                show();
            }else
            {
                System.out.println("添加失败！");
            }
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally
        {
            try {
                ps.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

展示所有宠物信息方法

    public void show()
    {
        getConnection();
        try {
        System.out.println("******************狗狗信息表******************");
            System.out.println("编号\t姓名\t健康值\t亲密度\t品种");
            ps=con.prepareStatement("select * from dog");
            rs=ps.executeQuery();
            while (rs.next()) {
                System.out.print(rs.getInt(1)+"\t");
                System.out.print(rs.getString(2)+"\t");
                System.out.print(rs.getInt(3)+"\t");
                System.out.print(rs.getInt(4)+"\t");
                System.out.println(rs.getString(5)+"\t");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            try {
                con.close();
                rs.close();
                ps.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
        }
    }

删除宠物方法

    public void    delete()
    {
        try{
            ps=con.prepareStatement("delete from dog where id=?");
            System.out.println("请输入你要删除的狗狗id");
            int id =input.nextInt();
            ps.setInt(1, id);
            ps.setInt(1, 9);
            int count=ps.executeUpdate();
            if (count>0) {
                System.out.println("删除成功！");
                show();
            }else
            {
                System.out.println("删除失败！");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    
    }

调用方法

public static void main(String[] args) {
        // TODO Auto-generated method stub
        Conn conn= new Conn();
        conn.menu();
    }