mysq数据库实战小型管理系统

前后用了一天多时间断断续续独立完成编码，成功跑起来的时候激动坏了， 第一次用了软件工程课上学到的方法工具来规划整个小项目，最后抽象出八个类  ，使用经典的工厂类设计模式。

ps:睡觉，，，


1： 工厂类
2：关闭工具类
3：增删改查类
4：增加界面类
5：删除界面类
6：查询界面类
7：选择操作界面类
8：登陆界面类

工厂类：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class FactoryClass {
    public Connection getConnection()  {
        Connection con = null ;
        String url = "org.gjt.mm.mysql.Driver" ;
        try
        {
         Class.forName(url) ;
        }catch(ClassNotFoundException cfe)  {
            cfe.printStackTrace();
        };
        try  {
                 con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","include") ;
        }catch(SQLException se)  {
            se.printStackTrace();
        }
        return con ;
    }

}

操作工具类

import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.ResultSet;


public class JDBCUtils {
    /**关闭结果集，语句块，连接
     *
     * @param rs
     * @param st
     * @param con
     */
    public static void close(ResultSet rs,PreparedStatement st,Connection con)  {
        try  {
            rs.close() ;
            st.close() ;
            con.close() ;
        }catch(SQLException se)  {
            se.printStackTrace();
        }
    }
   
    /**关闭语句块与连接
     *
     * @param st
     * @param con
     */
    public static void close(PreparedStatement st,Connection con)  {
        try  {
            st.close();
            con.close();
        }catch(SQLException se) {
            se.printStackTrace();
        }   
    }
   
    /**
     * 关闭连接
     *
     */
    public static void close(Connection con)  {
        try  {
            con.close();
        }catch(SQLException se)  {
            se.printStackTrace();
        }
    }
   
    /**
     * 关闭结果集
     */
    public static void close(ResultSet rs)  {
        try  {
            rs.close();
        }catch(SQLException se)  {
            se.printStackTrace();
        }
    }
   
    /**
     * 关闭语句块
     */
    public static void close(PreparedStatement st)  {
        try  {
            st.close();
        }catch(SQLException se)  {
            se.printStackTrace();
        }
    }

}

基础增删改查类

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;


public class PeopleBiz {
   
    /*展示所有成员
     *
     */
    public void showAll() throws SQLException  {
        FactoryClass factory = new FactoryClass() ;
        Connection con = factory.getConnection() ;
        String sql = "select * from people" ;
        PreparedStatement ps  = con.prepareStatement(sql) ;
        ResultSet rs = ps.executeQuery() ;
        while(rs.next())  {
            String nameResult = rs.getString(2) ;
            String passwordResult = rs.getString(3) ;
            System.out.println("姓名："+nameResult+"   密码："+passwordResult) ;
        }
        JDBCUtils.close(rs,ps,con);
       
    }
   
    /**
     * 插入新成员
     * @throws SQLException
     */
    public void insertData(String name,String password) throws SQLException {
        FactoryClass factory = new FactoryClass() ;
        Connection con  = factory.getConnection() ;
        String sql = "insert into people(name,password) values('"+name+"','"+password+"') ";
        PreparedStatement ps =  con.prepareStatement(sql) ;
        ps.executeUpdate() ;
        JDBCUtils.close(ps,con);
    }
   
    /**
     * 按照名字为索引删除成员
     * @throws SQLException
     */
   
    public void deleteByName(String name) throws SQLException  {
        FactoryClass factory = new FactoryClass() ;
        Connection con = factory.getConnection() ;
        String sql = "delete from people where name= '"+name+"' " ;
        PreparedStatement ps = con.prepareStatement(sql) ;
        ps.executeUpdate() ;
        JDBCUtils.close(ps,con);
       
    }
   
   
    /**
     * 更改数据库中的成员
     * @throws SQLException
     */
    public void updateDate(String name,String password) throws SQLException  {
        FactoryClass factory = new FactoryClass() ;
        Connection con = factory.getConnection() ;
        String sql = "update people set(name,password) values('"+name+"' , '"+password+"')" ;
        PreparedStatement ps = con.prepareStatement(sql) ;
        ps.executeUpdate() ;
        JDBCUtils.close(ps,con);
    }
   
    public String[] selectByName(String name) throws SQLException  {
        FactoryClass factory = new FactoryClass() ;
        Connection con = factory.getConnection() ;
        String sql  = "select * from people where name= '"+name+"' " ;
        PreparedStatement ps = con.prepareStatement(sql) ;
        ResultSet rs = ps.executeQuery() ;
        String data[] = new String[2] ;
        while(rs.next())  {
            data[0] = rs.getString(1) ;
            data[1] = rs.getString(2) ;
        }
        return data ;
    }
   
   
   
}
   


/*
  * 下面开始编写测试主函数Tester
 */
/*class Tester  {
    public static void main(String args[]) throws Exception  {
        PeopleBiz p = new PeopleBiz() ;
        p.insertData("王如意", "include");
        //p.deleteByName("王") ;
        p.showAll();
    }
}*/

登陆界面类

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.Border;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;


public class Login extends JFrame   {
   
    private JTextField nameText ;
    private JPasswordField passText ;
    public Login()  {
        this.setTitle("数据库登陆");
        this.setSize(330,230);
        this.setLocation(300,300);
        this.setResizable(false);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
        JPanel mainpanel = new JPanel() ;
        mainpanel.setLayout(null);
        Border border = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED) ;
       mainpanel.setBorder(BorderFactory.createTitledBorder(border,"输入登陆信息",TitledBorder.CENTER,TitledBorder.TOP));
        this.add(mainpanel,BorderLayout.CENTER) ;
        mainpanel.setLayout(null)      ;  
        JLabel nameLabel = new JLabel("输入用户名: ") ;
        nameLabel.setBounds(30,30,80,22);
        mainpanel.add(nameLabel) ;
        nameText = new JTextField() ;
        nameText.setBounds(115,30,120,22);
        mainpanel.add(nameText) ;
        JLabel passLabel = new JLabel("请输入密码: ") ;
        passLabel.setBounds(30,60,80,22);
        mainpanel.add(passLabel) ;
        passText = new JPasswordField() ;
        passText.setBounds(115,60,120,22) ;
        mainpanel.add(passText);
        JButton reset = new JButton("重置") ;
        JButton login = new JButton("登陆") ;
        reset.setBounds(40,90,60,20) ;
        login.setBounds(130,90,60,20);
        mainpanel.add(login) ;
        mainpanel.add(reset) ;
        reset.addActionListener(new ActionListener()  {
            public void actionPerformed(ActionEvent e)  {
                nameText.setText("");
                passText.setText("") ;
            }
        });
       
        login.addActionListener(new ActionListener() {
           
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                if(nameText.getText().equals("daemon") && passText.getText().equals("include"))  {
                    JOptionPane.showMessageDialog(null, "欢迎进入系统","登陆成功",JOptionPane.INFORMATION_MESSAGE);
                    new Option() ;
                }
                else JOptionPane.showMessageDialog(null, "古文！！！","doubi",JOptionPane.INFORMATION_MESSAGE);
               
            }
        });
       
           
    }

}

class Tester {
    public static void main(String args[])throws Exception  {
        new Login() ;
       
    }
}

选择操作类

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;


public class Option extends JFrame  {
    JButton addButton = new JButton("增加") ;
    JButton deleteButton = new JButton("删除") ;
    JButton queryButton = new JButton("查询") ;
    public Option()  {
        this.setTitle("请选择操作") ;
        this.setSize(330,230);
        this.setVisible(true);
        JPanel panel = new JPanel() ;   
        panel.add(addButton) ;
        panel.add(deleteButton) ;
        panel.add(queryButton) ;
        this.add(panel,BorderLayout.CENTER);
       
        /**
         * 下面开始为三个时间按钮添加事件响应
         */
       
        addButton.addActionListener(new ActionListener()  {
            public void actionPerformed(ActionEvent e)  {
                new Add() ;
            }
        });
       
        deleteButton.addActionListener(new ActionListener()  {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
                new Delete() ;
               
            }
        });
       
        queryButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                new Query() ;
               
            }
        });
       
    }

}

以下为具体实现增删改查

//添加成员类
import java.awt.BorderLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class Add extends JFrame  {
    private JTextField nametext ;
    private JTextField passtext ;
    public Add()  {
        this.setTitle("请输入要插入的成员信息");
        this.setSize(400,400);
        this.setVisible(true);
        JPanel panel = new JPanel() ;
        panel.setLayout(null);
        JLabel namelab = new JLabel("姓名") ;
        namelab.setBounds(30,30,80,22);
        panel.add(namelab) ;
        this.nametext = new JTextField() ;
        this.nametext.setBounds(115,30,120,22);
        panel.add(nametext) ;
        JLabel passlab = new JLabel("密码") ;
        passlab.setBounds(30,60,80,22);
        panel.add(passlab) ;
        passtext = new JTextField() ;
        passtext.setBounds(115,60,120,22);
        panel.add(passtext) ;
        this.add(panel,BorderLayout.CENTER) ;
        JButton ok = new JButton("插入") ;
        this.add(ok,BorderLayout.SOUTH) ;
       
        ok.addActionListener(new ActionListener()  {
            public void actionPerformed(ActionEvent e)  {
                String nameinput = nametext.getText();
                String passinput = passtext.getText() ;
                boolean flag = false;
                PeopleBiz pb = new PeopleBiz() ;
                try {
                    pb.insertData(nameinput, passinput);
                } catch (SQLException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                JOptionPane.showMessageDialog(null, "数据插入成功","插入结果",JOptionPane.INFORMATION_MESSAGE);
               
            }
        });
       
    }
}


//删除成员类
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class Delete extends JFrame {
    private JTextField nametext ;
    private JButton ok ;
    public Delete()  {
        this.setTitle("输入要删除的姓名") ;
        this.setVisible(true) ;
        this.setSize(400,400);
        JPanel panel = new JPanel() ;
        panel.setLayout(null) ;
        JLabel namelab= new JLabel("姓名") ;
        namelab.setBounds(30,30,80,22);
        panel.add(namelab) ;
        nametext = new JTextField() ;
        nametext.setBounds(115,30,120,22) ;
        panel.add(nametext) ;
        this.add(panel,BorderLayout.CENTER) ;
        this.ok = new JButton("确认删除") ;
        this.add(this.ok,BorderLayout.SOUTH) ;
       
        this.ok.addActionListener(new ActionListener()  {
            public void actionPerformed(ActionEvent e)  {
                String deletename = nametext.getText() ;
                PeopleBiz p = new PeopleBiz() ;
                try {
                    p.deleteByName(deletename);
                } catch (SQLException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                JOptionPane.showMessageDialog(null, "数据删除成功","反馈信息！",JOptionPane.INFORMATION_MESSAGE);
            }
        });
       
    }

}


//查询界面类
import java.awt.BorderLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class Query extends JFrame  {
    private JTextField nametext ;
    private JTextField passtext ;
    public Query()  {
        this.setTitle("所有查询成员信息！");
        this.setSize(400,400);
        this.setVisible(true);
        JPanel panel = new JPanel() ;
        panel.setLayout(null);
        JLabel namelab = new JLabel("姓名") ;
        namelab.setBounds(30,30,80,22);
        panel.add(namelab) ;
        this.nametext = new JTextField() ;
        this.nametext.setBounds(115,30,120,22);
        panel.add(nametext) ;
        JLabel passlab = new JLabel("密码") ;
        passlab.setBounds(30,60,80,22);
        panel.add(passlab) ;
        passtext = new JTextField() ;
        passtext.setBounds(115,60,120,22);
        panel.add(passtext) ;
        this.add(panel,BorderLayout.CENTER) ;
        JButton ok = new JButton("查询") ;
        this.add(ok,BorderLayout.SOUTH) ;
       
        ok.addActionListener(new ActionListener()  {
            public void actionPerformed(ActionEvent e)  {
                String nameinput = nametext.getText();
                boolean flag = false;
                PeopleBiz pb = new PeopleBiz() ;
                try {
                    String res[]=pb.selectByName(nameinput);
                    passtext.setText(res[1]);
                    JOptionPane.showMessageDialog(null, "查询结果已显示在密码框！","查询结果",JOptionPane.INFORMATION_MESSAGE);
                } catch (SQLException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                JOptionPane.showMessageDialog(null, "数据插入成功","插入结果",JOptionPane.INFORMATION_MESSAGE);
               
            }
        });
       
    }
}