《Java程序设计》终极不改版【下】 5.总结

package 大学生信息管理系统;

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.util.*;

import java.sql.*;

class StudentInfomationBrower   

implements 

ActionListener

{  

JFrame f;

Container cp;

JPanel jpS,jpanelWest;

JButton 

jbt1,jbt2;//按钮，查询、取消、修改

JLabel label,L;                 

//标签

JTable table;//用来接收数据库中返回的信息

Object columnName[]={"学生名","学号","Java","数据结构","概率统计","入学时间"};

Object ar[][] =new Object[80][6];

String sno;

StudentInfomationBrower()

{

f=new JFrame();

cp=f.getContentPane(); // 初始化面板、按钮、标签、文本框

jpS=new JPanel();      

jpanelWest=new JPanel();

jbt1=new JButton("确定");  

jbt2=new JButton("返回");

label=new JLabel("学生情况概览",SwingConstants.CENTER);

label.setForeground(Color.blue);

table=new JTable(ar,columnName);//ar存放表中的数据，columnname表示列名

JScrollPane scrollpane = new JScrollPane(table);

jpS.add(jbt1);

jpS.add(jbt2);

JPanel jpanel=new JPanel();

jpanel.add(label);

JPanel pp4=new JPanel();

JPanel jpE=new JPanel();

cp.add(jpanel,"North");

JPanel jp=new JPanel();

JPanel p=new JPanel();//用来放两个表

p.setLayout(new BorderLayout());

p.add(scrollpane);

cp.add(pp4,"West");

cp.add(p,"Center");

cp.add(jpS,"South");

cp.add(jpE,"East");

Dimension

screen=Toolkit.getDefaultToolkit().getScreenSize();

 f.setSize(400,330);

 f.setLocation((screen.width-350)/2,(screen.height-350)/2);

 f.setVisible(true);

jbt1.addActionListener(this);//注册监听器

jbt2.addActionListener(this);

}

int i=0;

public void showRecord()

while(i>=0)

{   

ar[i][0]="";

ar[i][1]="";

ar[i][2]="";

ar[i][3]="";

ar[i][4]="";

ar[i][5]="";

i--;

i=0;

try{

Class.forName("com.hxtt.sql.access.AccessDriver");

}catch(ClassNotFoundException

e){System.out.println("加载驱动程序失败!");}

Connection con =

DriverManager.getConnection("jdbc:Access:/D:/Student.mdb");

 String

s="select * from 表book ";

Statement sql=con.createStatement();

  ResultSet

rs=sql.executeQuery(s);

 while(rs.next())

String sname=rs.getString(1);

String sno=rs.getString(2);

String ;

String DataStructure=rs.getString(4);

String Data=rs.getString(5);

String time=rs.getString(6);

ar[i][0]=sname;

ar[i][1]=sno;

ar[i][2]=java;

ar[i][3]=DataStructure;

ar[i][4]=Data;

ar[i][5]=time;

i++;

f.repaint();

 con.close();

}catch(SQLException g)

 System.out.println("E

Code"+g.getErrorCode());

M"+g.getMessage());

 }

 public void

actionPerformed(ActionEvent e)

{ 

cmd=e.getActionCommand();

if(cmd.equals("确定"))

f.dispose();

if(cmd.equals("返回"))

f.dispose();             

public static void main(String

[]arg){

StudentInfomationBrower a=new StudentInfomationBrower();

a.showRecord();

import java.net.*;

import java.io.*;

class UpdatePassword extends JFrame

implements ActionListener

JPanel jp1,jp2,jp3,jp4,jp,jpanelWest;

jbt1,jbt2;//按钮，确定、取消

JLabel label;              

//标签：修改密码

JTextField name;

JPasswordField tf1,tf2,tf3;   

//定义文本框

JLabel label1,label2,label3,label4;

UpdatePassword(){}

UpdatePassword(String username)

sno=username;

cp=f.getContentPane(); // 初始化

jp1=new JPanel();      

jp2=new JPanel();

jp3=new JPanel();

jp4=new JPanel();

jp=new JPanel();

jbt2=new JButton("取消");

label=new JLabel("修改密码",SwingConstants.CENTER);

label.setFont(new Font("BOLD",Font.BOLD,15));

name=new JTextField(20);

tf1=new JPasswordField(20);

tf2=new JPasswordField(20);

tf3=new JPasswordField(20);

jp1.add(jbt1);

jp1.add(jbt2);

jp1.add(new JLabel("您好"+"xx"+"欢迎登陆学生信息系统"));

JPanel jpane4=new JPanel();

JPanel pp2=new JPanel(new GridLayout(6,1));

JPanel pp3=new JPanel();

pp4.setLayout(new GridLayout(6,1));

pp4.add(new JLabel("用户名: ",SwingConstants.RIGHT));

pp2.add(name);

pp4.add(new JLabel("原密码: ",SwingConstants.RIGHT));

pp2.add(tf1);

pp4.add(new JLabel(" 新密码: ",SwingConstants.RIGHT));

pp2.add(tf2);

pp4.add(new JLabel("确认密码: ",SwingConstants.RIGHT));

pp2.add(tf3);

pp2.add(new JLabel());

JPanel jpbutton=new JPanel();

jpbutton.add(jbt1);

jpbutton.add(jbt2);

pp2.add(jpbutton);

cp.add(pp2,"Center");

cp.add(jpane4,"East");

 f.setSize(350,330);                     

 f.setLocation((screen.width-350)/2,(screen.height-330)/2);

 f.setTitle("修改密码");

public void updateM()

String uname=name.getText().trim();

String queryMima="select * from 表user where 用户名='"+uname+"'";

ResultSet rs=sql.executeQuery(queryMima);

if(rs.next())

String newMima=tf2.getText().trim();

String s="update 表user set 密码='"+newMima+"' where 用户名 ='"+uname +"'";

sql=con.createStatement();

int updateMima=sql.executeUpdate(s);

if(updateMima==1)

JOptionPane.showMessageDialog(f,"密码修改成功！");

 f.repaint();

}else{

JOptionPane.showMessageDialog(null,"该用户不存在","警告！",

JOptionPane.YES_NO_OPTION);

name.setText("");

tf1.setText("");

tf2.setText("");

tf3.setText("");

  }

catch(SQLException g)

System.out.println("E Code"+g.getErrorCode());

System.out.println("E M"+g.getMessage());

public void actionPerformed(ActionEvent e)

String cmd=e.getActionCommand();

 {

 if(name.getText().equals("")||tf1.getText().equals("")||tf2.getText().equals("")||tf3.getText().equals(""))

JOptionPane.showMessageDialog(null,"请填写用户的所有信息","提示",

return;

if(tf2.getText().trim().equals(tf3.getText().trim()))

updateM();

else if(cmd.equals("取消"))

f.hide();

public static void main(String[]args)

  new

UpdatePassword("");

<b>5.</b><b>系统实现（包括系统运行界面等）</b>

开始动画：

登录界面，输入用户名，用户密码：

主界面各种功能：

学生搜索：

录入学生：

删除学生：

<b> </b>

学生概览：

修改密码:

通过这次

<a>参考文献</a>

[1]陈国军.Java程序设计基础（第5版)[M].北京：清华大学出版社，2006年

  [6]

耿祥义,张跃平.

JAVA实用教程[M].清华大学出版社，2005年