图书馆管理系统面向对象编程

zoukankan html css js c++ java

图书馆管理系统面向对象编程

1.登陆界面:程序名Login.java

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.awt.Container;

import java.util.*;

import java.sql.*;

class Login extends JFrame implements ActionListener

{ Container cp=null;

 JFrame f=null;

 JButton j1,j2;

 JTextField t1;

 JPasswordField t2;

 JLabel jlable1,jlable2;

 Color c;

 JPanel jp1,jp2;



Login(){

f=new JFrame("小型图书管理系统");

j1=new JButton("确定");

j2=new JButton("取消");

cp=f.getContentPane();

jlable1=new JLabel(" 输入用户名");

jlable2=new JLabel(" 用户密码");

jp1=new JPanel();

jp2=new JPanel();

t1=new JTextField(18);

t2=new JPasswordField(18);

 jp1.add(jlable1);

 jp1.add(t1);

 jp1.add(jlable2);

jp1.add(t2);

 JLabel JL=new JLabel("<html>欢迎登陆",SwingConstants.CENTER);

 cp.add(JL,"North");

jp2.add(j1);

jp2.add(j2);

 cp.add(jp1,"Center");

 cp.add("South",jp2);

jp1.setBackground(new Color(255,153,255));



Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

//setSize(x,y); /*让系统窗口平铺整个显示器窗口*/

f.setSize(300,300);

 int xcenter=(x-300)/2;

 int ycenter=(y-300)/2;

 f.setLocation(xcenter,ycenter);/*显示在窗口中央*/



 f.setVisible(true);



 //-----------------------------------------------------

 j1.addActionListener(this);//注册事件监听器

 j2.addActionListener(this);

 f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);

}

 public void confirm()//验证用户和密码是否存在

 {

 try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql=con.createStatement();

String uname=t1.getText().trim();

String Mima=t2.getText().trim();

String queryMima="select * from user where 用户名='"+uname+"' and 密码='"+Mima+"'";

ResultSet rs=sql.executeQuery(queryMima);

 if(rs.next())

{

new Book(uname);

f.hide();

 con.close();

 }else{

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

 JOptionPane.YES_NO_OPTION);

 }



t1.setText("");

t2.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(cmd.equals("确定")){

 confirm();

 }

 else if(cmd.equals("取消")){

 f.dispose();

 }

 }

 public static void main(String []arg){



 Login a=new Login();

 }

}

2.图书概览：程序名BookBrower.java

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.awt.Container;

import java.util.*;

import java.sql.*;

class BookBrower 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

 //定义文本框

JTable table;//用来接收数据库中返回的信息

 Object columnName[]={"图书名","图书号","单价","作者","出版社","入库时间"};

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

String sno;

String count="xx";

 BookBrower()

 {

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("<html>图书概览",SwingConstants.CENTER);

label.setForeground(Color.blue);

L=new JLabel("书库现在共有图书"+count+"本");

//------------------------------------------------

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

JScrollPane scrollpane = new JScrollPane(table);

//------------------------------------------------

//布局,添加控件

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();

//jp.add(scrollpane);

JPanel p=new JPanel();//用来放两个表

p.setLayout(new BorderLayout());

p.add(L,"North");

p.add(scrollpane);



cp.add(pp4,"West");

cp.add(p,"Center");

 cp.add(jpS,"South");

cp.add(jpE,"East");

//------------------------------------------------

 Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

f.setSize(400,330);

int xcenter=(x-350)/2;

int ycenter=(y-330)/2;

 f.setLocation(xcenter,ycenter);/*显示在窗口中央*/

 f.setVisible(true);

 //-------------------------------------------------

 jbt1.addActionListener(this);//注册监听器

 jbt2.addActionListener(this);



 /* f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);*/

}

//------------------------------------------------

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("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

String s="select * from book ";

 Statement sql=con.createStatement();

 ResultSet rs=sql.executeQuery(s);





while(rs.next())

 {

 String bname=rs.getString(1);

String bno=rs.getString(2);

String price=rs.getString(3);

String writer=rs.getString(4);

String publish=rs.getString(5);

String indate=rs.getString(6);

ar[i][0]=bname;

ar[i][1]=bno;

ar[i][2]=price;

ar[i][3]=writer;

ar[i][4]=publish;

ar[i][5]=indate;

i++;

 }

 count=""+i+"";

L.setText("书库现在共有图书"+count+"本");

f.repaint();

con.close();

 }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(cmd.equals("确定"))

 {

 f.hide();

 }



 if(cmd.equals("返回"))

 f.hide();



}

public static void main(String []arg){



 BookBrower a=new BookBrower();

 a.showRecord();

}

}

3.图书查询：程序名QueryBook.java

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.awt.Container;

import java.util.*;

import java.sql.*;

class QueryBook implements ActionListener

{



JFrame f3;

Container cp;

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

JButton jbt1,jbt2;//按钮，确定、取消

JLabel label; //标签：请输入图书号

JTextField tf,tf1,tf2,tf3,tf4,tf5,tf6; //定义文本框

JLabel label1,label2,label3,label4;

 QueryBook()

 {

f3=new JFrame();

cp=f3.getContentPane(); // 初始化面板、按钮、标签、文本框

jp1=new JPanel();

jp2=new JPanel();

jp3=new JPanel();

jp4=new JPanel();

jpanelWest=new JPanel();

jp=new JPanel();

//------------------------------------------------

jbt1=new JButton("确定");

jbt2=new JButton("取消");

//------------------------------------------------

label=new JLabel("<html>请输入图书号：",SwingConstants.CENTER);

label.setForeground(Color.blue);

tf=new JTextField(20);

 //------------------------------------------------

tf1=new JTextField(20);

tf2=new JTextField(20);

tf3=new JTextField(20);

tf4=new JTextField(20);

tf5=new JTextField(20);

 tf6=new JTextField(20);

//------------------------------------------------

//布局,添加控件

JPanel jpanel=new JPanel();

jpanel.add(label);

jpanel.add(tf);

JPanel pp4=new JPanel();

 JPanel jpane4=new JPanel();

cp.add(jpanel,"North");

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

JPanel pp3=new JPanel();

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

pp4.add(new JLabel("图书名",SwingConstants.CENTER));

pp2.add(tf1);

pp4.add(new JLabel("图书号",SwingConstants.CENTER));

pp2.add(tf2);

pp4.add(new JLabel("单 价",SwingConstants.CENTER));

pp2.add(tf3);

pp4.add(new JLabel("作 者",SwingConstants.CENTER));

pp2.add(tf4);

pp4.add(new JLabel("出版社",SwingConstants.CENTER));

pp2.add(tf5);

pp4.add(new JLabel("入库时间",SwingConstants.CENTER));

pp2.add(tf6);

pp3.add(jbt1);

 pp3.add(jbt2);





cp.add(pp4,"West");

cp.add(pp2,"Center");

 cp.add(pp3,"South");

cp.add(jpane4,"East");

//------------------------------------------------

 Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

f3.setSize(350,330);

int xcenter=(x-350)/2;

int ycenter=(y-330)/2;

f3.setLocation(xcenter,ycenter);/*显示在窗口中央*/

f3.setVisible(true);

 //-------------------------------------------------

 jbt1.addActionListener(this);//注册监听器

 jbt2.addActionListener(this);





 /*f3.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);*/

}

//------------------------------------------------

public void showRecord()

{

 try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql;

String ql=tf.getText().trim();

String s="select * from book where 图书号 ='"+ql +"'";

 sql=con.createStatement();

ResultSet rs=sql.executeQuery(s);

if(rs.next())

 {



 String bname=rs.getString(1);

String bno=rs.getString(2);

String price=rs.getString(3);

String writer=rs.getString(4);

String publish=rs.getString(5);

String indate=rs.getString(6);

tf1.setText(bname);

tf2.setText(bno);

tf3.setText(price);

tf4.setText(writer);

tf5.setText(publish);

tf6.setText(indate);

}



 else

 {JOptionPane.showMessageDialog(null,"您输入的图书号不存在，请重新输入",

"输入错误", JOptionPane.YES_NO_OPTION);

}

con.close();

 }catch(SQLException g)

{

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

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

 }



 tf1.setEditable(false);

 tf2.setEditable(false);

 tf3.setEditable(false);

 tf4.setEditable(false);

 tf5.setEditable(false);

 tf6.setEditable(false);

}

public void actionPerformed(ActionEvent e)

{

String cmd=e.getActionCommand();

 if(cmd.equals("确定"))

 {

 showRecord();

tf.setText("");

 }



 else if(cmd.equals("取消"))

 f3.hide();



}

public static void main(String []arg){



 QueryBook a=new QueryBook();

}

}

4.图书删除：程序名RemoveBook.java

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.awt.Container;

import java.util.*;

import java.sql.*;

class RemoveBook implements ActionListener

{



JFrame f;

Container cp;

JPanel jpS,jpanelWest;

JButton jbt1,jbt2,jbt3;//按钮，查询、取消、修改

JLabel label,L; //标签：请输入学号

JTextField tf; //定义文本框

JTable table;//用来接收数据库中返回的信息

 Object columnName[]={"图书名","图书号","单价","作者","出版社","入库时间"};

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

String sno;

String count="xx";

 RemoveBook()

 {

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("查询");

jbt2=new JButton("取消");

 jbt3=new JButton("删除");

//------------------------------------------------

label=new JLabel("<html>请输入要删除的图书名：",SwingConstants.CENTER);

label.setForeground(Color.blue);

L=new JLabel("该种图书共有"+count+"本");

//------------------------------------------------

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

JScrollPane scrollpane = new JScrollPane(table);

//------------------------------------------------

tf=new JTextField(18);



//------------------------------------------------

//------------------------------------------------

//布局,添加控件

jpS.add(jbt1);

jpS.add(jbt2);

jpS.add(jbt3);

JPanel jpanel=new JPanel();

jpanel.add(label);

jpanel.add(tf);

JPanel pp4=new JPanel();

 JPanel jpE=new JPanel();

cp.add(jpanel,"North");

JPanel jp=new JPanel();

//jp.add(scrollpane);

JPanel p=new JPanel();//用来放两个表

p.setLayout(new BorderLayout());

p.add(L,"North");

p.add(scrollpane);



cp.add(pp4,"West");

cp.add(p,"Center");

 cp.add(jpS,"South");

cp.add(jpE,"East");

//------------------------------------------------

 Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

f.setSize(400,330);

int xcenter=(x-350)/2;

int ycenter=(y-330)/2;

f.setLocation(xcenter,ycenter);/*显示在窗口中央*/

f.setVisible(true);

 //-------------------------------------------------

 jbt1.addActionListener(this);//注册监听器

 jbt2.addActionListener(this);

 jbt3.addActionListener(this);



 /*f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);*/

}

//------------------------------------------------

int i=0;

 public void showRecord(String ql)

{

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("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql;

String s="select * from book where 图书名 ='"+ql +"'";

 sql=con.createStatement();

 ResultSet rs=sql.executeQuery(s);





while(rs.next())

 {

 String bname=rs.getString(1);

String bno=rs.getString(2);

String price=rs.getString(3);

String writer=rs.getString(4);

String publish=rs.getString(5);

String indate=rs.getString(6);

ar[i][0]=bname;

ar[i][1]=bno;

ar[i][2]=price;

ar[i][3]=writer;

ar[i][4]=publish;

ar[i][5]=indate;

i++;

 }

 count=""+i+"";

L.setText("该种图书共有"+count+"本");

f.repaint();

con.close();System.out.println(ar[0][1]);

 }catch(SQLException g)

{

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

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

 }





}

 public void deleteRecord(int index)

{



 try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql;

String ql=(String)(ar[index][1]);

String s="delete * from book where 图书号 ='"+ql +"'";

 sql=con.createStatement();

int del=sql.executeUpdate(s);

 if(del==1)

 {JOptionPane.showMessageDialog(null,"删除成功！",

"信息", JOptionPane.YES_NO_OPTION);

}

con.close();

f.repaint();

 }catch(SQLException g)

{

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

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

 }





}

 public void actionPerformed(ActionEvent e)

{

String remember="";

String ql="";

String cmd=e.getActionCommand();

 if(cmd.equals("查询"))

 {

 ql=tf.getText().trim();

remember=ql;

 showRecord(ql);

 }

 if(cmd.equals("删除"))

 {

 int index=table.getSelectedRow();

 if( index==-1)

JOptionPane.showMessageDialog(null,"请选定要删除的表格行",

"输入错误", JOptionPane.YES_NO_OPTION);

 else{

 deleteRecord(index);

 //showRecord(remember);

 }

 }

 if(cmd.equals("取消"))

 f.hide();



}

public static void main(String []arg){



 RemoveBook a=new RemoveBook();

}

}

5.图书入库：程序名BookIn.java

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.awt.Container;

import java.util.*;

import java.sql.*;

import javax.swing.text.JTextComponent;

//extends JFrame

class BookIn implements ActionListener

{



JFrame f3;

Container cp;

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

JButton jbt1,jbt2;//按钮:确定、取消、

JLabel label; //标签

JTextField tf1,tf2,tf3,tf4,tf5,tf6; //定义文本框

JLabel label1,label2,label3,label4;

String sno;

 BookIn()

 {

f3=new JFrame();

cp=f3.getContentPane(); // 初始化面板、按钮、标签、文本框

jp1=new JPanel();

jp2=new JPanel();

jp3=new JPanel();

jp4=new JPanel();

jpanelWest=new JPanel();

jp=new JPanel();

//------------------------------------------------

jbt1=new JButton("确定");

jbt2=new JButton("取消");

//------------------------------------------------

label=new JLabel("<html>图书入库",SwingConstants.CENTER);

label.setForeground(Color.blue);





//------------------------------------------------

tf1=new JTextField(20);

tf2=new JTextField(20);

tf3=new JTextField(20);

tf4=new JTextField(20);

tf5=new JTextField(20);

 tf6=new JTextField(20);

//------------------------------------------------

//布局,添加控件

jp1.add(jbt1);

jp1.add(jbt2);

sno=tf4.getText();

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

JPanel jpanel=new JPanel();

jpanel.add(label);

JPanel pp4=new JPanel();

 JPanel jpane4=new JPanel();

cp.add(jpanel,"North");

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

JPanel pp3=new JPanel();

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

pp4.add(new JLabel("图书名",SwingConstants.CENTER));

pp2.add(tf1);

pp4.add(new JLabel("图书号",SwingConstants.CENTER));

pp2.add(tf2);

pp4.add(new JLabel("单 价",SwingConstants.CENTER));

pp2.add(tf3);

pp4.add(new JLabel("作 者",SwingConstants.CENTER));

pp2.add(tf4);

pp4.add(new JLabel("出版社",SwingConstants.CENTER));

pp2.add(tf5);

pp4.add(new JLabel("入库时间",SwingConstants.CENTER));

pp2.add(tf6);

pp3.add(jbt1);

pp3.add(jbt2);





cp.add(pp4,"West");

cp.add(pp2,"Center");

 cp.add(pp3,"South");

cp.add(jpane4,"East");

//------------------------------------------------

 Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

f3.setSize(350,330);

int xcenter=(x-350)/2;

int ycenter=(y-330)/2;

f3.setLocation(xcenter,ycenter);/*显示在窗口中央*/

f3.setVisible(true);

 //-------------------------------------------------

 jbt1.addActionListener(this);//注册监听器

 jbt2.addActionListener(this);





 /*f3.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);*/

}

//------------------------------------------------

 public void insertRecord()

{

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

 tf4.getText().equals("")||tf5.getText().equals("")||tf6.getText().equals(""))

{

JOptionPane.showMessageDialog(f3,"请填写图书资料");

return;

}

 try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql;

String s="insert into book values('"+tf1.getText()+"','"+tf2.getText()+"','"+

tf3.getText()+"','"+tf4.getText()+"','"+tf5.getText()+"','"+tf6.getText()+"');";

//查询输入的图书号是否在数据库中存在

 String query="select * from book where 图书号='"+tf2.getText()+"'";

sql=con.createStatement();

ResultSet rs=sql.executeQuery(query);//返回查询结果集

boolean moreRecords=rs.next();//判断结果集是否有数据

 if(moreRecords)

 {

JOptionPane.showMessageDialog(f3,"图书号已经被使用，请重新输入");

con.close();

tf2.setText("");

return;

 }

int insert=sql.executeUpdate(s);

if(insert==1)

 {

JOptionPane.showMessageDialog(null,"图书信息录入成功！");

tf1.setText("");

tf2.setText("");

tf3.setText("");

tf4.setText("");

tf5.setText("");

tf6.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(cmd.equals("确定"))

 {

 insertRecord();

 }

else if(cmd.equals("取消"))

 f3.hide();



}

 public static void main(String []arg){



 BookIn a=new BookIn();

 }

}

6.主界面：程序名Book.java

/*本类为用户界面*/

import java.net.*;

import java.sql.*;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.util.*;

import javax.swing.*;

import javax.swing.border.*;import java.util.*;

class Book extends JFrame implements ActionListener

{

JButton QueryScore=new JButton("图书查询");

JButton QueryXuefen=new JButton("图书入库");

JButton jiangfa=new JButton("图书删除");

JButton xuanke=new JButton("图书概览");

JButton gaiMima=new JButton("修改密码");

JMenuBar mb = new JMenuBar();//菜单栏

JPanel jp=new JPanel();//用来填放子模块

Container cp=getContentPane();

 String username;

Book(){}

 Book(String username)

{

this.username=username;

mb.add(QueryScore);

mb.add(QueryXuefen);

mb.add(jiangfa);

mb.add(xuanke);

mb.add(gaiMima);

 cp.add(mb,"North");

// 设置边框

 jp.setBorder(BorderFactory.createTitledBorder(BorderFactory

.createLineBorder(Color.blue, 2),null,

TitledBorder.CENTER, TitledBorder.TOP));

jp.setLayout(new BorderLayout());

 JLabel label1 = new JLabel(new ImageIcon("4.jpg"));

jp.add(label1);

 /* JLabel JL=new JLabel("<html>欢迎登陆",SwingConstants.CENTER);

 jp.add(JL,"North");*/

JLabel label2 = new JLabel(new ImageIcon("2.jpg"));

//jp.add(label2,"South");

JScrollPane scrollpane=new JScrollPane(jp);

cp.add(scrollpane);

setTitle("欢迎登陆");



Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height; /*取得显示器窗口的高度*/

//setSize(x,y); /*让系统窗口平铺整个显示器窗口*/

setSize(600,600);

 int xcenter=(x-600)/2;

 int ycenter=(y-600)/2;

 setLocation(xcenter,ycenter);/*显示在窗口中央*/

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//注册临听器

QueryScore.addActionListener(this);

QueryXuefen.addActionListener(this);

jiangfa.addActionListener(this);

xuanke.addActionListener(this);

gaiMima.addActionListener(this);

}

public void actionPerformed(ActionEvent e)

{

String cmd=e.getActionCommand();

if (cmd.equals("图书查询"))

{

new QueryBook();

}

if (cmd.equals("图书入库"))

{

new BookIn();

}

if (cmd.equals("图书删除"))

{

new RemoveBook();

}

if (cmd.equals("图书概览"))

{

new BookBrower().showRecord();

}

if (cmd.equals("修改密码"))

{

new UpdateMima(username);

}

}

public static void main(String[]args)

{

new Book("");

}

}

7.密码修改：程序名UpdateMima.java

import java.net.*;

import java.sql.*;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.util.*;

import javax.swing.*;

class UpdateMima extends JFrame implements ActionListener

{



JFrame f;

Container cp;

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

JButton 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;

String sno;

UpdateMima(){}

 UpdateMima(String username)

 {

sno=username;

f=new JFrame();

cp=f.getContentPane(); // 初始化

jp1=new JPanel();

jp2=new JPanel();

jp3=new JPanel();

jp4=new JPanel();

jpanelWest=new JPanel();

jp=new JPanel();

//------------------------------------------------

jbt1=new JButton("确定");

jbt2=new JButton("取消");

//------------------------------------------------

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

label.setForeground(Color.blue);

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

name=new JTextField(20);

 //name.setEditable(false);



//------------------------------------------------

tf1=new JPasswordField(20);

tf2=new JPasswordField(20);

tf3=new JPasswordField(20);

//------------------------------------------------

//布局,添加控件

jp1.add(jbt1);

jp1.add(jbt2);

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

JPanel jpanel=new JPanel();

jpanel.add(label);

JPanel pp4=new JPanel();

 JPanel jpane4=new JPanel();

cp.add(jpanel,"North");

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);



//pp3.add(jbt1);

//pp3.add(jbt2);



cp.add(pp4,"West");

cp.add(pp2,"Center");

 //cp.add(pp3,"South");

cp.add(jpane4,"East");

//------------------------------------------------

 Toolkit kit=Toolkit.getDefaultToolkit();

Dimension screen=kit.getScreenSize();

int x=screen.width; /*取得显示器窗口的宽度*/

int y=screen.height;

f.setSize(350,330); /*取得显示器窗口的高度*/

int xcenter=(x-350)/2;

int ycenter=(y-330)/2;

f.setLocation(xcenter,ycenter);/*显示在窗口中央*/

//f.setTitle("修改密码");

f.setVisible(true);



 //-------------------------------------------------

 jbt1.addActionListener(this);//注册监听器

 jbt2.addActionListener(this);



 /*f.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

}

);*/

}

public void updateM()

{

 try{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

 }catch(ClassNotFoundException e){System.out.println("加载驱动程序失败!");}

try{

String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=Book.mdb";//直接使用当前类目录下的数据库文件

Connection con=DriverManager.getConnection(url);

Statement sql=con.createStatement();

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

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

ResultSet rs=sql.executeQuery(queryMima);

 if(rs.next())

{

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

 String s="update 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！");



}

con.close();

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(cmd.equals("确定"))

{

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",

 JOptionPane.YES_NO_OPTION);

 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 UpdateMima("");

}

}

查看全文

相关阅读:
php中的抽象方法和抽象类，简单明了，一点通
 PHP_保留两位小数并且四舍五入(可用于精度计算)_保留两位小数并且不四舍五入
 如何使用php生成唯一ID的4种方法
 Redis案例——商品秒杀，购物车
 centos+python2+apache2+django环境搭建
 前端上传图片并显示
 通过容器提交镜像（docker commit）以及推送镜像（docker push）
Name or service not known原因大全
 VMware Workstation 与 Device/Credential Guard 不兼容.在禁用 Device/Credenti
win10家庭版VMware，禁用Device/Credential Guard不兼容问题

原文地址：https://www.cnblogs.com/tuanduiboke/p/4575118.html