用java寫一個(gè)郵件發(fā)送代碼

public boolean mainto()

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{

boolean flag = true;

//建立郵件會(huì)話

Properties pro = new Properties();

pro.put("mail.smtp.host","smtp.qq.com");//存儲(chǔ)發(fā)送郵件的服務(wù)器

pro.put("mail.smtp.auth","true"); //通過(guò)服務(wù)器驗(yàn)證

Session s =Session.getInstance(pro); //根據(jù)屬性新建一個(gè)郵件會(huì)話

//s.setDebug(true);

//由郵件會(huì)話新建一個(gè)消息對(duì)象

MimeMessage message = new MimeMessage(s);

//設(shè)置郵件

InternetAddress fromAddr = null;

InternetAddress toAddr = null;

try

{

fromAddr = new InternetAddress(451144426+"@qq.com"); //郵件發(fā)送地址

message.setFrom(fromAddr); //設(shè)置發(fā)送地址

toAddr = new InternetAddress("12345367@qq.com"); //郵件接收地址

message.setRecipient(Message.RecipientType.TO, toAddr); //設(shè)置接收地址

message.setSubject(title); //設(shè)置郵件標(biāo)題

message.setText(content); //設(shè)置郵件正文

message.setSentDate(new Date()); //設(shè)置郵件日期

message.saveChanges(); //保存郵件更改信息

Transport transport = s.getTransport("smtp");

transport.connect("smtp.qq.com", "451144426", "密碼"); //服務(wù)器地址，郵箱賬號(hào)，郵箱密碼

transport.sendMessage(message, message.getAllRecipients()); //發(fā)送郵件

transport.close();//關(guān)閉

}

catch (Exception e)

{

e.printStackTrace();

flag = false;//發(fā)送失敗

}

return flag;

}

這是一個(gè)javaMail的郵件發(fā)送代碼，需要一個(gè)mail.jar

用JAVA編寫購(gòu)物系統(tǒng)的代碼是什么？（急）

算是最簡(jiǎn)單的吧

package cn.job01;

import java.util.Scanner;

public class Lx07 {

public static void choice() {

System.out.println("登陸菜單 ");

System.out.println("1登陸系統(tǒng)");

System.out.println("2退出");

}

static void choice1() {

System.out.println("購(gòu)物管理系統(tǒng)客戶信息");

System.out.println("1顯示所有客戶信息");

System.out.println("2添加客戶信息");

System.out.println("3修改客戶信息");

System.out.println("4查詢客戶信息");

}

static void choice2() {

System.out.println("購(gòu)物管理系統(tǒng)真情回饋");

System.out.println("1幸運(yùn)大放送");

System.out.println("2幸運(yùn)抽獎(jiǎng)");

System.out.println("3生日問(wèn)候");

}

public static void main(String[] args) {

choice();

Scanner input = new Scanner(System.in);

System.out.println("請(qǐng)輸入1or2");

int num = input.nextInt();

switch (num) {

case 1:

System.out.println("主菜單");

System.out.println("1客戶信息管理");

System.out.println("2購(gòu)物結(jié)算");

System.out.println("3真情回饋");

System.out.println("4注銷");

break;

}

System.out.println("選擇輸入數(shù)字");

int num1 = input.nextInt();

switch (num1) {

case 1:

choice1();

break;

case 2:

System.out.println("購(gòu)物結(jié)算");

break;

case 3:

choice2();

break;

case 4:

choice();

break;

}

}

}

求java編寫的倉(cāng)庫(kù)管理系統(tǒng)源代碼或詳細(xì)設(shè)計(jì)

import java.util.*;

import java.awt.event.*;

import java.awt.*;

import javax.swing.*;

import java.io.*;

class 商品 extends Panel

{String 代號(hào),名稱;int 庫(kù)存;float 單價(jià);

商品(String 代號(hào),String 名稱,int 庫(kù)存,float 單價(jià))

{this.代號(hào)=代號(hào);this.名稱=名稱;this.庫(kù)存=庫(kù)存;this.單價(jià)=單價(jià);

}

}

class ShowWin extends JFrame implements ActionListener

{ Hashtable hashtable=null;

JTextField 代號(hào)文本框=new JTextField(),

名稱文本框=new JTextField(),

庫(kù)存文本框=new JTextField(),

單價(jià)文本框=new JTextField(),

查詢文本框=new JTextField(),

查詢信息文本框=new JTextField(),

刪除文本框=new JTextField();

JButton b_add=new JButton("添加商品"),

b_del=new JButton("刪除商品"),

b_xun=new JButton("查詢商品"),

b_xiu=new JButton("修改商品"),

b_show=new JButton("顯示商品清單");

JTextArea 顯示區(qū)=new JTextArea(25,10);

ShowWin()

{super("倉(cāng)庫(kù)管理窗口");

hashtable=new Hashtable();

Container con=getContentPane();

JScrollPane pane=new JScrollPane(顯示區(qū));

顯示區(qū).setEditable(false);

JPanel save=new JPanel();

save.setLayout(new GridLayout(8,2));

save.add(new Label("輸入代號(hào):"));

save.add(代號(hào)文本框);

save.add(new Label("輸入名稱:"));

save.add(名稱文本框);

save.add(new Label("輸入庫(kù)存:"));

save.add(庫(kù)存文本框);

save.add(new Label("輸入單價(jià):"));

save.add(單價(jià)文本框);

save.add(new Label("單擊添加:"));

save.add(b_add);

save.add(new Label("單擊修改:"));

save.add(b_xiu);

save.add(new Label("輸入查詢代號(hào):"));

save.add(查詢文本框);

save.add(new Label("單擊查詢:"));

save.add(b_xun);

JPanel del=new JPanel();

del.setLayout(new GridLayout(2,2));

del.add(new Label("輸入刪除的代號(hào):"));

del.add(刪除文本框);

del.add(new Label("單擊刪除:"));

del.add(b_del);

JPanel show=new JPanel();

show.setLayout(new BorderLayout());

show.add(pane,BorderLayout.CENTER);

show.add(b_show,BorderLayout.SOUTH);

JSplitPane split_one,split_two;

split_one=new JSplitPane(JSplitPane.VERTICAL_SPLIT,save,del);

split_two=new

JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,split_one,show);

con.add(split_two,BorderLayout.CENTER);

JPanel xun=new JPanel();

xun.add(new Label("所得信息:"));

xun.add(查詢信息文本框);

xun.setLayout(new GridLayout(2,1));

con.add(xun,BorderLayout.SOUTH);

b_add.addActionListener(this);

b_del.addActionListener(this);

b_xun.addActionListener(this);

b_xiu.addActionListener(this);

b_show.addActionListener(this);

}

public void actionPerformed(ActionEvent e)

{if(e.getSource()==b_add)

{String daihao=null,mingcheng=null;int kucun=0;float danjia=0.0f;

daihao=代號(hào)文本框.getText();mingcheng=名稱文本框.getText();

kucun=Integer.parseInt(庫(kù)存文本框.getText());

danjia=Float.valueOf(單價(jià)文本框.getText()).floatValue();

商品 goods=new 商品(daihao,mingcheng,kucun,danjia);

hashtable.put(daihao,goods);

try{FileOutputStream file=new FileOutputStream("goods.txt");

ObjectOutputStream out=new ObjectOutputStream(file);

out.writeObject(hashtable); out.close();

}

catch(IOException event){}

}

else if(e.getSource()==b_del)

{String daihao1=刪除文本框.getText();

try{FileInputStream come_in=new FileInputStream("goods.txt");

ObjectInputStream in=new ObjectInputStream(come_in);

hashtable=(Hashtable)in.readObject(); //////

in.close();

}

catch(ClassNotFoundException event){}

catch(IOException event){}

商品 temp=(商品)hashtable.get(daihao1);

{hashtable.remove(daihao1);}

try{FileOutputStream file=new FileOutputStream("goods.txt");

ObjectOutputStream out =new ObjectOutputStream(file);

out.writeObject(hashtable);//

out.close();

}

catch(IOException event){}

}

//

else if(e.getSource()==b_xun)

{ String aa;

aa=查詢文本框.getText();

查詢信息文本框.setText(null);

try{FileInputStream come_in=new FileInputStream("goods.txt");

ObjectInputStream in =new ObjectInputStream(come_in);

hashtable=(Hashtable)in.readObject(); ////

in.close();

}

catch(ClassNotFoundException event){}

catch(IOException event){}

商品 a=(商品)hashtable.get(aa);

查詢信息文本框.setText(" 代號(hào)："+a.代號(hào)+" 名稱："+a.名稱+" 庫(kù)存："+a.庫(kù)存+" 單價(jià)："+a.單價(jià));

}

//

else if(e.getSource()==b_xiu)

{ String bb;

bb=代號(hào)文本框.getText();

try{FileInputStream come_in=new FileInputStream("goods.txt");

ObjectInputStream in=new ObjectInputStream(come_in);

hashtable=(Hashtable)in.readObject(); //////

in.close();

}

catch(ClassNotFoundException event){}

catch(IOException event){}

商品 temp=(商品)hashtable.get(bb);

{hashtable.remove(bb);}

try{FileOutputStream file=new FileOutputStream("goods.txt");

ObjectOutputStream out =new ObjectOutputStream(file);

out.writeObject(hashtable);//

out.close();

}

catch(IOException event){}

String daihao1=null,mingcheng1=null;int kucun1=0;float danjia1=0.0f;

daihao1=代號(hào)文本框.getText();mingcheng1=名稱文本框.getText();

kucun1=Integer.parseInt(庫(kù)存文本框.getText());

danjia1=Float.valueOf(單價(jià)文本框.getText()).floatValue();

商品 goods1=new 商品(daihao1,mingcheng1,kucun1,danjia1);

hashtable.put(daihao1,goods1);

try{FileOutputStream file=new FileOutputStream("goods.txt");

ObjectOutputStream out=new ObjectOutputStream(file);

out.writeObject(hashtable); out.close();

}

catch(IOException event){}

}

//

else if(e.getSource()==b_show)

{ 顯示區(qū).setText(null);

try{FileInputStream come_in=new FileInputStream("goods.txt");

ObjectInputStream in =new ObjectInputStream(come_in);

hashtable=(Hashtable)in.readObject(); ////

}

catch(ClassNotFoundException event){}

catch(IOException event){}

Enumeration enum=hashtable.elements();

while(enum.hasMoreElements())

{ 商品 te=(商品)enum.nextElement();

顯示區(qū).append("商品代號(hào):"+te.代號(hào)+" ");

顯示區(qū).append("商品名稱:"+te.名稱+" ");

顯示區(qū).append("商品庫(kù)存:"+te.庫(kù)存+" ");

顯示區(qū).append("商品單價(jià):"+te.單價(jià)+" ");

顯示區(qū).append("\n ");

}

}

}

}

public class LinkListFour

{public static void main(String args[])

{ ShowWin win=new ShowWin();

win.setSize(400,350);

win.setVisible(true);

win.addWindowListener(new WindowAdapter()

{public void windowClosing(WindowEvent e)

{ System.exit(0);}});

}

}