public boolean mainto()
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{
boolean flag = true;
//建立邮件会话
Properties pro = new Properties();
pro.put("mail.smtp.host","smtp.qq.com");//存储发送邮件的服务器
pro.put("mail.smtp.auth","true"); //通过服务器验证
Session s =Session.getInstance(pro); //根据属性新建一个邮件会话
//s.setDebug(true);
//由邮件会话新建一个消息对象
MimeMessage message = new MimeMessage(s);
//设置邮件
InternetAddress fromAddr = null;
InternetAddress toAddr = null;
try
{
fromAddr = new InternetAddress(451144426+"@qq.com"); //邮件发送地址
message.setFrom(fromAddr); //设置发送地址
toAddr = new InternetAddress("12345367@qq.com"); //邮件接收地址
message.setRecipient(Message.RecipientType.TO, toAddr); //设置接收地址
message.setSubject(title); //设置邮件标题
message.setText(content); //设置邮件正文
message.setSentDate(new Date()); //设置邮件日期
message.saveChanges(); //保存邮件更改信息
Transport transport = s.getTransport("smtp");
transport.connect("smtp.qq.com", "451144426", "密码"); //服务器地址，邮箱账号，邮箱密码
transport.sendMessage(message, message.getAllRecipients()); //发送邮件
transport.close();//关闭
}
catch (Exception e)
{
e.printStackTrace();
flag = false;//发送失败
}
return flag;
}
这是一个javaMail的邮件发送代码，需要一个mail.jar
算是最简单的吧
package cn.job01;
import java.util.Scanner;
public class Lx07 {
public static void choice() {
System.out.println("登陆菜单 ");
System.out.println("1登陆系统");
System.out.println("2退出");
}
static void choice1() {
System.out.println("购物管理系统客户信息");
System.out.println("1显示所有客户信息");
System.out.println("2添加客户信息");
System.out.println("3修改客户信息");
System.out.println("4查询客户信息");
}
static void choice2() {
System.out.println("购物管理系统真情回馈");
System.out.println("1幸运大放送");
System.out.println("2幸运抽奖");
System.out.println("3生日问候");
}
public static void main(String[] args) {
choice();
Scanner input = new Scanner(System.in);
System.out.println("请输入1or2");
int num = input.nextInt();
switch (num) {
case 1:
System.out.println("主菜单");
System.out.println("1客户信息管理");
System.out.println("2购物结算");
System.out.println("3真情回馈");
System.out.println("4注销");
break;
}
System.out.println("选择输入数字");
int num1 = input.nextInt();
switch (num1) {
case 1:
choice1();
break;
case 2:
System.out.println("购物结算");
break;
case 3:
choice2();
break;
case 4:
choice();
break;
}
}
}
import java.util.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;
class 商品 extends Panel
{String 代号,名称;int 库存;float 单价;
商品(String 代号,String 名称,int 库存,float 单价)
{this.代号=代号;this.名称=名称;this.库存=库存;this.单价=单价;
}
}
class ShowWin extends JFrame implements ActionListener
{ Hashtable hashtable=null;
JTextField 代号文本框=new JTextField(),
名称文本框=new JTextField(),
库存文本框=new JTextField(),
单价文本框=new JTextField(),
查询文本框=new JTextField(),
查询信息文本框=new JTextField(),
删除文本框=new JTextField();
JButton b_add=new JButton("添加商品"),
b_del=new JButton("删除商品"),
b_xun=new JButton("查询商品"),
b_xiu=new JButton("修改商品"),
b_show=new JButton("显示商品清单");
JTextArea 显示区=new JTextArea(25,10);
ShowWin()
{super("仓库管理窗口");
hashtable=new Hashtable();
Container con=getContentPane();
JScrollPane pane=new JScrollPane(显示区);
显示区.setEditable(false);
JPanel save=new JPanel();
save.setLayout(new GridLayout(8,2));
save.add(new Label("输入代号:"));
save.add(代号文本框);
save.add(new Label("输入名称:"));
save.add(名称文本框);
save.add(new Label("输入库存:"));
save.add(库存文本框);
save.add(new Label("输入单价:"));
save.add(单价文本框);
save.add(new Label("单击添加:"));
save.add(b_add);
save.add(new Label("单击修改:"));
save.add(b_xiu);
save.add(new Label("输入查询代号:"));
save.add(查询文本框);
save.add(new Label("单击查询:"));
save.add(b_xun);
JPanel del=new JPanel();
del.setLayout(new GridLayout(2,2));
del.add(new Label("输入删除的代号:"));
del.add(删除文本框);
del.add(new Label("单击删除:"));
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(查询信息文本框);
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=代号文本框.getText();mingcheng=名称文本框.getText();
kucun=Integer.parseInt(库存文本框.getText());
danjia=Float.valueOf(单价文本框.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=删除文本框.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=查询文本框.getText();
查询信息文本框.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);
查询信息文本框.setText(" 代号："+a.代号+" 名称："+a.名称+" 库存："+a.库存+" 单价："+a.单价);
}
//
else if(e.getSource()==b_xiu)
{ String bb;
bb=代号文本框.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=代号文本框.getText();mingcheng1=名称文本框.getText();
kucun1=Integer.parseInt(库存文本框.getText());
danjia1=Float.valueOf(单价文本框.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)
{ 显示区.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();
显示区.append("商品代号:"+te.代号+" ");
显示区.append("商品名称:"+te.名称+" ");
显示区.append("商品库存:"+te.库存+" ");
显示区.append("商品单价:"+te.单价+" ");
显示区.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);}});
}
}