使用telnet客户端smtp和pop3协议实现邮件收发

package com.menu; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.ObjectOutputStream; import java.io.PrintStream; import java.net.InetAddress; import java.net.Socket; import java.net.UnknownHostException; import java.util.ArrayList; import java.util.List; import java.util.Map; import com.bean.User; import com.init.UserInit; import com.once.Once; import com.util.Util; public class SelectMenu implements Runnable{ Socket client; PrintStream ps; BufferedReader br; Once once=Once.getOnce(); User user=new User(); public SelectMenu(Socket client){ this.client=client; try { ps=new PrintStream(client.getOutputStream()); br=new BufferedReader(new InputStreamReader(client.getInputStream())); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void run() { // TODO Auto-generated method stub Util.println(ps, "************************欢迎进入邮件系统************************"); while(true){ Util.println(ps, "请选择：1、登录\t2、注册\t3、修改密码\t4找回密码"); String menu=Util.getInput(br); if(menu.equals("1")){ login(); }else if(menu.equals("2")){ addUser(); }else if(menu.equals("3")){ changePass(); }else if(menu.equals("4")){ getPass(); }else{ Util.println(ps, "请重新选择操作！"); } } } public void login(){ Util.println(ps, "请输入你的用户名："); String name=Util.getInput(br); if(once.getUserMap().containsKey(name)){ Util.println(ps, "请输入密码："); String psss=Util.getInput(br); String pass1=once.getUserMap().get(name).getUserPass(); if(pass1.equals(psss)){ if(!once.getPsMap().containsKey(name)){ try { Util.println(ps, name+" "+Util.getTime()+"在"+InetAddress.getLocalHost().getHostAddress()+"登录成功！"); } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } once.getPsMap().put(name, ps); SelectMenu2 select=new SelectMenu2(); select.selectMenu(ps, br); }else{ Util.println(ps, "不能重复登录！"); } }else{ Util.println(ps, "密码输入错误，请重新输入！"); } }else{ ps.println("你输入的用户不存在"); } } //注册 public void addUser(){ Util.println(ps, "请输入你的用户名："); String name=Util.getInput(br); if(once.getUserMap().containsKey(name)){ Util.println(ps, "该用户已存在"); }else{ user.setUserName(name); Util.println(ps, "该用户名可用，请输入密码："); String pass=Util.getInput(br); user.setUserPass(pass); Util.println(ps, "请输入你的密保问题："); String question=Util.getInput(br); user.setUserQuestion(question); Util.println(ps, "请输入你的密保答案："); String answer=Util.getInput(br); user.setUserAnswer(answer); once.getUserMap().put(name, user); writeToFile(once.getUserMap()); Util.println(ps, "注册成功！"); List<File> list=new ArrayList<File>(); once.getMailMap().put(name, list); //写入文件中 Util.writetomail(); } } //修改密码 public void changePass(){ Util.println(ps, "请输入用户名："); String name=Util.getInput(br); if(once.getUserMap().containsKey(name)){ Util.println(ps, "请输入原密码："); String pass= Util.getInput(br); String pass1=once.getUserMap().get(name).getUserPass(); if(pass.equals(pass1)){ Util.println(ps, "请输入新密码："); String pass2=Util.getInput(br); Util.println(ps, "请再次输入新密码以便确认："); String pass3=Util.getInput(br); if(pass2.equals(pass3)){ once.getUserMap().get(name).setUserPass(pass2); writeToFile(once.getUserMap()); Util.println(ps, "密码修改成功！"); }else{ Util.println(ps, "两次密码输入不一致！"); } }else{ Util.println(ps, "原密码输入错误！"); } }else{ Util.println(ps, "你输入的用户名不存在！"); } } //找回密码 public void getPass(){ Util.println(ps, "请输入用户名："); String name=Util.getInput(br); if(once.getUserMap().containsKey(name)){ Util.println(ps, "你的密保问题是："+once.getUserMap().get(name).getUserQuestion()); Util.println(ps, "请输入你的密保答案："); String answer=Util.getInput(br); if(answer.equals(once.getUserMap().get(answer).getUserAnswer())){ Util.println(ps, "恭喜你，回答正确，你的密码是："+once.getUserMap().get(name).getUserPass()); }else{ Util.println(ps, "你输入的密保答案错误！"); } }else{ Util.println(ps, "你输入的用户不存在！"); } } //把注册的信息写入文件 public void writeToFile(Map<String, User> userMap){ File file=new File(Util.USERPATH); ObjectOutputStream oos; try { oos = new ObjectOutputStream(new FileOutputStream(file)); oos.writeObject(userMap); oos.flush(); oos.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }