二、编写处理用户注册处理程序2.1、开发封装用户注册信息的domain
User.java
public class User {
private String username;
private String password;
private String email;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}

2.3、编写处理用户注册的Servlet
package me.gacl.web.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import me.gacl.domain.User;
import me.gacl.service.UserService;
public class RegisterServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{
String username = request.getParameter("username");
String password = request.getParameter("password");
String email = request.getParameter("email");
User user = new User();
user.setEmail(email);
user.setPassword(password);
user.setUsername(username);
System.out.println("把用户信息注册到数据库中");
//用户注册成功之后就使用用户注册时的邮箱给用户发送一封Email
//发送邮件是一件非常耗时的事情，因此这里开辟了另一个线程来专门发送邮件
Sendmail send = new Sendmail(user);
//启动线程，线程启动之后就会执行run方法来发送邮件
send.start();
//注册用户
//new UserService().registerUser(user);
request.setAttribute("message", "恭喜您，注册成功，我们已经发了一封带了注册信息的电子邮件，请查收，如果没有收到，可能是网络原因，过一会儿就收到了！！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
}catch (Exception e) {
e.printStackTrace();
request.setAttribute("message", "注册失败！！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

转自 孤傲苍狼 博客，原文地址: http://www.cnblogs.com/xdp-gacl/p/4220190.html