MVC模式下向qq邮箱发送邮件

　　　　将已经保存在数据库中的密码通过邮件发送到qq邮箱中。用的ssm框架，其中的config文件要先配置好。

　　　　用到的jar包有gson-2.2.1.jar，gson.jar，mail.jar，activation.jar

　　1.entity类(WmUser.java)

public class WmUser {
    private String userName;
    private String userPsw;
    private String email;
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserPsw() {
        return userPsw;
    }
    public void setUserPsw(String userPsw) {
        this.userPsw = userPsw;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }

    public WmUser( String userName, String userPsw,
             String email) {
        super();
        this.userName = userName;
        this.userPsw = userPsw;
        this.email = email;
    }
    public WmUser() {
        super();
        // TODO Auto-generated constructor stub
    }

}

2.dao层

　　　　UserMapper.java，是一个接口

public interface UserMapper {
    //根据用户名和邮箱查找用户密码
    public List<WmUser> findAllUser(WmUser wmUser);
}

　　　　UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.etc.dao.UserMapper" >
    <!-- 查找密码 -->
    <select id="findAllUser" parameterType="com.etc.entity.WmUser" resultType="com.etc.entity.WmUser" >
        select userPsw from wm_user    where userName=#{userName} and email=#{email}
    </select>

</mapper>

3.Biz层

　　UserBiz.java(接口）

public interface UserBiz {
        //找回密码
        public List<WmUser> findAllUser(WmUser wmUser);
}

　　UserBizImpl.java

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import com.etc.biz.UserBiz;
import com.etc.dao.UserMapper;
import com.etc.entity.WmUser;

public class UserBizImpl implements UserBiz {
    @Autowired
    UserMapper userMapper;

    //查找密码
    public List<WmUser> findAllUser(WmUser wmUser) {
        List<WmUser> user=userMapper.findAllUser(wmUser);
        return user;
    }
    }

4.controller层

import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message.RecipientType;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.etc.biz.UserBiz;
import com.etc.entity.WmUser;
import com.google.gson.Gson;

@Controller
public class UserController {
    private static final Logger logger=LoggerFactory.getLogger(CompanyController.class);
    private static  List<WmUser> list = new ArrayList<WmUser>();
    @Autowired
    UserBiz userBiz;

    //修改密码
        @RequestMapping("/modPsw.action")
        public void modPsw(HttpServletRequest request, HttpServletResponse response,WmUser wmUser)
                throws Exception {
            request.setCharacterEncoding("utf-8");
            response.setContentType("application/json;charset=utf-8");
            PrintWriter out = response.getWriter();
            //获取从页面传递过来的用户名和邮箱
            String userName=request.getParameter("userName2");
            String email=request.getParameter("email1");
            wmUser.setUserName(userName);
            wmUser.setEmail(email);
            list=userBiz.findAllUser(wmUser);
            Gson gson = new Gson();
            //获取到从数据库中查询出来的密码
            String str = gson.toJson(list.get(0).getUserPsw());

            //发送邮件
            // 创建Properties 类用于记录邮箱的一些属性
            final Properties props = new Properties();
            // 表示SMTP发送邮件，必须进行身份验证
            props.put("mail.smtp.auth", "true");
            //此处填写SMTP服务器
            props.put("mail.smtp.host", "smtp.qq.com");
            //端口号，QQ邮箱给出了两个端口
            props.put("mail.smtp.port", "587");
            // 此处填写发件人的账号（qq邮箱)
            props.put("mail.user", "发件人邮箱");
            // 此处的密码就是前面说的16位STMP口令
            props.put("mail.password", "在邮箱的账号中STMP授权码");

            // 构建授权信息，用于进行SMTP进行身份验证
            Authenticator authenticator = new Authenticator() {

                protected PasswordAuthentication getPasswordAuthentication() {
                    // 用户名、密码
                    String userName = props.getProperty("mail.user");
                    String password = props.getProperty("mail.password");
                    return new PasswordAuthentication(userName, password);
                }
            };

            //生成系统当前时间
            Date date = new Date(); //format对象是用来以指定的时间格式格式化时间的
            SimpleDateFormat from = new SimpleDateFormat( "yyyy年MM月dd日 HH时mm分ss秒"); //这里的格式可以自己设置
            //format()方法是用来格式化时间的方法
            String times = from.format(date);

            // 使用环境属性和授权信息，创建邮件会话
            Session mailSession = Session.getInstance(props, authenticator);
            // 创建邮件消息
            MimeMessage message = new MimeMessage(mailSession);
            // 设置发件人
            InternetAddress form = new InternetAddress(
                    props.getProperty("mail.user"));
            message.setFrom(form);

            // 设置收件人的邮箱
            InternetAddress to = new InternetAddress("收件人邮箱");
            message.setRecipient(RecipientType.TO, to);

            // 设置邮件标题
            message.setSubject("修改密码");

            // 设置邮件的内容体
            message.setContent("尊敬的"+userName+"用户，您好！\r\n您在"+times+"提交找回密码请求,您的新密码为"+str+"，请您登录后重新修改密码。\n如果您没有进行过找回密码的操作，请不要进行任何操作，并删除此邮件。谢谢！", "text/html;charset=UTF-8");

            // 最后当然就是发送邮件啦
            Transport.send(message);

        }
}

5.页面设置（denglu.jsp）

        <form action="modPsw.action" method="post">
            <table>
                 <tr>
                    <td>用户名：</td>
                    <td><input type="text" id="userName2" name="userName2">
                    </td>
                </tr>
                <tr>
                    <td>邮箱:</td>
                    <td><input type="text" id="email1" name="email1"/></td>
                </tr>
                <tr>
                    <td colspan="2"><input type="button" value="返回">
                    <input type="submit" value="找回密码">
                    </td>
                </tr>
            </table>
        </form>