解决jdk1.8中发送邮件失败（handshake_failure）问题

暑假在家做一个类似知乎的问答型网站（代码可见：Github/wenda 喜欢的可以给个star或者自己fork然后修改，目前功能还未很完善），其中有一个站内邮件通知系统（这里简单的讲一个例子：如果用户登录的时候出现异常，那么就会通过邮件发送通知用户）。然而却碰到一个问题。问题错误信息如下：

发送邮件失败Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465;
nested exception is: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure. Failed messages: javax.mail. MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 465;
nested exception is: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure

自己在将错误信息代码google了一下，找了很久发现很多解决方案，包括stackoverflow上的一些解决方案，但还是没用。然后呢用百度试了下，结果在第一条是开源中国的一篇博客:javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure。

百度出来的结果

点进去是这样的：（如下图）

开源中国

正确解决方式

结果就是：这个问题是jdk导致的，jdk1.8里面有一个jce的包，安全性机制导致的访问https会报错，官网上有替代的jar包，如果替换掉就可以了。问题的解决方法还可以就是在整个项目中把你的jdk换成是1.7去，同样也可以解决这个我问题。这两个jar包的下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

包下载

然后下载之后，把这个压缩文件解压，得到两个jar包去覆盖jdk安装目录下的jre\lib\security\下相同的jar包就能解决java8的邮件发送问题。接着用QQ邮箱我亲测有用，但是要注意一点就是：开启SMTP服务后要记得将你的16位授权码作为你的qq邮箱登录密码。

MailSender.java中mailSender.setPassword("16位授权码");
mailSender.setHost("smtp.qq.com");
mailSender.setPort(465);

开启服务注意的地方

16位授权码

下面把完整代码发布出来：
1. LoginExceptionHandler.java

package com.nowcoder.async.handler;

import com.nowcoder.async.EventHandler;
import com.nowcoder.async.EventModel;
import com.nowcoder.async.EventType;
import com.nowcoder.util.MailSender;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by 10412 on 2016/8/10.
 */
@Component
public class LoginExceptionHandler implements EventHandler
{
    @Autowired
    MailSender mailSender;


    @Override
    public void doHandle(EventModel model) {
        // xxxx判断发现这个用户登陆异常
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("username", model.getExt("username"));
        mailSender.sendWithHTMLTemplate(model.getExt("email"), "登陆IP异常", "mails/login_exception.html", map);
    }

    @Override
    public List<EventType> getSupportEventTypes() {
        return Arrays.asList(EventType.LOGIN);
    }
}

2. LoginController.java

package com.nowcoder.controller;

import com.nowcoder.async.EventModel;
import com.nowcoder.async.EventProducer;
import com.nowcoder.async.EventType;
import com.nowcoder.service.UserService;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

/**
 * Created by 10412 on 2016/7/2.
 */

@Controller
public class LoginController {
    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    UserService userService;

    @Autowired
    EventProducer eventProducer;

    @RequestMapping(path = {"/reg/"}, method = {RequestMethod.POST})
    public String reg(Model model, @RequestParam("username") String username,
                      @RequestParam("password") String password,
                      @RequestParam("next") String next,
                      @RequestParam(value="http://www.mamicode.com/rememberme", defaultValue = "http://www.mamicode.com/false") boolean rememberme,
                      HttpServletResponse response) {
        try {
            Map<String, Object> map = userService.register(username, password);
            if (map.containsKey("ticket")) {
                Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
                cookie.setPath("/");
                if (rememberme) {
                    cookie.setMaxAge(3600*24*5);
                }
                response.addCookie(cookie);
                if (StringUtils.isNotBlank(next)) {
                    return "redirect:" + next;
                }
                return "redirect:/";
            } else {
                model.addAttribute("msg", map.get("msg"));
                return "login";
            }

        } catch (Exception e) {
            logger.error("注册异常" + e.getMessage());
            model.addAttribute("msg", "服务器错误");
            return "login";
        }
    }

    @RequestMapping(path = {"/reglogin"}, method = {RequestMethod.GET})
    public String regloginPage(Model model, @RequestParam(value = "http://www.mamicode.com/next", required = false) String next) {
        model.addAttribute("next", next);
        return "login";
    }

    @RequestMapping(path = {"/login/"}, method = {RequestMethod.POST})
    public String login(Model model, @RequestParam("username") String username,
                        @RequestParam("password") String password,
                        @RequestParam(value="http://www.mamicode.com/next", required = false) String next,
                        @RequestParam(value="http://www.mamicode.com/rememberme", defaultValue = "http://www.mamicode.com/false") boolean rememberme,
                        HttpServletResponse response) {
        try {
            Map<String, Object> map = userService.login(username, password);
            if (map.containsKey("ticket")) {
                Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
                cookie.setPath("/");
                if (rememberme) {
                    cookie.setMaxAge(3600*24*5);
                }
                response.addCookie(cookie);

                eventProducer.fireEvent(new EventModel(EventType.LOGIN)
                        .setExt("username", username).setExt("email", "***@qq.com")
                        .setActorId((int)map.get("userId")));

                if (StringUtils.isNotBlank(next)) {
                    return "redirect:" + next;
                }
                return "redirect:/";
            } else {
                model.addAttribute("msg", map.get("msg"));
                return "login";
            }

        } catch (Exception e) {
            logger.error("登陆异常" + e.getMessage());
            return "login";
        }
    }

    @RequestMapping(path = {"/logout"}, method = {RequestMethod.GET, RequestMethod.POST})
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);
        return "redirect:/";
    }

}

3. EventHandler.java

package com.nowcoder.async;

import java.util.List;

/**
 * Created by 10412 on 2016/8/10.
 */
public interface EventHandler
{
    void doHandle(EventModel model);

    List<EventType> getSupportEventTypes();

}

4. MailSender.java

package com.nowcoder.util;

import org.apache.velocity.app.VelocityEngine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.springframework.ui.velocity.VelocityEngineUtils;

import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.util.Map;
import java.util.Properties;

/**
 * Created by 10412 on 2016/8/10. // ***@qq.com   wnppafhsbrcgbfbh（16位授权码）
 */
@Service
public class MailSender implements InitializingBean {
    private static final Logger logger = LoggerFactory.getLogger(MailSender.class);
    private JavaMailSenderImpl mailSender;

    @Autowired
    private VelocityEngine velocityEngine;

    public boolean sendWithHTMLTemplate(String to, String subject, String template, Map<String, Object> model)
    {
        try {
            String nick = MimeUtility.encodeText("***");
            InternetAddress from = new InternetAddress(nick + "<***@qq.com>");
            MimeMessage mimeMessage = mailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage);
            String result = VelocityEngineUtils
                    .mergeTemplateIntoString(velocityEngine, template, "UTF-8", model);
            mimeMessageHelper.setTo(to);
            mimeMessageHelper.setFrom(from);
            mimeMessageHelper.setSubject(subject);
            mimeMessageHelper.setText(result, true);
            mailSender.send(mimeMessage);
            return true;
        } catch (Exception e) {
            logger.error("发送邮件失败" + e.getMessage());
            return false;
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        mailSender = new JavaMailSenderImpl();
        mailSender.setUsername("***@qq.com");
        mailSender.setPassword("wnppafhsbrcgbfbh");   //qq邮箱开启smtp服务后使用16位授权码在第三方登录
//        mailSender.setHost("smtp.exmail.qq.com");
        mailSender.setHost("smtp.qq.com");
        mailSender.setPort(465);

//        mailSender.setHost("smtp.163.com");      //163邮箱
//        mailSender.setPort(25);
        mailSender.setProtocol("smtps");
        mailSender.setDefaultEncoding("utf8");
        Properties javaMailProperties = new Properties();
        javaMailProperties.put("mail.smtp.ssl.enable", true);
        //javaMailProperties.put("mail.smtp.auth", true);
        //javaMailProperties.put("mail.smtp.starttls.enable", true);
        mailSender.setJavaMailProperties(javaMailProperties);
    }
}

5. login_exception.html 发送消息模板（可自定义）

你好$username，你的登陆有问题!

一切都好了，运行。登录。发送邮件过来了。

邮件发过来了

总结来说：这个错误就是jdk1.8中的一个jce的包，安全性机制导致访问https会报错。