1.创建springboot项目

2.pom导入依赖

org.springframework.boot spring-boot-starter-mail

3.application.properties配置文件

spring.mail.host=smtp.163.comspring.mail.username=sple_vip@163.com//发件人邮箱，需要开启smtp服务spring.mail.password=ming438434//授权密码，非邮箱的登录密码spring.mail.port=25spring.mail.protocol=smtpspring.mail.default-encoding=UTF-8

发件人邮箱的设置：

邮箱客户端授权码也需要手动开启，设置授权码

4.用户输入自己的邮箱，点击找回，前端页面

html代码：

请输入邮箱

js代码：

$(function () { $("#registbtn").click(function() { var user = { mail:$("#mail").val() } $.ajax({  type: "POST",  url:"/mail.action", contentType: "application/json;", data: JSON.stringify(user), success: function (data) { if(data == "successful"){ alert("已发送至您的邮箱") location.href="/login.html" rel="external nofollow" ; } if (data=="failful") { alert("邮箱错误") } }, error: function (data) {   alert("网络繁忙") }  });  });});

5.点击找回，进入controller层

@RequestMapping("/mail.action")public String mail(@RequestBody User user) { return mailService.sendMail(user);}

service层

@Servicepublic class MailServiceImpl implements MailService{ @Autowired private JavaMailSender javaMailSender; @Autowired private UserMapper userMapper; @Override public String sendMail(User user) { User user2 = mailPwd(user); StringBuilder stringBuilder=new StringBuilder(); stringBuilder.append(""); stringBuilder.append("亲爱的用户"+user2.getAccount()+",您的当前密码是："+user2.getPassword()); stringBuilder.append("
访问百度"); MimeMessage mimeMessage=javaMailSender.createMimeMessage(); //multipart模式 try { MimeMessageHelper mimeMessageHelper=new MimeMessageHelper(mimeMessage, true); mimeMessageHelper.setTo(user.getMail());//收件人邮箱user.getMail() mimeMessageHelper.setFrom("sple_vip@163.com");//发件人邮箱 mimeMessage.setSubject("找回密码"); //启用html mimeMessageHelper.setText(stringBuilder.toString(),true); javaMailSender.send(mimeMessage); return Constent.SUCCESSFUL; } catch (MessagingException e) { e.printStackTrace(); return Constent.FAILFUL; } }  /** * 通过邮箱到数据库查询用户的信息 */ @Override public User mailPwd(User user) { return userMapper.mailPwd(user); } }

dao层

public interface UserMapper { /** * 通过邮箱查询用户信息 */ @Select("SELECT * FROM user WHERE mail = #{mail}") public User mailPwd(User user);}