10 分钟实现 Java 发送邮件功能

@Autowired

private JavaMailSenderImpl mailSender;

public void sendMail () throws MessagingException {

SimpleMailMessage simpleMailMessage = new SimpleMailMessage();

simpleMailMessage.setFrom( "admin@163.com" );

simpleMailMessage.setTo( "socks@qq.com" );

simpleMailMessage.setSubject( "Happy New Year" );

simpleMailMessage.setText( "新年快乐！" );

mailSender.send(simpleMailMessage);

MimeMessage mimeMessage = mailSender.createMimeMessage();

MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage);

messageHelper.setFrom( "admin@163.com" );

messageHelper.setTo( "socks@qq.com" );

messageHelper.setSubject( "Happy New Year" );

messageHelper.setText( "新年快乐！" );

messageHelper.addInline( "doge.gif" , new File( "xx/xx/doge.gif" ));

messageHelper.addAttachment( "work.docx" , new File( "xx/xx/work.docx" ));

mailSender.send(mimeMessage);

}

@Configuration

@ConditionalOnProperty (prefix = "spring.mail" , name = "host" )

class MailSenderPropertiesConfiguration {

private final MailProperties properties;

MailSenderPropertiesConfiguration(MailProperties properties) {

this .properties = properties;

}

@Bean

@ConditionalOnMissingBean

public JavaMailSenderImpl mailSender () {

JavaMailSenderImpl sender = new JavaMailSenderImpl();

applyProperties(sender);

return sender;

}

@ConfigurationProperties (prefix = "spring.mail" )

public class MailProperties {

private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;

private String host;

private Integer port;

private String username;

private String password;

private String protocol = "smtp" ;

private Charset defaultEncoding = DEFAULT_CHARSET;

private Map< String , String > properties = new HashMap<>();

}

< dependencies >

< dependency >

< groupId > org.springframework.boot </ groupId >

< artifactId > spring-boot-starter-web </ artifactId >

</ dependency >

< dependency >

< groupId > org.springframework.boot </ groupId >

< artifactId > spring-boot-starter-thymeleaf </ artifactId >

</ dependency >

< dependency >

< groupId > org.springframework.boot </ groupId >

< artifactId > spring-boot-starter-mail </ artifactId >

</ dependency >

< dependency >

< groupId > org.webjars </ groupId >

< artifactId > webjars-locator-core </ artifactId >

</ dependency >

< dependency >

< groupId > org.webjars </ groupId >

< artifactId > jquery </ artifactId >

< version > 3.3.1 </ version >

</ dependency >

< dependency >

< groupId > org.webjars </ groupId >

< artifactId > bootstrap </ artifactId >

< version > 3.3.7 </ version >

</ dependency >

< dependency >

< groupId > org.springframework.boot </ groupId >

< artifactId > spring-boot-devtools </ artifactId >

< scope > runtime </ scope >

</ dependency >

< dependency >

< groupId > org.springframework.boot </ groupId >

< artifactId > spring-boot-starter-test </ artifactId >

< scope > test </ scope >

</ dependency >

</ dependencies >

spring :

mail :

host : smtp. 163 .com #SMTP服务器地址

username : socks #登陆账号

password : 123456 #登陆密码（或授权码）

properties :

from : socks @163 .com #邮件发信人（即真实邮箱）

thymeleaf :

cache : false

prefix : classpath :/views/

servlet :

multipart :

max-file-size : 10 MB #限制单个文件大小

50

MB #限制请求总量

package com.hehe.vo;

public class MailVo {

private String id;

private String from ;

private String to;

private String subject;

private String text;

private Date sentDate;

private String cc;

private String bcc;

private String status;

private String error;

@JsonIgnore

private MultipartFile[] multipartFiles;

}

package com.hehe.service;

@Service

public class   MailService   {

private Logger logger = LoggerFactory.getLogger(getClass());

@Autowired

private JavaMailSenderImpl mailSender;

public MailVo sendMail (MailVo mailVo) {

try {

checkMail(mailVo);

sendMimeMail(mailVo);

return saveMail(mailVo);

} catch (Exception e) {

logger.error( "发送邮件失败:" , e);

mailVo.setStatus( "fail" );

mailVo.setError(e.getMessage());

return mailVo;

}

}

private void checkMail (MailVo mailVo) {

if (StringUtils.isEmpty(mailVo.getTo())) {

throw new RuntimeException( "邮件收信人不能为空" );

}

if (StringUtils.isEmpty(mailVo.getSubject())) {

throw new RuntimeException( "邮件主题不能为空" );

}

if (StringUtils.isEmpty(mailVo.getText())) {

throw new RuntimeException( "邮件内容不能为空" );

}

}

private void sendMimeMail (MailVo mailVo) {

try {

MimeMessageHelper messageHelper = new MimeMessageHelper(mailSender.createMimeMessage(), true );

mailVo.setFrom(getMailSendFrom());

messageHelper.setFrom(mailVo.getFrom());

messageHelper.setTo(mailVo.getTo().split( "," ));

messageHelper.setSubject(mailVo.getSubject());

messageHelper.setText(mailVo.getText());

if (!StringUtils.isEmpty(mailVo.getCc())) {

messageHelper.setCc(mailVo.getCc().split( "," ));

}

if (!StringUtils.isEmpty(mailVo.getBcc())) {

messageHelper.setCc(mailVo.getBcc().split( "," ));

}

if (mailVo.getMultipartFiles() != null ) {

for (MultipartFile multipartFile : mailVo.getMultipartFiles()) {

messageHelper.addAttachment(multipartFile.getOriginalFilename(), multipartFile);

}

}

if (StringUtils.isEmpty(mailVo.getSentDate())) {

mailVo.setSentDate( new Date());

messageHelper.setSentDate(mailVo.getSentDate());

}

mailSender.send(messageHelper.getMimeMessage());

mailVo.setStatus( "ok" );

logger.info( "发送邮件成功：{}->{}" , mailVo.getFrom(), mailVo.getTo());

} catch (Exception e) {

throw new RuntimeException(e);

}

}

private MailVo saveMail (MailVo mailVo) {

return mailVo;

}

public String getMailSendFrom () {

return mailSender.getJavaMailProperties().getProperty( "from" );

}

}

@RestController

public class   MailController   {

@Autowired

private MailService mailService;

@GetMapping ( "/" )

public ModelAndView index () {

ModelAndView mv = new ModelAndView( "mail/sendMail" );

mv.addObject( "from" , mailService.getMailSendFrom());

return mv;

}

@PostMapping ( "/mail/send" )

public MailVo sendMail (MailVo mailVo, MultipartFile[] files) {

mailVo.setMultipartFiles(files);

return mailService.sendMail(mailVo);

}

}

<!DOCTYPE html>

< html xmlns:th = "http://www.thymeleaf.org" >

< head >

< meta charset = "UTF-8" />

< title > 发送邮件 </ title >

< link th:href = "@{/webjars/bootstrap/css/bootstrap.min.css}" rel = "stylesheet" type = "text/css" />

< script th:src = "@{/webjars/jquery/jquery.min.js}" > </ script >

< script th:href = "@{/webjars/bootstrap/js/bootstrap.min.js}" > </ script >

</ head >

< body >

< div class = "col-md-6" style = "margin:20px;padding:20px;border: #E0E0E0 1px solid;" >

< h5 id = "egg" > 祝大家新年快乐！ </ h5 > < img   id = "doge"   src = "http://pics.sc.chinaz.com/Files/pic/faces/3709/7.gif"   alt = "" >

</ marquee >

< form class = "form-horizontal" id = "mailForm" >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件发信人: </ label >

< div class = "col-md-6" >

< input class = "form-control" id = "from" name = "from" th:value = "${from}" readonly = "readonly" >

</ div >

</ div >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件收信人: </ label >

< div class = "col-md-6" >

< input class = "form-control" id = "to" name = "to" title = "多个邮箱使用,隔开" >

</ div >

</ div >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件主题: </ label >

< div class = "col-md-6" >

< input class = "form-control" id = "subject" name = "subject" >

</ div >

</ div >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件内容: </ label >

< div class = "col-md-6" >

< textarea class = "form-control" id = "text" name = "text" rows = "5" > </ textarea >

</ div >

</ div >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件附件: </ label >

< div class = "col-md-6" >

< input class = "form-control" id = "files" name = "files" type = "file" multiple = "multiple" >

</ div >

</ div >

< div class = "form-group" >

< label class = "col-md-2 control-label" > 邮件操作: </ label >

< div class = "col-md-3" >

< a class = "form-control btn btn-primary" onclick = "sendMail()" > 发送邮件 </ a >

</ div >

< div class = "col-md-3" >

< a class = "form-control btn btn-default" onclick = "clearForm()" > 清空 </ a >

</ div >

</ div >

</ form >

< script th:inline = "javascript" >

var appCtx = [[${#request.getContextPath()}]];

function sendMail() {

var formData = new FormData($('#mailForm')[0]);

$.ajax({

url: appCtx + '/mail/send',

type: "POST",

data: formData,

contentType: false,

processData: false,

success: function (result) {

alert(result.status === 'ok' ? "发送成功！" : "你被Doge嘲讽了：" + result.error);

},

error: function () {

alert("发送失败！");

}

});

}

function clearForm() {

$('#mailForm')[0].reset();

}

setInterval(function () {

var total = $('#mq').width();

var width = $('#doge').width();

var left = $('#doge').offset().left;

$('#doge').css('transform', 'rotateY(-360deg)')

}

});

</ script >

</ div >

</ body >

</ html >

421 HL:REP 该IP发送行为异常，存在接收者大量不存在情况，被临时禁止连接。请检查是否有用户发送病毒或者垃圾邮件，并核对发送列表有效性；

421 HL:ICC 该IP同时并发连接数过大，超过了网易的限制，被临时禁止连接。请检查是否有用户发送病毒或者垃圾邮件，并降低IP并发连接数量；

421 HL:IFC 该IP短期内发送了大量信件，超过了网易的限制，被临时禁止连接。请检查是否有用户发送病毒或者垃圾邮件，并降低发送频率；

421 HL:MEP 该IP发送行为异常，存在大量伪造发送域域名行为，被临时禁止连接。请检查是否有用户发送病毒或者垃圾邮件，并使用真实有效的域名发送；

450 MI:CEL 发送方出现过多的错误指令。请检查发信程序；

450 MI:DMC 当前连接发送的邮件数量超出限制。请减少每次连接中投递的邮件数量；

450 MI:CCL 发送方发送超出正常的指令数量。请检查发信程序；

450 RP:DRC 当前连接发送的收件人数量超出限制。请控制每次连接投递的邮件数量；

450 RP:CCL 发送方发送超出正常的指令数量。请检查发信程序；

450 DT:RBL 发信IP位于一个或多个RBL里。请参考http://www.rbls.org/关于RBL的相关信息；

450 WM:BLI 该IP不在网易允许的发送地址列表里；

450 WM:BLU 此用户不在网易允许的发信用户列表里；

451 DT:SPM ,please try again 邮件正文带有垃圾邮件特征或发送环境缺乏规范性，被临时拒收。请保持邮件队列，两分钟后重投邮件。需调整邮件内容或优化发送环境；

451 Requested mail action not taken: too much fail authentication 登录失败次数过多，被临时禁止登录。请检查密码与帐号验证设置；

451 RP:CEL 发送方出现过多的错误指令。请检查发信程序；

451 MI:DMC 当前连接发送的邮件数量超出限制。请控制每次连接中投递的邮件数量；

451 MI:SFQ 发信人在15分钟内的发信数量超过限制，请控制发信频率；

451 RP:QRC 发信方短期内累计的收件人数量超过限制，该发件人被临时禁止发信。请降低该用户发信频率；

451 Requested action aborted: local error in processing 系统暂时出现故障，请稍后再次尝试发送；

500 Error: bad syntaxU 发送的smtp命令语法有误；

550 MI:NHD HELO命令不允许为空；

550 MI:IMF 发信人电子邮件地址不合规范。请参考http://www.rfc-editor.org/关于电子邮件规范的定义；

550 MI:SPF 发信IP未被发送域的SPF许可。请参考http://www.openspf.org/关于SPF规范的定义；

550 MI:DMA 该邮件未被发信域的DMARC许可。请参考http://dmarc.org/关于DMARC规范的定义；

550 MI:STC 发件人当天的连接数量超出了限定数量，当天不再接受该发件人的邮件。请控制连接次数；

550 RP:FRL 网易邮箱不开放匿名转发（Open relay）；

550 RP:RCL 群发收件人数量超过了限额，请减少每封邮件的收件人数量；

550 RP:TRC 发件人当天内累计的收件人数量超过限制，当天不再接受该发件人的邮件。请降低该用户发信频率；

550 DT:SPM 邮件正文带有很多垃圾邮件特征或发送环境缺乏规范性。需调整邮件内容或优化发送环境；

550 Invalid User 请求的用户不存在；

550 User in blacklist 该用户不被允许给网易用户发信；

550 User suspended 请求的用户处于禁用或者冻结状态；

550 Requested mail action not taken: too much recipient  群发数量超过了限额；

552 Illegal Attachment 不允许发送该类型的附件，包括以.uu .pif .scr .mim .hqx .bhx .cmd .vbs .bat .com .vbe .vb .js .wsh等结尾的附件；

552 Requested mail action aborted: exceeded mailsize limit 发送的信件大小超过了网易邮箱允许接收的最大限制；

553 Requested action not taken: NULL sender is not allowed 不允许发件人为空，请使用真实发件人发送；

553 Requested action not taken: Local user only  SMTP类型的机器只允许发信人是本站用户；

553 Requested action not taken: no smtp MX only  MX类型的机器不允许发信人是本站用户；

553 authentication is required  SMTP需要身份验证，请检查客户端设置；

554 DT:SPM 发送的邮件内容包含了未被许可的信息，或被系统识别为垃圾邮件。请检查是否有用户发送病毒或者垃圾邮件；

554 DT:SUM 信封发件人和信头发件人不匹配；

554 IP is rejected, smtp auth error limit exceed 该IP验证失败次数过多，被临时禁止连接。请检查验证信息设置；

554 HL:IHU 发信IP因发送垃圾邮件或存在异常的连接行为，被暂时挂起。请检测发信IP在历史上的发信情况和发信程序是否存在异常；

554 HL:IPB 该IP不在网易允许的发送地址列表里；

554 MI:STC 发件人当天内累计邮件数量超过限制，当天不再接受该发件人的投信。请降低发信频率；

554 MI:SPB 此用户不在网易允许的发信用户列表里；

554 IP in blacklist 该IP不在网易允许的发送地址列表里。