何在Spring boot中配置和发送邮件呢，今天我们就以QQ邮件为例，给大家说一下在spring Boot中发送，包括简单邮件，html格式邮件，包含附件的邮件，和发送图片内容的邮件

spring boot配置邮件

1.配置邮件

1.1配置maven依赖

1.2在application.properties中配置发送邮件的用户名 密码等信息

1.3配置QQ邮箱的IMAP/SMTP信息，来配置spring.mail.password的信息

1.3.1登录QQ邮箱，打开设置

1.3.2 点击设置后，点击账号，找到以下模块，点击开启，就可以生成授权码

1.4编写Service

package com.team.base.service;

import lombok.extern.java.Log;

import lombok.extern.log4j.Log4j;

import lombok.extern.slf4j.Slf4j;

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

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

import org.springframework.core.io.FileSystemResource;

import org.springframework.mail.SimpleMailMessage;

import org.springframework.mail.javamail.JavaMailSender;

import org.springframework.mail.javamail.MimeMessageHelper;

import org.springframework.stereotype.Service;

import javax.mail.MessagingException;

import javax.mail.internet.MimeMessage;

import java.io.File;

/**

* @com.team.base.service

* @fenghaiju

* @2018/3/19-16:46

* @springBootBase

**/

@Service

@Slf4j

public class MailService {

@Autowired

private JavaMailSender sender;

@Value("${spring.mail.username}")

private String from;

/**

* 发送纯文本的简单邮件

* @param to

* @param subject

* @param content

*/

public void sendSimpleMail(String to, String subject, String content){

SimpleMailMessage message = new SimpleMailMessage();

message.setFrom(from);

message.setTo(to);

message.setSubject(subject);

message.setText(content);

try {

sender.send(message);

log.info("简单邮件已经发送。");

} catch (Exception e) {

log.error("发送简单邮件时发生异常！",e);

}

}

/**

* 发送html格式的邮件

* @param to

* @param subject

* @param content

*/

public void sendHtmlMail(String to, String subject, String content){

MimeMessage message = sender.createMimeMessage();

try {

//true表示需要创建一个multipart message

MimeMessageHelper helper = new MimeMessageHelper(message, true);

helper.setFrom(from);

helper.setTo(to);

helper.setSubject(subject);

helper.setText(content, true);

sender.send(message);

log.info("html邮件已经发送。");

} catch (MessagingException e) {

log.error("发送html邮件时发生异常！",e);

}

}

/**

* 发送带附件的邮件

* @param to

* @param subject

* @param content

* @param filePath

*/

public void sendAttachmentsMail(String to, String subject, String content, String filePath){

MimeMessage message = sender.createMimeMessage();

try {

//true表示需要创建一个multipart message

MimeMessageHelper helper = new MimeMessageHelper(message, true);

helper.setFrom(from);

helper.setTo(to);

helper.setSubject(subject);

helper.setText(content, true);

FileSystemResource file = new FileSystemResource(new File(filePath));

String fileName = filePath.substring(filePath.lastIndexOf(File.separator));

helper.addAttachment(fileName, file);

sender.send(message);

log.info("带附件的邮件已经发送。");

} catch (MessagingException e) {

log.error("发送带附件的邮件时发生异常！",e);

}

}

/**

* 发送嵌入静态资源（一般是图片）的邮件

* @param to

* @param subject

* @param content 邮件内容，需要包括一个静态资源的id，比如：<img src=\"cid:rscId01\" >

* @param rscPath 静态资源路径和文件名

* @param rscId 静态资源id

*/

public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){

MimeMessage message = sender.createMimeMessage();

try {

//true表示需要创建一个multipart message

MimeMessageHelper helper = new MimeMessageHelper(message, true);

helper.setFrom(from);

helper.setTo(to);

helper.setSubject(subject);

helper.setText(content, true);

FileSystemResource res = new FileSystemResource(new File(rscPath));

helper.addInline(rscId, res);

sender.send(message);

log.info("嵌入静态资源的邮件已经发送。");

} catch (MessagingException e) {

log.error("发送嵌入静态资源的邮件时发生异常！",e);

}

}

}

1.5编写Controller

package com.team.base.controller;
import com.team.base.service.MailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * @com.team.base.controller
 * @fenghaiju
 * @2018/3/19-16:51
 * @springBootBase
 **/
@RestController
@RequestMapping("/mail")
public class MailController {
 @Autowired
 private MailService mailService;
 /**
 * 简单发送
 * @return
 */
 @RequestMapping("/sendSimpleMail")
 public ResponseEntity<?> sendSimpleMail(){
 mailService.sendSimpleMail("fenghaiju@sohu.com", "简单邮件", "简单的邮件测试");
 return ResponseEntity.ok(true);
 }
 /**
 * 发送html内容
 * @return
 */
 @RequestMapping("/sendHtmlMail")
 public ResponseEntity<?> sendHtmlMail(){
 mailService.sendHtmlMail("fenghaiju@sohu.com", "html邮件", "<html><body><h3>你好， 这是一封模板邮件!</h3></body></html>");
 return ResponseEntity.ok(true);
 }
 /**
 * 发送附件
 * @return
 */
 @RequestMapping("/sendAttachmentsMail")
 public ResponseEntity<?> sendAttachmentsMail(){
 mailService.sendAttachmentsMail("fenghaiju@sohu.com", "附件邮件", "测试邮件内容","D:\\article\\结尾.txt");
 return ResponseEntity.ok(true);
 }
 /**
 * 发送图片
 * @return
 */
 @RequestMapping("/sendInlineResourceMail")
 public ResponseEntity<?> sendInlineResourceMail(){
 mailService.sendInlineResourceMail("fenghaiju@sohu.com", "发送图片", "<img src=\"cid:rscId01\" >","D:\\article\\架构师.png","rscId01");
 return ResponseEntity.ok(true);
 }
}

1.6测试邮件

1.6.1测试简单邮件

1.6.2 测试Html格式邮件

1.6.3 测试附件邮件

1.6.4 测试图片邮件

2.总结，大家在配置邮件的时候，注意配置文件的空格，否则会出现异常情况