springboot整合Mail，实现发送邮件功能

àì夳堔傛蜴生んèń 2022-01-20 03:51 297阅读 0赞

**实现邮件发送功能步骤**：

建立springboot项目 ---> 申请qq邮箱授权码 ---> 配置文件 ---> 代码实现

**目录**

一、新建springboot服务

二、申请qq邮箱授权码

三、application.yml 文件配置

四、实现

五、单元测试

--------------------

## 一、新建springboot服务 ##

添加依赖包：

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-mail</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-thymeleaf</artifactId>
            </dependency>

## 二、申请qq邮箱授权码 ##

申请方法：QQ邮箱->设置->账户->POP3/SMTP服务->开启;开启服务后发送短信验证会获得QQ的授权码。

## 三、application.yml 文件配置 ##

spring:
      mail:
        host: smtp.qq.com
        password: #qq授权码
        username: #自己的qq账号
        default-encoding: utf-8

## 四、实现 ##

Java代码：

@Service
    public class MailService {
        @Value("${spring.mail.username}")
        private String from;
    
        @Autowired
        private JavaMailSender sender;
    
        //发送简单邮件
        public void sendMail(String sendTo,String subject,String content) {
            SimpleMailMessage message = new SimpleMailMessage();
            message.setSubject(subject);
            message.setTo(sendTo);
            message.setText(content);
            message.setFrom(from);
    
            sender.send(message);
        }
    
        //发送简单html邮件
        public void sendHtmlMail(String sendTo,String subject,String content) throws MessagingException {
            MimeMessage message = sender.createMimeMessage();
    
            //封装邮件格式内容
            MimeMessageHelper helper = new MimeMessageHelper(message,true);
            helper.setFrom(from);
            helper.setTo(sendTo);
            helper.setSubject(subject);
            helper.setText(content,true);
    
            sender.send(message);
        }
    
        //发送附件邮件，多附件
        public void sendAttachMail(String sendTo, String subject, String content, List<String> filePathList) throws MessagingException {
            MimeMessage message = sender.createMimeMessage();
    
            //封装邮件格式内容
            MimeMessageHelper helper = new MimeMessageHelper(message,true);
            helper.setFrom(from);
            helper.setTo(sendTo);
            helper.setSubject(subject);
            helper.setText(content,true);
    
            //附件
            for (int i = 0; i < filePathList.size(); i++) {
    
                FileSystemResource resource = new FileSystemResource(new File(filePathList.get(i)));
                //获取文件名
                String fileName = resource.getFilename();
                //添加附件
                helper.addAttachment(fileName,resource);
            }
            sender.send(message);
        }
    }

html模板：

![20190610171345809.png][]

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>邮件模板</title>
    </head>
    <body>
        这是一个验证邮件，点击下面的链接注册
    <a href="#" th:href="@{http://www.baidu.com/{id}(id=${id})}">激活账号</a>
    
    </body>
    </html>

## 五、单元测试 ##

@RunWith(SpringRunner.class)
    @SpringBootTest(classes = DemoApplication.class)//springboot启动类
    public class MailServiceTest {
        @Resource
        MailService service;
    
        @Resource
        TemplateEngine templateEngine;
    
        //发送简单邮件    
        @Test
        public void sendMail() {
            service.sendMail("接收方的邮箱地址","邮件标题","邮件内容");
        }
    
    
        //发送多附件邮件
        @Test
        public void sendAttachMail() throws MessagingException {
            List<String> fileList = new ArrayList<>();
            fileList.add("你的附件地址1");
            fileList.add("你的附件地址2");
            StringBuffer sb = new StringBuffer();
            sb.append("<h1>我的多附件邮件</h1>");
            sb.append("<p>附件1</p>");
            sb.append("<p>附件2</p>");
            service.sendAttachMail("接收方的邮箱地址","我的第一封附件邮件。。",sb.toString(),fileList);
        }
    
        //通过邮件模板发送邮件
        @Test
        public void testTemplates() throws MessagingException {
            Context context = new Context();
            context.setVariable("id","220");
    
            String content = templateEngine.process("emailTemplate",context);
    
            service.sendHtmlMail("接收方的邮箱地址","模板邮件22",content);
        }
    }

[20190610171345809.png]: /images/20220120/402b8af48ab245789d9d505061e26026.png