Spring Boot笔记之邮件（spring-boot-starter-mail）

Spring Boot环境中发送邮件

• pom.xml引入`spring-boot-starter-mail`
• application.yml配置
• 163邮箱
• QQ邮箱
• Gmail邮箱
• 发送邮件
• service实现类
• templates模版
• 测试
• 结语

pom.xml引入spring-boot-starter-mail

Spring Boot2.x集成了mail模块，在dependencies引入这个

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

application.yml配置

spring:
	mail:
    	# 163
    	host: smtp.163.com
    	port:
    	username: yimcarson@163.com
    	password: ************
    	protocol: smtp
    	default-encoding: UTF-8
    	properties:
      		mail.smtp.auth: true
      		mail.smtp.starttls.enable: true
      		mail.smtp.starttls.required: true
      		mail.smtp.socketFactory.port: 465
      		mail.smtp.socketFactory.class: javax.net.ssl.SSLSocketFactory
      		mail.smtp.socketFactory.fallback: false

其中spring.mail.host spring.mail.port spring.mail.username spring.mail.password不同邮箱的配置方法也不同

163邮箱

spring:
	mail:
    		host: smtp.163.com
    		port:
    		username: yimcarson@163.com
    		password: ************

其中spring.mail.port不指定；spring.mail.password不是邮箱密码，需要登录mail.163.com，前往设置 客户端授权密码中获取的一个16个字符的密码，同时允许POP3/SMTP服务。

QQ邮箱

spring:
	mail:
    		host: smtp.qq.com
    		port: 587
    		username: yimcarson@qq.com
    		password: ************

spring.mail.password不是QQ密码，登录mail.qq.com，前往设置 账户 POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务开启POP3/SMTP服务获取一个16个字符的密码

Gmail邮箱

spring:
	mail:
		host: smtp.gmail.com
		port: 465
		username: yimcarson@gmail.com
		password: ****************

spring.mail.password是Gmail的密码，但是要前往Google账户的安全性较低的应用的访问权限中允许不安全应用。

发送邮件

这是一个验证码模版邮件

service实现类

import com.my.demo.project.service.MailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.mail.javamail.MimeMessagePreparator;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.mail.*;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import java.util.Properties;

import java.util.UUID;

@Service

public class MailServiceImpl implements MailService {
<span class="token annotation punctuation">@Autowired</span>
<span class="token keyword">private</span> JavaMailSender mailSender<span class="token punctuation">;</span>

<span class="token comment">/**
 * 用来发送模版邮件
 */</span>
<span class="token annotation punctuation">@Autowired</span>
<span class="token keyword">private</span> TemplateEngine templateEngine<span class="token punctuation">;</span>

<span class="token annotation punctuation">@Value</span><span class="token punctuation">(</span><span class="token string">"${spring.mail.username}"</span><span class="token punctuation">)</span>
<span class="token keyword">private</span> String from<span class="token punctuation">;</span>

<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">send</span><span class="token punctuation">(</span>String to<span class="token punctuation">,</span> String subject<span class="token punctuation">,</span> String text<span class="token punctuation">)</span> <span class="token punctuation">{</span>

//        SimpleMailMessage message = new SimpleMailMessage();

//        message.setFrom(from);

//        message.setTo(to);

//        message.setSubject(subject);

//        message.setText(text);
    Context context <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Context</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    context<span class="token punctuation">.</span><span class="token function">setVariable</span><span class="token punctuation">(</span><span class="token string">"project"</span><span class="token punctuation">,</span> <span class="token string">"demo"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    context<span class="token punctuation">.</span><span class="token function">setVariable</span><span class="token punctuation">(</span><span class="token string">"author"</span><span class="token punctuation">,</span> <span class="token string">"yimcarson"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    context<span class="token punctuation">.</span><span class="token function">setVariable</span><span class="token punctuation">(</span><span class="token string">"code"</span><span class="token punctuation">,</span> text<span class="token punctuation">)</span><span class="token punctuation">;</span>
    String emailContent <span class="token operator">=</span> templateEngine<span class="token punctuation">.</span><span class="token function">process</span><span class="token punctuation">(</span><span class="token string">"mail"</span><span class="token punctuation">,</span> context<span class="token punctuation">)</span><span class="token punctuation">;</span>

    MimeMessage message <span class="token operator">=</span> mailSender<span class="token punctuation">.</span><span class="token function">createMimeMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    MimeMessageHelper helper <span class="token operator">=</span> null<span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{</span>
        helper <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">MimeMessageHelper</span><span class="token punctuation">(</span>message<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        helper<span class="token punctuation">.</span><span class="token function">setFrom</span><span class="token punctuation">(</span>from<span class="token punctuation">)</span><span class="token punctuation">;</span>
        helper<span class="token punctuation">.</span><span class="token function">setTo</span><span class="token punctuation">(</span>to<span class="token punctuation">)</span><span class="token punctuation">;</span>
        helper<span class="token punctuation">.</span><span class="token function">setSubject</span><span class="token punctuation">(</span>subject<span class="token punctuation">)</span><span class="token punctuation">;</span>
        helper<span class="token punctuation">.</span><span class="token function">setText</span><span class="token punctuation">(</span>emailContent<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">MessagingException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    mailSender<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>message<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

}

templates模版

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
	<head>
	    <meta charset="UTF-8">
	    <title>yimcarson</title>
	    <style>
	        body {
	            text-align: center;
	            margin-left: auto;
	            margin-right: auto;
	        }
	        #main {
	            text-align: center;
	            position: absolute;
	        }
	    </style>
	</head>
	<body>
		<div id="main">
	    	<h3>Welcome <span th:text="${project}"></span> -By <span th:text=" ${author}"></span></h3>
	    	Your Verification Code is
	    	<h2><span th:text="${code}"></span></h2>
		</div>
	</body>
</html>

测试

import com.my.demo.Application;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;

import java.util.Date;

import java.util.UUID;

@RunWith(SpringRunner.class)

@SpringBootTest(classes = {Application.class})

public class MailServiceTest {

@Autowired

private MailService mailService;
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">testSend</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
	String to <span class="token operator">=</span> <span class="token string">"yimcarson@qq.com"</span><span class="token punctuation">;</span>
	mailService<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>to<span class="token punctuation">,</span> <span class="token string">"模板邮件"</span><span class="token punctuation">,</span> UUID<span class="token punctuation">.</span><span class="token function">randomUUID</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

}

结语

163 QQ这两个邮箱比较常用，至于Gmail……，如果服务器是阿里云香港或者国外、亚马逊这些的话可以正常使用，否则……，Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1

原文地址：https://blog.csdn.net/yimcarson/article/details/84936440