25、springboot发送邮件

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虽然现在短信验证已经最流行也是最常用的验证方式；但是邮件验证还是必不可少，依然是网站的必备功能之一。什么注册验证，忘记密码或者是给用户发送营销信息都是可以使用邮件发送功能的。最早期使用JavaMail的相关api来进行发送邮件的功能开发，后来spring整合了JavaMail的相关api推出了JavaMailSender更加简化了邮件发送的代码编写，现在springboot对此进行了封装就有了现在的spring-boot-starter-mail。

1、 新建项目sc-mail，对应的pom.xml文件如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>spring-cloud</groupId>
	<artifactId>sc-mail</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>sc-mail</name>
	<url>http://maven.apache.org</url>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.4.RELEASE</version>
	</parent>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>

		</dependencies>
	</dependencyManagement>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>

	<dependencies>

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


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

	</dependencies>
</project>

2、 新建配置文件application.yml

spring:
  application:
    name: sc-mail
  mail:
    host: smtp.qq.com #邮箱服务器地址
    port: 465
    username: [email protected] #用户名
    password: vfcqhwsnnwugbhcx #密码 （改成自己的密码）
    default-encoding: UTF-8
    properties:
      mail:
        smtp:
          ssl:
            enable:
              true

3、 新建邮件发送服务类

package sc.mail.service.impl;

import java.io.File;

import javax.mail.internet.MimeMessage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
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 sc.mail.service.MailService;

@Service
public class MailServiceImpl implements MailService {

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

	@Autowired
	private JavaMailSender mailSender;

	/**
	 * 文本
	 * @param from
	 * @param to
	 * @param subject
	 * @param content
	 */
	@Override
	public void sendSimpleMail(String from, String to, String subject, String content) {
		SimpleMailMessage message = new SimpleMailMessage();
		message.setFrom(from);
		message.setTo(to);
		message.setSubject(subject);
		message.setText(content);
		try {
			mailSender.send(message);
			logger.info("simple mail had send。");
		} catch (Exception e) {
			logger.error("send mail error", e);
		}
	}

	/**
	 * @param from
	 * @param to
	 * @param subject
	 * @param content
	 */
	public void sendTemplateMail(String from, String to, String subject, String content) {
	    MimeMessage message = mailSender.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);
	        mailSender.send(message);
	        logger.info("send template success");
	    } catch (Exception e) {
	        logger.error("send template eror", e);
	    }
	}
	
	
	/**
	 * 附件
	 * 
	 * @param from
	 * @param to
	 * @param subject
	 * @param content
	 * @param filePath
	 */
	public void sendAttachmentsMail(String from, String to, String subject, String content, String filePath){
	    MimeMessage message = mailSender.createMimeMessage();
	    try {
	        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);
	        mailSender.send(message);
	        logger.info("send mail with attach success。");
	    } catch (Exception e) {
	        logger.error("send mail with attach success", e);
	    }
	}
	
	
	/**
	 * 发送内嵌图片
	 * 
	 * @param from
	 * @param to
	 * @param subject
	 * @param content
	 * @param imgPath
	 * @param imgId
	 */
	public void sendInlineResourceMail(String from, String to, String subject, String content,
			String imgPath, String imgId){
	    MimeMessage message = mailSender.createMimeMessage();
	    try {
	        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(imgPath));
	        helper.addInline(imgId, res);
	        mailSender.send(message);
	        logger.info("send inner resources success。");
	    } catch (Exception e) {
	        logger.error("send inner resources fail", e);
	    }
	}

}

4、 新建测试类

package sc.mail;

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 sc.mail.service.MailService;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MailSendTest {

	@Autowired
	private MailService mailService;

	@Test
	public void sendSimpleMailTest() {
		mailService.sendSimpleMail("[email protected]", "[email protected]", 
				"sendSimpleMailTest", "sendSimpleMailTest from [email protected]");
	}

	@Test
	public void sendTemplateMailTest() {
		String html = "<html><body>"
				+ " <div> "
				+ "    sendTemplateMailTest from [email protected] </br>"
				+ "    <b>这是模板邮件</b>"
				+ "</div>"
				+ "</body></html>";
		mailService.sendTemplateMail("[email protected]", "[email protected]", 
				"sendTemplateMailTest", html);
	}

	@Test
	public void sendAttachmentsMailTest() {
		String filePath = "D:\\springcloudws\\sc-mail\\src\\main\\java\\sc\\mail\\service\\impl\\MailServiceImpl.java";
		mailService.sendAttachmentsMail("[email protected]", "[email protected]", 
				"sendAttachmentsMailTest", "sendAttachmentsMailTest from [email protected]", filePath);
	}
	
	@Test
	public void sendInlineResourceMailTest() {
		String imgId = "img1";
		
		String content = "<html><body>"
				+ "sendInlineResourceMailTest：<img src=\'cid:" + imgId + "\' >"
						+ "</body></html>";
		
		String imgPath = "D:\\springcloudws\\sc-mail\\src\\main\\resources\\20181015223228.jpg";
		
		mailService.sendInlineResourceMail("[email protected]", "[email protected]", 
				"sendAttachmentsMailTest", content, imgPath, imgId);
	}

}

5、 运行测试类验证是否发送邮件成功
登录[email protected]邮箱

简单邮件

模板邮件

附件邮件

内嵌图片邮件