1.springboot发送邮件

springboot特点：
1.约定大于配置
2.简单快速开发
3.强大的生态链
4.springboot和发送邮件

开发过程：1.基础配置2.文本邮件3.html邮件4.邮件模板5.图片邮件6.附件邮件7.异常处理8.邮件系统

登陆https://start.spring.io/设置项目常用配置项

简单文本邮件
1.引入相关jar包2.配置邮箱参数3.封装SimpleMailMessage4.JavaMailSend进行发送

   <!--导入web包和mail包-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

<!--加入thymeleaf包 用于模板邮件-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

在application.properties里面配置
spring.mail.password为授权密码

spring.mail.host=smtp.qq.com
spring.mail.username=*******@qq.com
spring.mail.password=********
spring.mail.default-encoding=UTF-8

service

package com.neo.email.hello;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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;

/**
 * @author  mu
 * @date 2019/6/13
 */
@Service
public class HelloService {
    private Logger logger= LoggerFactory.getLogger(this.getClass());
    @Value("${spring.mail.username}")
    private String from;

    @Autowired
    private JavaMailSender javaMailSender;

    public void sayHello(){
        System.out.println("hello World");
    }

    /**
     * 发送文本邮件
     * @param to  发给谁
     * @param subject 主题
     * @param content 内容
     */
    public void sendSimpleMail(String to,String subject,String content){
        SimpleMailMessage simpleMailMessage=new SimpleMailMessage();
        simpleMailMessage.setTo(to);
        simpleMailMessage.setSubject(subject);
        simpleMailMessage.setText(content);
        simpleMailMessage.setFrom(from);
        javaMailSender.send(simpleMailMessage);

    }

    /**
     * 发送html邮件
     * @param to  发给谁
     * @param subject 主题
     * @param content 内容
     */
    public void sendHtmlMail(String to,String subject,String content) throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper=new MimeMessageHelper(mimeMessage,true);
        helper.setTo(to);
        helper.setSubject(subject);
        helper.setText(content,true);
        helper.setFrom(from);
        javaMailSender.send(mimeMessage);
    }

    /**
     * 发送附件邮件
     * @param to
     * @param subject
     * @param content
     * @param filePath
     * @throws MessagingException
     */
    public void sendAttachMENTMail(String to,String subject,String content,String filePath) throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper=new MimeMessageHelper(mimeMessage,true);
        helper.setTo(to);
        helper.setSubject(subject);
        helper.setText(content,true);
        helper.setFrom(from);
        FileSystemResource fileSystemResource = new FileSystemResource(new File(filePath));
        String filename = fileSystemResource.getFilename();
        helper.addAttachment(filename,fileSystemResource);
        //发送两个附件
        helper.addAttachment(filename+"_second",fileSystemResource);
        javaMailSender.send(mimeMessage);
    }

    /**
     * 发送图片邮件
     * @param to
     * @param subject
     * @param content
     * @param filePath
     * @param id
     * @throws MessagingException
     */
    public void sendInLineResouceMail(String to,String subject,String content,String filePath,String id)  {
        logger.info("发送静态邮件开始，{}，{}，{}，{}，{}",to,subject,content,filePath,id);
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper= null;
        try {
            helper = new MimeMessageHelper(mimeMessage,true);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content,true);
            helper.setFrom(from);
            FileSystemResource fileSystemResource = new FileSystemResource(new File(filePath));
            helper.addInline(id,fileSystemResource);
            javaMailSender.send(mimeMessage);
            logger.error("发送邮件成功");
        } catch (MessagingException e) {
            logger.error("发送邮件失败",e);
        }

    }
}

serviceTest

package com.neo.email.hello;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.annotation.Resource;
import javax.mail.MessagingException;


@RunWith(SpringRunner.class)
@SpringBootTest
public class HelloTest {
    @Resource
    HelloService helloService;

    @Resource
    TemplateEngine templateEngine;


    @Test
    public void  helloWorldTest(){
        helloService.sayHello();
    }

    @Test
    public void sendSimpleMailTest(){
        helloService.sendSimpleMail("mujiachao@binfo-tech.com","文本邮件测试","这是邮件内容");
    }

    @Test
    public void sendHtmlMailTest() throws MessagingException {
        String content="<html>\n"+"<body>\n"+"<h3>这是html邮件</h3>\n"+"</body>\n"+"</html>";
                helloService.sendHtmlMail("mujiachao@binfo-tech.com","html邮件测试",content);
    }

    @Test
    public void sendAttachmentMailTest() throws MessagingException {
        String filePath="C:\\Users\\Administrator\\Desktop\\email.zip";
        helloService.sendAttachMENTMail("mujiachao@binfo-tech.com","文本附件邮箱测试","这是附件邮箱内容",filePath);
    }


    @Test
    public void sendInLineResourceMailTest(){

        String filePath="C:\\Users\\Administrator\\Desktop\\index.jfif";
        String id="mu01";
        String content="<html>\n"+"<body>\n"+"这是有图片的邮件<img src=\'cid:"+id+"\'></img>\n"+"<h3>这是图片邮件</h3></body>\n"+"</html>";
        helloService.sendInLineResouceMail("mujiachao@binfo-tech.com","文本图片邮箱测试",content,filePath,id);
    }

@Test
    public void sendTemplateMailTest() throws MessagingException {
    Context context=new Context();
    context.setVariable("id","000");
    String emailTemplate = templateEngine.process("emailTemplate", context);

    helloService.sendHtmlMail("mujiachao@binfo-tech.com","模板邮件测试",emailTemplate);

}
}

templates下的emailTemplate.html模板
thymeleaf的一个声明 重点--> xmlns:th="http://thymeleaf.org"

<!DOCTYPE html>
<!--thymeleaf的一个声明   重点-->
<html lang="en" xmlns:th="http://thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>邮件模板</title>
</head>
<body>
你好，感谢你的注册，这是一封验证邮件，请点击下面验证码完成注册，谢谢！
<a href="#" th:href="@{http://www.ityouknow.com/register/{id}(id=${id})}">激活账户</a>
</body>
</html>