package com.itheima.service;

import java.io.File;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;

@Service
public class SendEmailService {

    @Autowired
    private JavaMailSenderImpl mailSender;

    @Value("${spring.mail.username}")
    private String from;

    /**
     * 发送纯文本邮件
     * 
     * @param to      收件人地址
     * @param subject 邮件标题
     * @param text    邮件内容
     */
    public void sendSimpleEmail(String to, String subject, String text) {
        // 定制纯文本邮件信息SimpleMailMessage
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject(subject);
        message.setText(text);
        try {
            // 发送邮件
            mailSender.send(message);
            System.out.println("纯文本邮件发送成功");
        } catch (MailException e) {
            System.out.println("纯文本邮件发送失败 " + e.getMessage());
            e.printStackTrace();
        }
    }

    /**
     * 发送复杂邮件（包括静态资源和附件）
     * 
     * @param to       收件人地址
     * @param subject  邮件标题
     * @param text     邮件内容
     * @param filePath 附件地址
     * @param rscId    静态资源唯一标识
     * @param rscPath  静态资源地址
     */
    public void sendComplexEmail(String to, String subject, String text, String filePath, String rscId,
            String rscPath) {
        // 定制复杂邮件信息MimeMessage
        MimeMessage message = mailSender.createMimeMessage();
        try {
            // 使用MimeMessageHelper帮助类，并设置multipart多部件使用为true
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(text, true);
            // 设置邮件静态资源
            FileSystemResource res = new FileSystemResource(new File(rscPath));
            helper.addInline(rscId, res);
            // 设置邮件附件
            FileSystemResource file = new FileSystemResource(new File(filePath));
            String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
            helper.addAttachment(fileName, file);
            // 发送邮件
            mailSender.send(message);
            System.out.println("复杂邮件发送成功");
        } catch (MessagingException e) {
            System.out.println("复杂邮件发送失败 " + e.getMessage());
            e.printStackTrace();
        }
    }
}
package com.itheima;

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 com.itheima.service.SendEmailService;

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class ApplicationTest {

    @Autowired
    private SendEmailService sendEmailService;

    @Test
    public void sendSimpleMailTest() {
        String to = "XXXXXXXXX@qq.com";
        String subject = "【纯文本邮件】标题";
        String text = "Spring Boot纯文本邮件发送内容测试.....";
        // 发送简单邮件
        sendEmailService.sendSimpleEmail(to, subject, text);
    }

    @Test
    public void sendComplexEmailTest() {
        String to = "XXXXXXX1@qq.com";
        String subject = "【复杂邮件】标题";
        // 定义邮件内容
        StringBuilder text = new StringBuilder();
        text.append("<html><head></head>");
        text.append("<body><h1>祝大家元旦快乐！</h1>");
        // cid为固定写法，rscId指定一个唯一标识
        String rscId = "img001";
        text.append("<img src='cid:" + rscId + "'/></body>");
        text.append("</html>");
        // 指定静态资源文件和附件路径
        String rscPath = "F:\\email\\newyear.jpg";
        String filePath = "F:\\email\\元旦放假注意事项.docx";
        // 发送复杂邮件
        sendEmailService.sendComplexEmail(to, subject, text.toString(), filePath, rscId, rscPath);
    }
}