Java 邮件发送实现

记录下邮件发送的实现，方便初学者参考，实现方式多种多样，本文采用的是SpringBoot架构
引入依赖

       
            org.springframework.boot
            spring-boot-starter-mail
        

package test;

import test.BusinessException;
import test.ErrorCodeEnum;
import test.TerminalEmailDTO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import javax.mail.MessagingException;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Date;
import java.util.List;


@Service
@Slf4j
public class MailServiceImpl {

    @Autowired
    private JavaMailSender mailSender;

    
    public void sendEmailTest(TestEmailDTO emailDTO) throws BusinessException {
        log.info("邮件发送 emailDTO:{}", emailDTO);
        if(null==emailDTO|| StringUtils.isBlank(emailDTO.getSubject())){
            throw new BusinessException(-1,"发送邮件主题不能为空");
        }

        if(StringUtils.isBlank(emailDTO.getContent())){
             throw new BusinessException(-1,"发送邮件内容不能为空");
        }

        if(null==emailDTO.getToAddress() || emailDTO.getToAddress().size()<1){
             throw new BusinessException(-1,"接收人地址不能为空");
        }

        sendEmail(emailDTO);
    }

    
    public void sendEmail(TestEmailDTO emailDTO)throws BusinessException{
        log.info("调用发送邮件工具方法=== emailDTO:{}", emailDTO);
        try{
            MimeMessage mimeMessage = mailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
            mimeMessageHelper.setFrom(emailDTO.getFromAddress());
            mimeMessageHelper.setTo(getAddress(emailDTO.getToAddress()));
            mimeMessageHelper.setSentDate(new Date());
            
            InternetAddress[] bccArray = getAddress(emailDTO.getBccAddress());
            if(bccArray != null) {
                mimeMessageHelper.setBcc(bccArray);
            }
            InternetAddress[] ccArray = getAddress(emailDTO.getCcAddress());
            if (ccArray != null) {
                mimeMessageHelper.setCc(ccArray);
            }
            //邮件主题
            mimeMessageHelper.setSubject(emailDTO.getSubject());
            //邮件正文内容
            mimeMessageHelper.setText(emailDTO.getContent());

            mailSender.send(mimeMessage);
        } catch (MessagingException e) {
            log.error("发送邮件失败--邮件信息错误 eMsg:{}", e.getMessage());
        } catch (MailException e) {
            log.error("发送邮件失败--邮件格式错误或邮箱无效 eMsg:{}", e.getMessage());
        }catch (Exception e){
            log.error("发送邮件失败 error:{}", e.getMessage());
            throw new BusinessException(-1,"发送邮件失败--"+e.getMessage());
        }

    }

    
    private InternetAddress[] getAddress(List strList) throws AddressException {
        InternetAddress[] internetAddress = null;
        if(!CollectionUtils.isEmpty(strList)) {
            internetAddress = new InternetAddress[strList.size()];
            for(int i = 0 ; i < strList.size(); i++ ) {
                internetAddress[i] = new InternetAddress(strList.get(i));
            }
        }
        return internetAddress;
    }

}