java发送邮件

 

1，邮件模板

2，代码

2.1)调用方

 /**
     * 发送邮件
     *
     * @param request
     */
    private void sendEmail(BaseRequestModel request, AddressEntity addressEntity) {

        // 发送信息
        Long belongTo = request.getBelongTo();
        CompanyEntity companyEntity = new CompanyEntity();
        companyEntity.setIsDel(DeleteStatusE.USEFUL.getValue());
        companyEntity.setId(belongTo);
        List<CompanyEntity> comList = companyManageMapper.select(companyEntity);
        CompanyEntity entity = null;
        if (comList != null && !comList.isEmpty()) {
            entity = comList.get(0);
            String conpanyName = entity.getName();
            String orgCode = entity.getOrgCode();
            String contact = entity.getContact();
            String email = entity.getEmail();
            String mobile = entity.getMobile();//手机
            String telephone = entity.getTelephone();//座机
            if (conpanyName == null) {
                conpanyName = "";
            }
            if (orgCode == null) {
                orgCode = "";
            }
            if (contact == null) {
                contact = "";
            }
            if (email == null) {
                email = "";
            }
            if (mobile == null) {
                mobile = "";
            }
            if (telephone == null) {
                telephone = "";
            }

            // 发送人
            String userName = request.getUserName();
            // 主题
            String subject = conpanyName + "办公地址新增通知";
            // 内容            String content = "<p>尊敬的用户，</p><p>&nbsp; &nbsp; 你好，打发士大夫犯得上地方是</p>";
            String content = "<p>尊敬的用户，</p><p>&nbsp; &nbsp; 您好，"

                    + conpanyName + "，新增了" + addressEntity.getAddressName() + "办公点，" +
                    "具体地址：" + addressEntity.getProvince() + addressEntity.getCity() + addressEntity.getDistrict() + "，" + addressEntity.getDetailAddress() +
                    "，联系人：" + contact + "，邮箱：" + email + "，座机：" + telephone + "，手机：" + mobile +
                    "，请核实该地址是否在经销商服务范围内，如不在服务范围内，请协调处理。</p>"+"<br/><br/>";

            // 目标邮箱
            List<String> toEmail = new ArrayList<>();
            List<Long> branIdList = companyManageMapper.selectBrandIdByOrgId(entity.getApprovalCompany().longValue());
            if (branIdList != null && !branIdList.isEmpty()) {
                Map<String, Object> map = new HashMap<>();
                map.put("branIdList", branIdList);
                List<Long> orgIds = orgMapper.selectOrgByBrand(map);
                orgIds.forEach(v -> {
                    OrgEntity org = orgMapper.selectByPrimaryKey(v);
                    toEmail.add(org.getEmail());
                });
            }

            //收件信息
            Map<String, Object> map = new HashMap<>();
            map.put("subject", subject);
            map.put("content", content);
            map.put("name", userName);
            map.put("type", EmailTypeE.ADDADRESS.getValue());
            map.put("code", conpanyName);
            logger.error("{toEmail的数量 ：--- }" + toEmail.size());
            if(!CollectionUtils.isEmpty(toEmail)){
                authServiceClient.sendEmail(toEmail, map);
            }

        }
    }

内容格式说明，与模板略有不同，<p></p>分段，

&nbsp; &nbsp; 缩进两个空格，<br/> 段落之间间隔

     // 内容            String content = "<p>尊敬的用户，</p><p>&nbsp; &nbsp; 你好，打发士大夫犯得上地方是</p>";
            String content = "<p>尊敬的用户，</p><p>&nbsp; &nbsp; 您好，"

                    + conpanyName + "，新增了" + addressEntity.getAddressName() + "办公点，" +
                    "具体地址：" + addressEntity.getProvince() + addressEntity.getCity() + addressEntity.getDistrict() + "，" + addressEntity.getDetailAddress() +
                    "，联系人：" + contact + "，邮箱：" + email + "，座机：" + telephone + "，手机：" + mobile +
                    "，请核实该地址是否在经销商服务范围内，如不在服务范围内，请协调处理。</p>"+"<br/><br/>";

2.2)由于当前调用方与邮件接口不在同一个服务，需要跨服务调用

	/**
	 * @param toEmail 要发送的邮箱
	 * @param map
	 * 			content:内容（必填）
	 * 			subject:主题（必填）
	 * 			name:发送人（必填）
	 * 			type:类型（必填）,0:开通账号 1:发布内购方案 2:新增办公地址
	 * 			code:类型所属编码（必填）,type=0,传公司名称，type=1,传内够方案编号  type=2,传公司名称
	 * 			attAddress:附件地址,非必填，多个附件以“,”隔开
	 */
    @RequestMapping(value = "/csms/auth/email/send", consumes = "application/json")
    void sendEmail(@RequestParam("toEmail") List<String> toEmail,@RequestBody() Map<String,Object> map) ;

2.2）邮件服务接口

Controller

@RestController
@RequestMapping("/csms/auth/email")
public class EmailController {
    
	@Autowired
    private EmailService emailService;
    
	/**
	 * @param toEmail 要发送的邮箱
	 * @param map
	 * 			content:内容（必填）
	 * 			subject:主题（必填）
	 * 			name:发送人（必填）
	 * 			type:类型（必填）,0:开通账号 1:发布内购方案 2:新增办公地址
	 * 			code:类型所属编码（必填）,type=0,传公司名称，type=1,传内够方案编号  type=2,传公司名称
	 * 			attAddress:附件地址,非必填，多个附件以“,”隔开
	 */
    @RequestMapping("/send")
    public void sendEmail(@RequestParam List<String> toEmail,@RequestBody Map<String,Object> map) {
    	emailService.sendMail(toEmail,map);
    }
    
}

ServiceImp

@Service
public class EmailService {
	private static Logger logger = LoggerFactory.getLogger(EmailService.class);
	private static final String EMAIL_SENDER_DEFAULT_NICK = "集团应用系统邮箱";
	private ExecutorService executor = Executors.newFixedThreadPool(5);
	private static final String FILE_PATH = "/data/nfs/upload/";
	private static final String FROM_MAIL = "systemadmin@saicmotor.com";
	private static final String MAIL_SMTP_HOST= "smtp.saicmotor.com";
	
	@Autowired
	private EmailLogMapper emailLogMapper;

	public void sendMail(List<String> toEmail, Map<String, Object> map) {
		executor.execute(new Runnable() {
			@Override
			public void run() {
				for (String email : toEmail) {
					try {
						send(email, map);
					} catch (Exception e) {
						e.printStackTrace();
						sendError(map.get("name").toString(), email, e.toString(), map);
					}
				}
			}
		});
	}
	
	private void send(String email, Map<String, Object> map) throws Exception {
		logger.info("开始给{}发送邮件.....", email);
		System.setProperty("mail.mime.splitlongparameters","false");
		Properties props = System.getProperties();
		props.put("mail.smtp.host", MAIL_SMTP_HOST);
		props.put("mail.smtp.port", 25);
		props.put("mail.smtp.auth", "false");
		props.put("mail.mime.splitlongparameters","false");
		Session session = Session.getDefaultInstance(props);
		MimeMessage message = new MimeMessage(session);
		MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(message, true, "UTF-8");
		mimeMessageHelper.setTo(email);
		mimeMessageHelper.setFrom(new InternetAddress(MimeUtility.encodeText(EMAIL_SENDER_DEFAULT_NICK) + "<" + FROM_MAIL + ">"));
		mimeMessageHelper.setText(map.get("content").toString(), true);// 设置邮件主题内容
		mimeMessageHelper.setSubject(map.get("subject").toString());
		if (map.get("attAddress") != null) {
			List<String> attAddresss = Splitter.on(",").splitToList(map.get("attAddress").toString());
			logger.info("发送的附件:{}", attAddresss);
			for (String attachment : attAddresss) {
				FileSystemResource file = new FileSystemResource(new File(FILE_PATH + attachment));
				String fileName = MimeUtility.encodeText(file.getFilename());
				logger.info("FileName is {},fileName={}",file.getFilename(),fileName);
				mimeMessageHelper.addAttachment(fileName, file);
//				mimeMessageHelper.addAttachment(MimeUtility.encodeWord(file.getFilename(), "B", "UTF-8"), file);
			}
		}
		Transport.send(message);
		logger.info("给{}发送邮件成功!", email);
	}
	
	private void sendError(String name,String email, String error,Map<String, Object> map){
		logger.error("发送人:{},给{}发送邮件失败!", name, email);
		EmailLogEntity entity = new EmailLogEntity();
		entity.setName(name);
		entity.setAttachment(map.get("attAddress") != null ? map.get("attAddress").toString() : null);
		entity.setContent(map.get("content").toString());
		entity.setSubject(map.get("subject").toString());
		entity.setType(Integer.valueOf(map.get("type").toString()));
		entity.setToEmail(email);
		entity.setCode(map.get("code").toString());
		entity.setCreateTime(new Date());
		entity.setCreateUser(name);
		entity.setUpdateTime(new Date());
		entity.setUpdateUser(name);
		entity.setIsDel(DeleteStatusE.USEFUL.getValue());
		entity.setDescription(error);
		emailLogMapper.insert(entity);
	}
	
}

说明

2.2.1)发送邮件接口使用固定大小的线程池，重新启动一个线程异步执行，发送邮件功能，这样调用方主线程可以快速响应，不用等到发送邮件线程完全执行结束，因为如果附件比较大，发送邮件耗时比较长。

类似启用异步线程的业务场景还有上传功能，业务流程为：导入数据，数据落表，上传数据到服务器，查看导入数据

上传过程比较耗时，通过线程异步执行。

2.2.2）这两个邮件地址如何理解

private static final String FROM_MAIL = "systemadmin@saicmotor.com";
	private static final String MAIL_SMTP_HOST= "smtp.saicmotor.com";

mimeMessageHelper.setFrom(new InternetAddress(MimeUtility.encodeText(EMAIL_SENDER_DEFAULT_NICK) + "<" + FROM_MAIL + ">"));

2.2.3）上传附件

FILE_PATH：服务器路径

attAdress：文件服务器相对路径

new File("文件全路径")

	private static final String FILE_PATH = "/data/nfs/upload/";

if (map.get("attAddress") != null) {
			List<String> attAddresss = Splitter.on(",").splitToList(map.get("attAddress").toString());
			logger.info("发送的附件:{}", attAddresss);
			for (String attachment : attAddresss) {
				FileSystemResource file = new FileSystemResource(new File(FILE_PATH + attachment));
				String fileName = MimeUtility.encodeText(file.getFilename());
				logger.info("FileName is {},fileName={}",file.getFilename(),fileName);
				mimeMessageHelper.addAttachment(fileName, file);
//				mimeMessageHelper.addAttachment(MimeUtility.encodeWord(file.getFilename(), "B", "UTF-8"), file);
			}
		}