Spring框架JavaMailSender发送邮件工具类详解

package com.test.email;

import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

/**
 * @author tlimited
 * @create 2017-08-17 11:38
 **/
public class SendMailUtils {

 // Spring的邮件工具类，实现了MailSender和JavaMailSender接口
 private JavaMailSenderImpl mailSender;

 /**
 * 初始化邮件发送数据
 * @param host 服务器
 * @param username 发送人
 * @param passwd 发送人密码
 */
 public void setInitData(String host,String username,String passwd){
  //创建邮件发送服务器
 mailSender = new JavaMailSenderImpl();
 mailSender.setHost(host);
 // mailSender.setPort(465);
 mailSender.setUsername(username);
 mailSender.setPassword(passwd);
 //加认证机制
 Properties javaMailProperties = new Properties();
 javaMailProperties.put("mail.smtp.auth", true);
 javaMailProperties.put("mail.smtp.starttls.enable", true);
 javaMailProperties.put("mail.smtp.timeout", 5000);
 mailSender.setJavaMailProperties(javaMailProperties);
 System.out.println("初始化邮件发送信息完成");
 }
 /**
 * 发送普通文本
 * @param email 对方邮箱地址
 * @param subject 主题
 * @param text 邮件内容
 */
 public void simpleMailSend(String email,String subject,String text) {
 //创建邮件内容
 SimpleMailMessage message=new SimpleMailMessage();
 message.setFrom(mailSender.getUsername());
 message.setTo(email);
 message.setSubject(subject);
 message.setText(text);
 //发送邮件
 mailSender.send(message);
 System.out.println("发送成功");
 }

 /**
 * 发送附件,支持多附件
 * //使用JavaMail的MimeMessage，支付更加复杂的邮件格式和内容
 //MimeMessages为复杂邮件模板，支持文本、附件、html、图片等。
 * @param email 对方邮箱
 * @param subject 主题
 * @param text 内容
 * @param paths 附件路径，和文件名
 * @throws MessagingException
 */
 public void attachedSend(String email,String subject,String text,Map<String,String> paths) throws MessagingException {

 MimeMessage message = mailSender.createMimeMessage();
 //创建MimeMessageHelper对象，处理MimeMessage的辅助类
 MimeMessageHelper helper = new MimeMessageHelper(message, true);
 //使用辅助类MimeMessage设定参数
 helper.setFrom(mailSender.getUsername());
 helper.setTo(email);
 helper.setSubject(subject);
 helper.setText(text);

 if (paths!=null){
  paths.forEach((k,v)->{
   //加载文件资源，作为附件
   FileSystemResource file = new FileSystemResource(v);
   try {
   //添加附件
   helper.addAttachment(k, file);
  } catch (Exception e) {
   e.printStackTrace();
  }
  });
 }
 //发送邮件
 mailSender.send(message);
 System.out.println("发送成功");
 }

 /**
 * 发送html文件，支持多图片
 * @param email 对方邮箱
 * @param subject 主题
 * @param text 内容
 * @param paths 富文本中添加用到的路径，一般是图片，或者css,js文件
 * @throws MessagingException
 */
 public void richContentSend(String email,String subject,String text,Map<String,String> paths) throws MessagingException {

 MimeMessage message = mailSender.createMimeMessage();
 MimeMessageHelper helper = new MimeMessageHelper(message, true);

 helper.setFrom(mailSender.getUsername());
 helper.setTo(email);
 helper.setSubject(subject);
 //第二个参数true，表示text的内容为html，然后注意<img/>标签，src='cid:file'，'cid'是contentId的缩写，'file'是一个标记，
 //需要在后面的代码中调用MimeMessageHelper的addInline方法替代成文件
 helper.setText(text,true);
 //文件地址相对应src目录
 // ClassPathResource file = new ClassPathResource("logo.png");

 if (paths!=null){
  paths.forEach((k,v)->{
   //文件地址对应系统目录
   FileSystemResource file = new FileSystemResource(v);
   try {
   helper.addInline(k, file);
  } catch (Exception e) {
   e.printStackTrace();
  }
  });
 }
 mailSender.send(message);
 System.out.println("发送成功");
 }

 /**
 * 群发多人，且多附件
 * @param mailto 多人邮件地址
 * @param subject 主题
 * @param text 内容
 * @param filePath 文件路径
 * @throws Exception
 */
 public void sendBatchMailWithFile(String[] emails, String subject, String text, String[] filePath) throws Exception { 

 MimeMessage mimeMessage = mailSender.createMimeMessage(); 
 MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8"); 
 messageHelper.setFrom(new InternetAddress(MimeUtility.encodeText(mailSender.getUsername()))); 
 messageHelper.setSubject(subject); 
 if (filePath != null) { 
  BodyPart mdp = new MimeBodyPart();// 新建一个存放信件内容的BodyPart对象 
  mdp.setContent(text, "text/html;charset=UTF-8");// 给BodyPart对象设置内容和格式/编码方式 
  Multipart mm = new MimeMultipart();// 新建一个MimeMultipart对象用来存放BodyPart对象 
  mm.addBodyPart(mdp);// 将BodyPart加入到MimeMultipart对象中(可以加入多个BodyPart) 
  // 把mm作为消息对象的内容 
  MimeBodyPart filePart; 
  FileDataSource filedatasource; 
  // 逐个加入附件 
  for (int j = 0; j < filePath.length; j++) { 
  filePart = new MimeBodyPart(); 
  filedatasource = new FileDataSource(filePath[j]); 
  filePart.setDataHandler(new DataHandler(filedatasource)); 
  try { 
   filePart.setFileName(MimeUtility.encodeText(filedatasource.getName())); 
  } catch (Exception e) { 
   e.printStackTrace(); 
  } 
  mm.addBodyPart(filePart); 
  } 
  mimeMessage.setContent(mm); 
 } else { 
  messageHelper.setText(text, true); 
 } 

 List<InternetAddress> list = new ArrayList<InternetAddress>();// 不能使用string类型的类型，这样只能发送一个收件人 
 for (int i = 0; i < emails.length; i++) { 
  list.add(new InternetAddress(emails[i])); 
 } 
 InternetAddress[] address = list.toArray(new InternetAddress[list.size()]); 

 mimeMessage.setRecipients(Message.RecipientType.TO, address); 
 mimeMessage = messageHelper.getMimeMessage(); 

 mailSender.send(mimeMessage); 
 System.out.println("发送成功");
 } 


 public static void main(String[] args) throws Exception
 {
 SendMailUtils test = new SendMailUtils();
 //测试发送普通文本
 // test.setInitData("smtp.qq.com","706548532@qq.com","123456");
 test.setInitData("smtp.163.com","1234@163.com","1234");
 test.simpleMailSend("1326624701@qq.com","测试","测试能不能发邮件！！！");

 //测试发送附件
 /* test.setInitData("smtp.163.com","1234@163.com","1234");
 Map<String,String> map = new HashMap<String, String>();
 map.put("test12.xls", "D:\\tomcat8\\apache-tomcat-8.0.29\\test12.xls");
 map.put("wsdl.rar", "D:\\wsdl.rar");
 test.attachedSend("706548532@qq.com","Hello Attachment","This is a mail with attachment",map);
 */

 //测试发送富文本（html文件）
 /* test.setInitData("smtp.163.com","1234@163.com","1234");
 String text = "<body><p style='color:red;'>Hello Html Email</p><img src='cid:file'/></body>";
 Map<String,String> map = new HashMap<String, String>();
 map.put("file", "E:\\1f7827.jpg");
 test.richContentSend("706548532@qq.com","邮件标题",text,map);*/

 //测试群发多人多附件
 test.setInitData("smtp.163.com","1234@163.com","1234");
 String [] address = {"706548532@qq.com","1326624701@qq.com"};
 String [] filePath = {"D:\\tomcat8\\apache-tomcat-8.0.29\\test12.xls", "D:\\wsdl.rar"};
 test.sendBatchMailWithFile(address, "群发多文件", "实时", filePath);
 }

}