本文实例为大家分享了用JavaMail发送HTML模板邮件的具体代码，供大家参考，具体内容如下
依赖
<dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.10.3</version> </dependency> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4.1</version> </dependency>
工具类
package test.email;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Date;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 发送邮件工具类
*/
public class MailUtil {
private final static Logger logger = LoggerFactory.getLogger(MailUtil.class);
/**
* 邮件发送
* @param mailHost 邮件服务地址
* @param fromMail 发件人
* @param fromName 发件人名
* @param fromMailPwd 发件人密码
* @param toMails 收件人，多个用英文逗号分隔
* @param mailTitle 邮件标题
* @param mailContent 邮件内容
* @throws Exception
*/
public static void sendMail(String mailHost, String fromMail, String fromName, String fromMailPwd,
String toMails, String mailTitle, String mailContent) throws Exception {
String[] toMailArr = null;
if (toMails != null && !toMails.equals("")) {
toMailArr = toMails.split(",");
} else {
throw new Exception("邮件发送人不能为空");
}
// 邮件属性信息
Properties props = new Properties();
props.put("mail.host", mailHost);
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
Session session = Session.getInstance(props); // 根据属性新建一个邮件会话
//session.setDebug(true); // 是否打印调试信息
toMailArr = toMails.split(",");
for (String to : toMailArr) {
MimeMessage message = new MimeMessage(session); // 由邮件会话新建一个消息对象
message.setFrom(new InternetAddress(fromMail));// 设置发件人的地址
message.setRecipient(Message.RecipientType.TO, new InternetAddress(to, fromName));// 设置收件人,并设置其接收类型为TO
message.setSubject(mailTitle);// 设置标题
message.setContent(mailContent, "text/html;charset=UTF-8"); // 设置邮件内容类型为html
message.setSentDate(new Date());// 设置发信时间
message.saveChanges();// 存储邮件信息
// 发送邮件
Transport transport = session.getTransport();
transport.connect(fromMail, fromMailPwd);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
}
/**
* 邮件发送（群发）
* @param mailHost 邮件服务地址
* @param fromMail 发件人
* @param fromName 发件人名
* @param fromMailPwd 发件人密码
* @param toMails 收件人，多个用英文逗号分隔
* @param mailTitle 邮件标题
* @param mailContent 邮件内容
* @throws Exception
*/
public static void sendGroupMail(String mailHost, String fromMail, String fromName, String fromMailPwd,
String toMails, String mailTitle, String mailContent) throws Exception {
String[] toMailArr = null;
if (toMails != null && !toMails.equals("")) {
toMailArr = toMails.split(",");
} else {
throw new Exception("邮件发送人不能为空");
}
// 邮件属性信息
Properties props = new Properties();
props.put("mail.host", mailHost);
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
Session session = Session.getInstance(props); // 根据属性新建一个邮件会话
//session.setDebug(true); // 是否打印调试信息
MimeMessage message = new MimeMessage(session); // 由邮件会话新建一个消息对象
message.setFrom(new InternetAddress(fromMail)); // 设置发件人的地址
InternetAddress[] sendTo = new InternetAddress[toMailArr.length];
for (int i = 0; i < toMailArr.length; i ) {
sendTo[i] = new InternetAddress(toMailArr[i], fromName);
}
message.setRecipients(Message.RecipientType.TO, sendTo); // 设置收件人,并设置其接收类型为TO
message.setSubject(mailTitle); // 设置标题
message.setContent(mailContent, "text/html;charset=UTF-8"); // 设置邮件内容类型为html
message.setSentDate(new Date()); // 设置发信时间
message.saveChanges(); // 存储邮件信息
// 发送邮件
Transport transport = session.getTransport();
transport.connect(fromMail, fromMailPwd);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
/**
* 读取html文件为String
* @param htmlFileName
* @return
* @throws Exception
*/
public static String readHtmlToString(String htmlFileName) throws Exception{
InputStream is = null;
Reader reader = null;
try {
is = MailUtil.class.getClassLoader().getResourceAsStream(htmlFileName);
if (is == null) {
throw new Exception("未找到模板文件");
}
reader = new InputStreamReader(is, "UTF-8");
StringBuilder sb = new StringBuilder();
int bufferSize = 1024;
char[] buffer = new char[bufferSize];
int length = 0;
while ((length = reader.read(buffer, 0, bufferSize)) != -1){
sb.append(buffer, 0, length);
}
return sb.toString();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
logger.error("关闭io流异常", e);
}
try {
if (reader != null) {
reader.close();
}
} catch ( IOException e) {
logger.error("关闭io流异常", e);
}
}
}
}HTML模板
<!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <title>java 邮件发送</title> </head> <body> <h1 id="title"></h1> <div id="content"></div> </body> </html>
测试
package test.email;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
public class SendHtmlTemplateMail {
public static void main(String[] args) throws Exception {
// 读取html模板
String html = MailUtil.readHtmlToString("mailTemplate.html");
// 写入模板内容
Document doc = Jsoup.parse(html);
doc.getElementById("title").html("java 邮件发送测试");
doc.getElementById("content").html("么么哒");
String result = doc.toString();
String mailHost = "smtp.qq.com";
String fromMail = "";
String fromName = "小灰";
String fromMailPwd = "";
String toMails = "";
String mailTitle = "hello javamail";
String mailContent = result;
// 发送邮件
MailUtil.sendMail(mailHost, fromMail, fromName, fromMailPwd, toMails, mailTitle, mailContent);
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。