1、设置系统值
System.setProperty("mail.mime.splitlongparameters", "false");
2、 在创建对象的时候定义编码格式(utf-8)：
MimeMessageHelper helper = new MimeMessageHelper(mes, true, "utf-8");
3、 其次，在添加附件的时候，附件名是需要定义编码的
helper.addAttachment(MimeUtility.encodeWord(附件名,"utf-8","B"), 你的附件对象);
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原文链接：https://blog.csdn.net/qq3892997/article/details/126013828
java
//生成的数据通过excel附件的方式，进行发送。
public void sendMail(String mailFrom, String mailTo, String title, String content, File file) throws Exception {
System.setProperty("mail.mime.splitlongparameters", "false");//1.设置系统值 ---处理文件名乱码
MimeMessage mimeMessage = mailSender.createMimeMessage();
MimeMessageHelper msg = new MimeMessageHelper(mimeMessage, true, "utf-8");//2.在创建对象的时候定义编码格式(utf-8)
msg.addAttachment(MimeUtility.encodeWord(excelName,"utf-8","B"), file); //3.在添加附件的时候，附件名是需要定义编码的 ---以上3条都得有，否则文件名乱码
msg.setFrom(mailFrom);
msg.setTo(mailTo);
msg.setSubject(title);
msg.setText(content, true);
mailSender.send(mimeMessage);
}工具类
java
@Component
@Slf4j
/**
* 发送邮件工具类
* @author ZMH
* @date 7/7/2023 2:03 下午
*/
public class EmailUtils {
@Autowired
private JavaMailSender javaMailSender;
/**
* 发送纯文本邮件
* @author ZMH
* @date 7/7/2023 10:37 上午
* @param subject 邮件主题
* @param text 邮件内容
* @param targetEmail 目标邮件地址
* @param sourceEmail 源邮件地址
* @return void
*/
public void sendTextEmail (String subject,String text,String targetEmail,String sourceEmail ){
SimpleMailMessage mailMessage = new SimpleMailMessage();
mailMessage.setSubject(subject);//主题
mailMessage.setText(text);//内容
if (StringUtils.isNotBlank(targetEmail) && targetEmail.split(",").length>1){
mailMessage.setTo(targetEmail.split(","));//多个号码发送，该发送会将目标邮件分组发送
}else {
mailMessage.setTo(targetEmail);
}
mailMessage.setFrom(sourceEmail);
javaMailSender.send(mailMessage);
}
/**
* 发送文本邮件和附件
* @author ZMH
* @date 7/7/2023 2:01 下午
* @param subject 主题
* @param text 文本内容
* @param targetEmail 目标邮件
* @param sourceEmail 源邮件
* @param annexList 附件List
* @param anneNameList 附件名称List
* @return void
*/
public void sendTextAndAnnexEmail(String subject,String text,String targetEmail,String sourceEmail,
String personal, List<File> annexList,List<String> anneNameList ) throws MessagingException {
sendSeniorEmail(subject,null,false,text,targetEmail,sourceEmail,personal,annexList,anneNameList);
}
/**
* 发送邮件根据HTML模本文件
* @author ZMH
* @date 7/7/2023 11:16 上午
* @param subject 主题
* @param content 内容
* @param targetEmail 目标邮件
* @param sourceEmail 源邮件
* @return void
*/
public void sendHTMLEmail(String subject,String content,String targetEmail,String sourceEmail,String personal) throws MessagingException {
sendSeniorEmail(subject,content,true,"",targetEmail,sourceEmail,personal,null,null);
}
/**
* 发送模版文件并包含附件
* @author ZMH
* @date 7/7/2023 11:20 上午
* @param subject 主题
* @param content 内容
* @param targetEmail 目标邮件
* @param sourceEmail 源邮件
* @param annexList 附件
* @param annexNameList 附件名称
* @return void
*/
public void sendHTMLAndAnnexEmail(String subject,String content,String targetEmail,
String sourceEmail,String personal,List<File> annexList,List<String> annexNameList) throws MessagingException {
sendSeniorEmail(subject,content,true,"",targetEmail,sourceEmail,personal,annexList,annexNameList);
}
/**
* 发送高级邮件
* @author ZMH
* @date 7/7/2023 11:26 上午
* @param subject 主题
* @param concent content
* @param targetEmail 目标邮箱
* @param sourceEmail 源邮箱
* @param annexList 附件
* @param annexNameList 附件名称
* @return void
*/
private void sendSeniorEmail(String subject, String concent, Boolean isHtml, String txet, String targetEmail,
String sourceEmail,String personal, List<File> annexList, List<String> annexNameList) throws MessagingException{
System.setProperty("mail.mime.splitlongparameters", "false");//1.设置系统值 ---处理文件名乱码
MimeMessage message = javaMailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message,true,"utf-8");
helper.setSubject(subject);//邮件主题
try {
helper.setFrom(sourceEmail,personal);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (StringUtils.isNotBlank(targetEmail) && targetEmail.split(",").length>1){
helper.setTo(targetEmail.split(","));//多个号码发送，该发送为分组发送
}else {
helper.setTo(targetEmail);
}
if (isHtml) {
//String absolutePath = htmlFile.getAbsolutePath();
//String htmlModel = FileUtil.getStringByFile(absolutePath);
concent = "<!DOCTYPE html>\n" +
"<html lang=\"en\">\n" +
"<head>\n" +
" <meta charset=\"UTF-8\">\n" +
" <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n" +
" <title></title>\n" +
"</head>\n" +
"<body>\n" +
" <div>" + concent + "</div>\n" +
"</body>\n" +
"</html>";
helper.setText(concent,true);
}else {
helper.setText(txet,false);
}
helper.setSentDate(new Date());//邮件发送时间
if (!CollectionUtils.isEmpty(annexList)){
if (CollectionUtils.isEmpty(annexNameList)){
for (File file : annexList) {
annexNameList.add(file.getName());
}
}else {
if (annexList.size()!= annexNameList.size()){
throw new MessagingException("附件名称和附件条次不一致");
}
}
try {
for (int i = 0; i < annexList.size(); i++) {
helper.addAttachment(MimeUtility.encodeWord(annexNameList.get(i), "utf-8", "B"), annexList.get(i));
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
javaMailSender.send(message);
}
}yml配置文件增加
xml
spring:
mail:
username: 邮箱号码
password: 授权码
host: smtp.qq.com
port: 465
properties:
mail:
smtp:
auth: true
socketFactory:
class: javax.net.ssl.SSLSocketFactory
starttls:
enable: true
ssl:
enable: truepom.xml 增加
xml
<!-- SpringEmail -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>