问题：
客户生产机器，每次发送邮件带有附件的时候就会导致乱码，而且乱码很奇特，有规律的那种样例就是：
=?UTF-8?Q?=E6=96=B0=E5=BB=BA=E6=96=87=E6=9C=AC=E6=96=87=E6=A1=A3_?= =?UTF-8?Q?=5F2=29=2Etxt?=
但是我的真实的文件名称是“新建文本文件.txt”
百度各种办法，有个说没有编码。有的说系统语言有问题
无效办法一：
public static void main(String[] args) {
String s = "=?UTF-8?Q?=E6=96=B0=E5=BB=BA=E6=96=87=E6=9C=AC=E6=96=87=E6=A1=A3_?= =?UTF-8?Q?=5F2=29=2Etxt?=";
try{
Map<String, String> fileMap = new HashMap<>();
fileMap.put("文本文件.txt","/opt/uuu");
MailBean mailBean = new MailBean();
mailBean.setAttachments(fileMap);
UnitedLogger.debug(mailBean.getAttachments());
System.out.println(s);
System.out.println("编码后的文件名称encodeWord："+ MimeUtility.encodeWord(s));
System.out.println("编码后的文件名称encodeWord-B："+ MimeUtility.encodeWord(s,"UTF8","B"));
System.out.println("编码后的文件名称encodeText："+ MimeUtility.encodeText(s));
System.out.println("编码后的文件名称encodeText-B："+ MimeUtility.encodeText(s,"UTF8","B"));
System.out.println("编码后的文件名称encodeText-B："+ MimeUtility.encodeText(s,MimeUtility.mimeCharset("gb2312"), null));
}catch (Exception e){
}
}上述办法无法解决，还是乱码
无效办法二：
因为客户生产是Redhat系统，所以我就查看了一下他们的服务器语言变量
echo $LANG
发现打印的是US的语言，我就经过对方同意后改了一下这个变量，还是不行
export LANG="zh_CN.UTF-8" export LC_ALL="zh_CN.UTF-8"
在中午吃外卖的时候，碰到产品组一个同事，随口问了一句，然后回到工位他给我发了个链接：
https://blog.csdn.net/qq_29407009/article/details/78557886
这个解决了我的问题：
解决办法就是不让截断文件名。因为中文文件名被base64加密后肯定超过60位长度：
System.setProperty("mail.mime.splitlongparameters","false");然而，测试环境正常，生产环境又不行了，后来想是不是docker环境不支持中文导致的
生产解决办法：
1）进入docker镜像
docker exec -it id bash
2）查看语言
locale
POSIX是不支持中文的
3）查看系统是否有中文包：
locale -a
如果有C.UTF-8或者zh_CN.UTF-8
4）执行
LANG=C.UTF-8
如果没有C.UTF-8或者zh_CN.UTF-8
就需要
yum install kde-l10n-Chinese -y
yum reinstall glibc-common -y
localedef -c -f UTF-8 -i zh_CN zh_CN.utf8
最后附上我的邮件发送代码：
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.datadriver.common.entity.RunnableAsyc;
import com.datadriver.common.entity.UnitedException;
import com.datadriver.common.entity.UnitedLogger;
import com.datadriver.common.util.ThreadPoolExecutorUtil;
import com.datadriver.email.model.MailBean;
import com.datadriver.email.service.EmailSettingInfoService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.util.ObjectUtils;
import javax.annotation.Resource;
import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.io.File;
import java.util.*;
import java.util.Map.Entry;
import java.util.concurrent.ExecutionException;
@Component
public class GFXDMailSenderExecutor {
private EmailSettingInfoService emailSettingInfoService;
private JavaMailSenderImpl javaMailSender;
private static final String TRUE = "true";
private static final String SEND_TYPE_TEXT = "text";
private static final String SEND_TYPE_HTML = "html";
private static final String SEND_STATUS_FAILD = "101";
private static final String SEND_STATUS_SUCCESS = "100";
public GFXDMailSenderExecutor() {
}
public void initMailSetting() {
boolean empty = ObjectUtils.isEmpty(this.javaMailSender);
boolean notEmpty = !ObjectUtils.isEmpty(this.javaMailSender);
boolean fieldEmpty = notEmpty && (StringUtils.isBlank(this.javaMailSender.getUsername()) || StringUtils.isBlank(this.javaMailSender.getPassword()));
if (empty || fieldEmpty) {
this.javaMailSender = this.javaMailSender();
}
}
public void senderEmail(MailBean mailBean) {
this.submit(mailBean);
}
private void submit(MailBean m) {
try {
ThreadPoolExecutorUtil.submit(new GFXDMailSenderExecutor.SendMailThread(m, this.emailSettingInfoService));
} catch (ExecutionException | InterruptedException var3) {
UnitedLogger.error("MailSenderExecutor.submit******* 邮件异常 ID=" + m.getRecordId() + "Error:", var3);
Thread.currentThread().interrupt();
}
}
private void send(MailBean mailBean) throws Exception {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(this.javaMailSender.getUsername());
String[] emails = getEmails(mailBean.getRecipientsEmail());
message.setTo(emails);
message.setSubject(mailBean.getSubject());
message.setText(mailBean.getContent());
message.setSentDate(new Date());
UnitedLogger.info("线程运行正在发送至 " + mailBean.getRecipientsEmail() + " ....\n");
this.javaMailSender.send(message);
}
private void sendHtml(MailBean mailBean) throws Exception {
UnitedLogger.debug("getAttachments:"+mailBean.getAttachments());
MimeMessage message = this.javaMailSender.createMimeMessage();
MimeMessageHelper messageHelper;
try {
messageHelper = new MimeMessageHelper(message, true, "UTF-8");
} catch (MessagingException var11) {
throw new UnitedException("I18N-MSG-999900000230");
}
messageHelper.setFrom(this.javaMailSender.getUsername());
String[] emails = getEmails(mailBean.getRecipientsEmail());
messageHelper.setTo(emails);
if (org.apache.commons.lang3.ObjectUtils.anyNotNull(new Object[]{mailBean.getSubject()})) {
messageHelper.setSubject(mailBean.getSubject());
}
messageHelper.setText(mailBean.getContent(), true);
Iterator it;
Entry entry;
String cid;
String filePath;
File file;
FileSystemResource fileResource;
if (org.apache.commons.lang3.ObjectUtils.anyNotNull(new Object[]{mailBean.getPictures()})) {
it = mailBean.getPictures().entrySet().iterator();
while(it.hasNext()) {
entry = (Entry)it.next();
cid = (String)entry.getKey();
filePath = (String)entry.getValue();
if (StringUtils.isBlank(cid) || StringUtils.isBlank(filePath)) {
UnitedLogger.debug("请确认每张图片的ID和图片地址是否齐全\n");
throw new UnitedException("I18N-MSG-999900000240");
}
file = new File(filePath);
if (!file.exists()) {
UnitedLogger.debug("图片路径[" + filePath + "]不存在\n");
throw new UnitedException("I18N-MSG-999900000250");
}
fileResource = new FileSystemResource(file);
messageHelper.addInline(cid, fileResource);
}
}
if (org.apache.commons.lang3.ObjectUtils.anyNotNull(new Object[]{mailBean.getAttachments()})) {
it = mailBean.getAttachments().entrySet().iterator();
UnitedLogger.debug("getAttachments:"+mailBean.getAttachments());
while(it.hasNext()) {
entry = (Entry)it.next();
cid = (String)entry.getKey();
filePath = (String)entry.getValue();
if (StringUtils.isBlank(cid) || StringUtils.isBlank(filePath)) {
UnitedLogger.debug("请确认每个附件的ID和地址是否齐全\n");
throw new UnitedException("I18N-MSG-999900000260");
}
file = new File(filePath);
if (!file.exists()) {
UnitedLogger.debug("附件路径[" + filePath + "]不存在\n");
throw new UnitedException("I18N-MSG-999900000270");
}
fileResource = new FileSystemResource(file);
messageHelper.addAttachment(cid, fileResource);
}
}
messageHelper.setSentDate(new Date());
UnitedLogger.info("线程运行正在发送至 " + mailBean.getRecipientsEmail() + " ....\n");
this.javaMailSender.send(message);
}
private static String[] getEmails(String emailstr) throws UnitedException {
String[] toEmailArray = null;
if (StringUtils.isNotBlank(emailstr)) {
toEmailArray = emailstr.split(",");
List<String> toEmailList = new ArrayList();
if (!org.apache.commons.lang3.ObjectUtils.anyNotNull(toEmailArray)) {
UnitedLogger.debug("收件人邮箱不得为空\n");
throw new UnitedException("I18N-MSG-999900000280");
}
String[] var3 = toEmailArray;
int var4 = toEmailArray.length;
for(int var5 = 0; var5 < var4; ++var5) {
String s = var3[var5];
if (StringUtils.isNotBlank(s)) {
toEmailList.add(s);
}
}
if (!org.apache.commons.lang3.ObjectUtils.anyNotNull(new Object[]{toEmailList})) {
UnitedLogger.debug("收件人邮箱不得为空\n");
throw new UnitedException("I18N-MSG-999900000280");
}
toEmailArray = new String[toEmailList.size()];
if (org.apache.commons.lang3.ObjectUtils.anyNotNull(new Object[]{toEmailList})) {
for(int i = 0; i < toEmailList.size(); ++i) {
toEmailArray[i] = (String)toEmailList.get(i);
}
}
}
return toEmailArray;
}
private JavaMailSenderImpl javaMailSender() {
JavaMailSenderImpl sender = new JavaMailSenderImpl();
try {
System.setProperty("mail.mime.splitlongparameters","false");
String jsonstr = this.emailSettingInfoService.getEmailSettingInfo();
if (StringUtils.isNotBlank(jsonstr)) {
JSONObject json = JSON.parseObject(jsonstr);
String host = (String)json.get("host");
Integer port = Integer.parseInt((String)json.get("port"));
final String emailname = (String)json.get("username");
final String password = (String)json.get("password");
String protocol = (String)json.get("protocol");
String auth = (String)json.get("auth");
String starttls = (String)json.get("starttls");
String ssl = (String)json.get("ssl");
sender.setHost(host);
sender.setPort(port);
sender.setProtocol(protocol);
sender.setUsername(emailname);
sender.setPassword(password);
sender.setDefaultEncoding("UTF-8");
Properties props = new Properties();
props.setProperty("mail.smtp.auth", auth);
if (StringUtils.equals("true", ssl)) {
props.setProperty("mail.smtp.ssl.enable", ssl);
props.setProperty("mail.smtp.ssl.trust", host);
props.setProperty("mail.smtp.socketFactory.port", String.valueOf(port));
props.setProperty("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
}
if (StringUtils.equals("true", starttls)) {
props.setProperty("mail.smtp.starttls.enable", starttls);
props.setProperty("mail.smtp.starttls.required", starttls);
}
props.setProperty("mail.transport.protocol", protocol);
Session session = Session.getDefaultInstance(props, new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(emailname, password);
}
});
sender.setSession(session);
sender.setJavaMailProperties(props);
}
} catch (UnitedException var14) {
UnitedLogger.error(var14);
}
return sender;
}
private EmailSettingInfoService getEmailSettingInfoService() {
return this.emailSettingInfoService;
}
@Resource(
name = "emailSettingInfoService"
)
private void setEmailSettingInfoService(EmailSettingInfoService emailSettingInfoService) {
this.emailSettingInfoService = emailSettingInfoService;
}
private class SendMailThread extends RunnableAsyc {
private MailBean mailBean;
private EmailSettingInfoService emailSettingInfoService;
public void run() {
String status = "101";
try {
UnitedLogger.info("------------ 线程运行正在发送 ----------\n");
if ("text".equals(this.mailBean.getSendType())) {
GFXDMailSenderExecutor.this.send(this.mailBean);
} else if ("html".equals(this.mailBean.getSendType())) {
GFXDMailSenderExecutor.this.sendHtml(this.mailBean);
}
UnitedLogger.info("------------ 发送邮件至 " + this.mailBean.getRecipientsEmail() + " 完成 ----------\n");
status = "100";
} catch (Exception var3) {
UnitedLogger.error(var3);
status = "101";
}
if (StringUtils.isNotBlank(this.mailBean.getRecordId())) {
this.emailSettingInfoService.updateMessageRecordStatusById(status, this.mailBean.getRecordId());
}
}
public SendMailThread(MailBean mailBean, EmailSettingInfoService emailSettingInfoService) {
this.mailBean = mailBean;
this.emailSettingInfoService = emailSettingInfoService;
}
}
}2、MailBean
import java.util.Map;
public class MailBean {
private String recipientsEmail;
private String subject;
private String content;
private String recordId;
private String sendType = "html";
private Map<String, Object> params;
private Map<String, String> pictures;
private Map<String, String> attachments;
private String sendStatus;
public MailBean() {
}
public MailBean(String recipientsEmail, String subject, String content) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
}
public MailBean(String recipientsEmail, String subject, String content, String recordId) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
this.recordId = recordId;
}
public MailBean(String recipientsEmail, String subject, String content, String recordId, String sendType) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
this.recordId = recordId;
this.sendType = sendType;
}
public MailBean(String recipientsEmail, String subject, String content, String recordId, Map<String, String> pictures, Map<String, String> attachments) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
this.recordId = recordId;
this.pictures = pictures;
this.attachments = attachments;
}
public MailBean(String recipientsEmail, String subject, String content, String recordId, String sendType, Map<String, String> pictures, Map<String, String> attachments) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
this.recordId = recordId;
this.sendType = sendType;
this.pictures = pictures;
this.attachments = attachments;
}
public MailBean(String recipientsEmail, String subject, String content, String recordId, String sendType, Map<String, String> pictures, Map<String, String> attachments, Map<String, Object> params) {
this.recipientsEmail = recipientsEmail;
this.subject = subject;
this.content = content;
this.recordId = recordId;
this.sendType = sendType;
this.pictures = pictures;
this.attachments = attachments;
this.params = params;
}
public String getRecipientsEmail() {
return this.recipientsEmail;
}
public void setRecipientsEmail(String recipientsEmail) {
this.recipientsEmail = recipientsEmail;
}
public String getSubject() {
return this.subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getContent() {
return this.content;
}
public void setContent(String content) {
this.content = content;
}
public String getRecordId() {
return this.recordId;
}
public void setRecordId(String recordId) {
this.recordId = recordId;
}
public String getSendType() {
return this.sendType;
}
public void setSendType(String sendType) {
this.sendType = sendType;
}
public Map<String, Object> getParams() {
return this.params;
}
public void setParams(Map<String, Object> params) {
this.params = params;
}
public Map<String, String> getPictures() {
return this.pictures;
}
public void setPictures(Map<String, String> pictures) {
this.pictures = pictures;
}
public Map<String, String> getAttachments() {
return this.attachments;
}
public void setAttachments(Map<String, String> attachments) {
this.attachments = attachments;
}
public String getSendStatus() {
return this.sendStatus;
}
public void setSendStatus(String sendStatus) {
this.sendStatus = sendStatus;
}
} 
