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這篇文章主要講解了“Java怎么實現批量發送帶附件的郵件”，文中的講解內容簡單清晰，易于學習與理解，下面請大家跟著小編的思路慢慢深入，一起來研究和學習“Java怎么實現批量發送帶附件的郵件”吧！
代碼詳情如下：
package Email;
/*
* 參數實體類
* */
public class EmailParameter {
//發信郵箱
private String fromMailbox;
//發信郵箱密碼(獨立郵箱填寫密碼,163或qq等第三方郵箱填寫授權碼)
private String fromMailboxPWD;
//收信郵箱
private String toMailbox;
//附件在本機下的目錄路徑
private String enclosurePath;
//郵箱主機(如QQ郵箱是smtp.qq.com、163郵箱是smtp.163.com)
private String host;
//與上一次發送郵件間隔時間 默認5秒
private long sleepTime = 5000;
//郵件發送成功后給本地文件打的成功標識
private String successTag;
public String getSuccessTag() {
return successTag;
}
public void setSuccessTag(String successTag) {
this.successTag = successTag;
}
public String getFromMailbox() {
return fromMailbox;
}
public void setFromMailbox(String fromMailbox) {
this.fromMailbox = fromMailbox;
}
public String getFromMailboxPWD() {
return fromMailboxPWD;
}
public void setFromMailboxPWD(String fromMailboxPWD) {
this.fromMailboxPWD = fromMailboxPWD;
}
public String getToMailbox() {
return toMailbox;
}
public void setToMailbox(String toMailbox) {
this.toMailbox = toMailbox;
}
public String getEnclosurePath() {
return enclosurePath;
}
public void setEnclosurePath(String enclosurePath) {
this.enclosurePath = enclosurePath;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public long getSleepTime() {
return sleepTime;
}
public void setSleepTime(long sleepTime) {
this.sleepTime = sleepTime;
}
@Override
public String toString() {
return "EmailParameter{" +
"fromMailbox='" + fromMailbox + '\'' +
", fromMailboxPWD='" + fromMailboxPWD + '\'' +
", toMailbox='" + toMailbox + '\'' +
", enclosurePath='" + enclosurePath + '\'' +
", host='" + host + '\'' +
", sleepTime=" + sleepTime +
", successTag='" + successTag + '\'' +
'}';
}
}在確認程序運行完或發送故障報錯后那些本地郵件已被發送那些本地文件未被發送時，我代碼中用的是修改文件名的方式。這種方式方便但會有弊端，當你要發送的附件文件為被分卷切分后的文件時，文件名被修改會導致該分卷切分文件不能被正常解壓提取。建議用生成txt文件的方式記錄已發送文件的文件名。
代碼詳情如下：
package Email;
import com.sun.mail.util.MailSSLSocketFactory;
import org.springframework.util.StringUtils;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.File;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/*
* 編輯并發送郵件Service
* */
public class EmailsServiceImpl {
public String sendEmails(EmailParameter parameter){
if(!this.isMailbox(parameter.getFromMailbox())){
return "發信郵箱格式不正確";
}
if(!this.isMailbox(parameter.getToMailbox())){
return "收信郵箱格式不正確";
}
try{
//獲取郵件主機系統屬性
Properties properties = System.getProperties();
//設置郵件服務器
properties.setProperty("mail.smtp.host", parameter.getHost());
properties.put("mail.smtp.auth", "true");
MailSSLSocketFactory sslSocketFactory = new MailSSLSocketFactory();
sslSocketFactory.setTrustAllHosts(true);
properties.put("mail.smtp.ssl.enable", "true");
properties.put("mail.smtp.ssl.socketFactory", sslSocketFactory);
//獲取session
Session session = Session.getDefaultInstance(properties,new Authenticator(){
public PasswordAuthentication getPasswordAuthentication() {
//發件人賬號密碼
return new PasswordAuthentication(parameter.getFromMailbox(), parameter.getFromMailboxPWD());
}
});
//附件所在的目錄路徑
File fileUrl = new File(parameter.getEnclosurePath());
//獲取目錄下的所有文件(可以在.listFiles()方法中使用匿名內部類重寫accept()方法針對文件名對文件進行過濾)
File fileList [] = fileUrl.listFiles();
//已發送郵件數
int currentNum = 1;
if(StringUtils.isEmpty(fileList)){
return "文件夾"+parameter.getEnclosurePath()+"內容為空";
}
for(File file : fileList){
//待發送郵件數
int surplusNum = fileList.length-currentNum;
//創建郵件
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(parameter.getFromMailbox()));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(parameter.getToMailbox()));
//郵件名命名
message.setSubject(file.getName());
//郵件文本
BodyPart messageBodyPart = new MimeBodyPart();
String text=String.format("本次共將發送郵件%s封-已發送%s封-待發送%s封", fileList.length,currentNum,surplusNum);
messageBodyPart.setText(text);
//郵件內容
Multipart multipart = new MimeMultipart();
//將郵件文本放進郵件內容中
multipart.addBodyPart(messageBodyPart);
//郵件附件
messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(file);
messageBodyPart.setDataHandler(new DataHandler(source));
//附件名命名
messageBodyPart.setFileName(MimeUtility.encodeText(file.getName()));
//將附件放進郵件內容中
multipart.addBodyPart(messageBodyPart);
//將郵件內容放進郵件中
message.setContent(multipart);
//發送
Transport.send(message);
//發送成功后將作為附件的本地文件名添加上成功標識,防止發送郵件中程序意外終止后無法區分已發送和未發送(用時間戳區分批次順序用currentNum區分在本批次中的順序)
File newFileName = new File(file.getParent() + File.separator + String.format("%s_%s_%s",parameter.getSuccessTag(),currentNum,file.getName()));
file.renameTo(newFileName);
currentNum++;
System.out.println(text+"|已發送文件:"+file.getName());
//增加時間散列防止被第三方郵箱系統檢測為垃圾郵箱
Thread.sleep(parameter.getSleepTime());
}
}catch (Exception e) {
e.printStackTrace();
}
return "發送成功";
}
//郵箱驗證
public boolean isMailbox(String mailbox){
String check = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
Pattern regex = Pattern.compile(check);
Matcher matcher = regex.matcher(mailbox);
boolean result = matcher.matches();
return result;
}
}package Email;
public class Email {
public static void main(String[] args) throws Exception {
EmailParameter emailParameter = new EmailParameter();
emailParameter.setFromMailbox("******@163.com");
emailParameter.setFromMailboxPWD("******");
emailParameter.setToMailbox("******@qq.com");
emailParameter.setEnclosurePath("C:\\Users\\ly\\Desktop\\email");
emailParameter.setHost("smtp.163.com");
emailParameter.setSleepTime(5000);
emailParameter.setSuccessTag("ss");
System.out.println(new EmailsServiceImpl().sendEmails(emailParameter));
}
}感謝各位的閱讀，以上就是“Java怎么實現批量發送帶附件的郵件”的內容了，經過本文的學習后，相信大家對Java怎么實現批量發送帶附件的郵件這一問題有了更深刻的體會，具體使用情況還需要大家實踐驗證。這里是億速云，小編將為大家推送更多相關知識點的文章，歡迎關注！
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