这段时间通过kettle完成了一个产品到期提醒的功能，也就是通过发送会议邀约的方式实现定时提醒。由于kettle自带有发送邮件的组件，但并没有发送会议邀约的组件，所以只能通过Java代码组件来进行自行开发实现。而在实现这个的过程中，我踩了一些小坑，在此做个小总结，便于后期回顾，也期待能够借此帮助到他人。
首先介绍下分享流程：1. 了解使用java代码发送会议邀约的流程；2. 介绍通过kettle的java代码组件发送会议邀约的方式。说明：本次分享主要是针对outlook邮箱和foxmail邮箱，其他邮箱我并没有测试，想必效果应该也都是差不多的。
1.java代码发送会议邀约
代码很详细，注释也很清楚，下面直接上代码。
pom.xml依赖:
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>
code代码:
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.util.ByteArrayDataSource;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
public class Email {
public void send(String fromEmail, String toEmail, String emailPort, String emailHost, String valarmDt, String subject, String location, String emailContent) {
try {
Properties props = new Properties();
props.put("mail.smtp.port", emailPort);
props.put("mail.smtp.host", emailHost);
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.ssl", "true");
Authenticator authenticator = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
String userId = "faJianRen@YouXiang.DiZhi";
String password = "PassWord";
return new PasswordAuthentication(userId, password);
}
};
Session session = Session.getInstance(props, authenticator);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(fromEmail));
/*
设置多收件人，Message.RecipientType.CC:密送
Message.RecipientType.BCC:抄送
Message.RecipientType.TO：收件人
*/
List<String> emails = new ArrayList<>();
String[] emailArrays = toEmail.split(" ");
int a = emailArrays.length;
for (String email : emailArrays) {
emails.add(email);
}
message.addRecipients(Message.RecipientType.TO, setRecipientT0(emails));
message.setSubject(subject);
StringBuffer buffer = new StringBuffer();
buffer.append("BEGIN:VCALENDAR\n"
+ "PRODID:-//Microsoft Corporation//Outlook 9.0 MIMEDIR//EN\n"
+ "VERSION:2.0\n"
+ "METHOD:REQUEST\n" //METHOD:CANCEL 取消会议 METHOD:REQUEST 创建和更新会议
+ "BEGIN:VEVENT\n"
+ "ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:" + toEmail + "\n"
+ "ORGANIZER:MAILTO:" + toEmail + "\n"
+ "DTSTART:" + getUtc(valarmDt + " 08:00") + "\n"
+ "DTEND:" + getUtc(valarmDt + " 19:00") + "\n"
+ "LOCATION:" + location + "\n"
+ "UID:" + UUID.randomUUID().toString() + "\n"//如果id相同的话，outlook会认为是同一个会议请求，所以使用uuid。
+ "CATEGORIES:待办提醒\n"
+ "DESCRIPTION:" + emailContent + "\n\n" // 会议内容换行为\\n
+ "SUMMARY:汇总 \n" + "PRIORITY:5\n"
+ "CLASS:PUBLIC\n" + "BEGIN:VALARM\n"
+ "TRIGGER:-PT15M\n" + "ACTION:DISPLAY\n"
+ "DESCRIPTION:Reminder\n" + "END:VALARM\n"
+ "END:VEVENT\n" + "END:VCALENDAR");
BodyPart messageBodyPart = new MimeBodyPart();
// 测试下来如果不这么转换的话，会以纯文本的形式发送过去，
//如果没有method=REQUEST;charset=\"UTF-8\"，outlook会议附件的形式存在，而不是直接打开就是一个会议请求
messageBodyPart.setDataHandler(new DataHandler(new ByteArrayDataSource(buffer.toString(),
"text/calendar;method=REQUEST;charset=\"UTF-8\"")));
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
// 添加附件
String[] paths = { "D:\\log\\2020-6-30.log", "D:\\log\\2020-7-1.log" };
for (String filePath : paths) {
MimeBodyPart part = new MimeBodyPart();
FileDataSource fds = new FileDataSource(filePath);
part.setFileName(MimeUtility.encodeWord(fds.getName()));// MimeUtility.encodeWord文件名解决中文乱码
part.setDataHandler(new DataHandler(fds));
multipart.addBodyPart(part);
}
message.setContent(multipart);
Transport.send(message);
} catch (Exception ex) {
ex.printStackTrace();
}
}
/*** 设置收件人/抄送人/密送人地址信息*/
private InternetAddress[] setRecipientT0(List<String> recipientT0List) throws Exception {
if (recipientT0List.size() > 0) {
InternetAddress[] sendTo = new InternetAddress[recipientT0List.size()];
for (int i = 0; i < recipientT0List.size(); i++) {
System.out.println("发送到:" + recipientT0List.get(i));
sendTo[i] = new InternetAddress(recipientT0List.get(i), "", "UTF-8");
}
return sendTo;
}
return null;
}
/**
* 转utc时间
*/
private static String getUtc(String str) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm");
long millionSeconds = 0;
millionSeconds = sdf.parse(str).getTime();
//utc时间差8小时
long currentTime = millionSeconds - 8 * 60 * 60 * 1000;
Date date = new Date(currentTime);
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String nowTime = df.format(date);
String utcTime = nowTime.replace("-", "").replace(" ", "T").replace(":", "");
return utcTime;
}
public static void main(String[] args) {
try {
Email email = new Email();
String fromEmail = "faJianRen@YouXiang.DiZhi";
String toEmail = "XIAGUANGHUI@houzhui.com";
String emailPort = "25";
String emailHost = "10.8.88.88";
String valarmDt = "20200910";
String subject = "subject产品到期提醒20200909";
String location = "1号会议室（此处完全可以写成自定义的内容，不必拘泥于会议邀约）";
String emailContent = "2020-0001|产品1|2020-08-30|200000.00|固定分配|李飞\\n" +
"2020-0002|产品2|2020-08-30|200000.00|固定分配2|李飞2";
email.send(fromEmail, toEmail, emailPort, emailHost, valarmDt, subject, location, emailContent);
System.out.println("success");
System.out.println(System.currentTimeMillis());
} catch (Exception e) {
e.printStackTrace();
}
}
}
效果展示（outlook邮箱）：
outlook会议邀约效果展示
2.使用kettle java代码组件发送会议邀约
说明：我的kettle版本8.2，在开发前，需copy到依赖的jar包到kettle\data-integration\lib目录下，依赖jar包分别为javaws.jar、javax.mail.jar、rt.jar。
kettle
java代码：
// 导入依赖jar
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.util.ByteArrayDataSource;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
public boolean processRow(StepMetaInterface smi, StepDataInterface sdi) throws Exception {
Object[] r = getRow();
if (r == null) {
setOutputDone();
return false;
}
String haha;
if (first) {
first = false;
}
Object[] outputRow = createOutputRow(r, data.outputRowMeta.size());
String fromEmail = "faJianRen@YouXiang.DiZhi";
String toEmail = getParameter("toEmail");
String valarmDt = getParameter("valarmDt");
String emailContent = null;
String dqCount = getParameter("DQCOUNT");
int count = Integer.parseInt(dqCount);
if(count > 20){
emailContent = valarmDt+"存在" + dqCount + "个产品项目到期，具体详情请查看附件！";
}else{
emailContent = "产品到期列表如下：\\n" + get(Fields.In, "content_dqtx").getString(r);
}
String result = send(fromEmail, toEmail, valarmDt, emailContent);
//get(Fields.Out, "RESULTMSG").setValue(outputRow, result); //输出参数
putRow(data.outputRowMeta, outputRow);
return true;
}
private class EmailAuthenticator extends Authenticator {
protected PasswordAuthentication getPasswordAuthentication() {
String userId = "faJianRen@YouXiang.DiZhi";
String password = "PASSWORD";
return new PasswordAuthentication(userId, password);
}
}
public String send(String fromEmail, String toEmail, String valarmDt, String emailContent) {
try {
Properties props = new Properties();
try {
props.put("mail.smtp.port", "25");
props.put("mail.smtp.host", "10.8.88.88");
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.ssl", "true");
} catch (Exception e) {
e.printStackTrace();
return "-1";
}
Session session;
Authenticator authenticator = new EmailAuthenticator();
session = Session.getInstance(props, authenticator);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(fromEmail));
//message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmail));
List emails = new ArrayList();
String[] emailArrays = toEmail.split(" ");
for (int i = 0; i < emailArrays.length; i++) {
emails.add(emailArrays[i]);
}
message.addRecipients(Message.RecipientType.TO,setRecipientT0(emails));
message.setSubject("产品到期提醒");
StringBuffer buffer = new StringBuffer();
buffer.append("BEGIN:VCALENDAR\n"
+ "PRODID:-//Microsoft Corporation//Outlook 9.0 MIMEDIR//EN\n"
+ "VERSION:2.0\n"
+ "METHOD:REQUEST\n"
+ "BEGIN:VEVENT\n"
+ "ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:" + toEmail + "\n"
+ "ORGANIZER:MAILTO:" + toEmail + "\n"
+ "DTSTART:" + getUtc(valarmDt + " 09:00") + "\n"
+ "DTEND:" + getUtc(valarmDt + " 09:30") + "\n"
+ "LOCATION:到期提醒\n"
+ "UID:" + UUID.randomUUID().toString() + "\n"//如果id相同的话，outlook会认为是同一个会议请求，所以使用uuid。
+ "CATEGORIES:待办提醒\n"
+ "DESCRIPTION:" + emailContent + "\n\n"
+ "SUMMARY:产品到期提醒\n" + "PRIORITY:5\n"
+ "CLASS:PUBLIC\n" + "BEGIN:VALARM\n"
+ "TRIGGER:-PT15M\n" + "ACTION:DISPLAY\n"
+ "DESCRIPTION:Reminder\n" + "END:VALARM\n"
+ "END:VEVENT\n" + "END:VCALENDAR");
BodyPart messageBodyPart = new MimeBodyPart();
// 测试下来如果不这么转换的话，会以纯文本的形式发送过去，
//如果没有method=REQUEST;charset=\"UTF-8\"，outlook会议附件的形式存在，而不是直接打开就是一个会议请求
messageBodyPart.setDataHandler(new DataHandler(new ByteArrayDataSource(buffer.toString(),
"text/calendar;method=REQUEST;charset=\"UTF-8\"")));
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
MimeBodyPart part = new MimeBodyPart();
FileDataSource fds = new FileDataSource("D:\\upload\\kettle_job\\\product_dqfp_rili_tixing\\产品到期项目列表.xls");
part.setFileName(MimeUtility.encodeWord(fds.getName()));// MimeUtility.encodeWord文件名解决中文乱码
part.setDataHandler(new DataHandler(fds));
multipart.addBodyPart(part);
message.setContent(multipart);
Transport.send(message);
} catch (MessagingException me) {
me.printStackTrace();
return me.getMessage();
} catch (Exception ex) {
ex.printStackTrace();
return "-3";
}
return "Success";
}
private InternetAddress[] setRecipientT0(List recipientT0List) throws Exception {
if (recipientT0List.size() > 0) {
InternetAddress[] sendTo = new InternetAddress[recipientT0List.size()];
for (int i = 0; i < recipientT0List.size(); i++) {
System.out.println("发送到:" + recipientT0List.get(i));
sendTo[i] = new InternetAddress(recipientT0List.get(i).toString(), "", "UTF-8");
}
return sendTo;
}
return null;
}
/**
* 转utc时间
*/
private static String getUtc(String str) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm");
long millionSeconds = 0;
try {
millionSeconds = sdf.parse(str).getTime();
} catch (ParseException e1) {
e1.printStackTrace();
}
//utc时间差8小时
long currentTime = millionSeconds - 8 * 60 * 60 * 1000;
Date date = new Date(currentTime);
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String nowTime = df.format(date);
String utcTime = nowTime.replace("-", "").replace(" ", "T").replace(":", "");
return utcTime;
}
在使用kettle的java代码组件时，发现如下小坑，在此总结说明一下，以防后面开发重复踩坑:
(1) 不支持@override注解，故以上代码EmailAuthenticator，没有使用内部类的方式进行初始化；
(2) 无法识别泛型的尖括号<>，可以观察到，原本应该使用泛型的地方，都删除掉了泛型。
3.参考资料
https://blog.csdn.net/han949417140/article/details/90206475
https://www.cnblogs.com/lyxy/p/4568820.html
https://blog.csdn.net/zccbbg/article/details/84162162
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