---
title: 'Spring Boot 寄信'
disqus: hackmd
---
###### tags: `SpringBoot`
Spring Boot 寄信
===

[TOC]

# 適用場景

分成兩種cases

1. 需要在信件中附上html content在裡面
2. 需要在信件中附上html content在裡面，且夾帶檔案

# 思考路徑

# 檔案結構目錄

# 程式碼部分

## 寄信的主體

package com.allproducts.ai_center.business.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.collections.map.HashedMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.allproducts.ai_center.email.service.MailHTMLContentBuilder;
import com.allproducts.ai_center.exportdatabean.JoinAI_RatioBean;

import Module.Email.Utility.EmailService.EmailService;

@Service
public class DemoThymeleafTable_SERVICE {
	
	private static Logger logger = LoggerFactory.getLogger(DemoThymeleafTable_SERVICE.class);
	
	@Autowired
	EmailService emailService;
	
	@Autowired
	MailHTMLContentBuilder mailHTMLContentBuilder; // help us use thylmeleaf
	
	public void sayHI() {
		
		logger.info("HI");
		System.out.println("HI");
	}
	
	public List <JoinAI_RatioBean> giveMeJoinAI_RatioBeanListData( ) {
		
		List <JoinAI_RatioBean> myList = new ArrayList<JoinAI_RatioBean>() ;
		
		JoinAI_RatioBean data1= new JoinAI_RatioBean("A","AP1583","mike",0,0, null );
		JoinAI_RatioBean data2= new JoinAI_RatioBean("A","AP1582","sandy",85,90, null );
		JoinAI_RatioBean data3= new JoinAI_RatioBean("B","AP1587","mike",52,25, null );
		JoinAI_RatioBean data4= new JoinAI_RatioBean("B","AP1587","Robin",52,25, null );
		JoinAI_RatioBean data5= new JoinAI_RatioBean("B","AP1587","ELmo",52,25, null );
		myList.add(data1);
		myList.add(data2);
		myList.add(data3);
		myList.add(data4);
		myList.add(data5);

		return myList;
	}
	
	
	public void demoThymeleafTemplateWithTable() {
		
		String[] toPrimaryString =new String[] {"[e-mail]","[e-mail]"};
		String[] toCcStrings =null;
		String subjectString ="Demo Sending HTML";
		
		String templateFilePathString="DemoThymeleafTemplateWithTableControl.html";
		
		//Data 
		List <JoinAI_RatioBean> myDataList = giveMeJoinAI_RatioBeanListData( );
		
		for (JoinAI_RatioBean each: myDataList) {
			logger.info(each.toString());
		}
		
		// Thymeleaf model
		Map<String, Object> templateModelValueMap=new HashMap<>();
		
		templateModelValueMap.put("title", "d");
		templateModelValueMap.put("mydataList", myDataList);
		
		String mailHTMLBodyString=mailHTMLContentBuilder.generateMailContent(templateFilePathString, templateModelValueMap);
		emailService.sendHTMLMail(subjectString,mailHTMLBodyString,toPrimaryString);
		
		
	}
	
	public void demoThymeleafTemplateWithTable2() {
		
		String[] toPrimaryString =new String[] {"[e-mail]","[e-mail]"};
		String[] toCcStrings =null;
		String subjectString ="Demo Sending HTML";
		
		String templateFilePathString="DemoThymeleafTemplateWithTableControl.html";
		
		//Data 
		List <JoinAI_RatioBean> myDataList = giveMeJoinAI_RatioBeanListData( );
		
		for (JoinAI_RatioBean each: myDataList) {
			logger.info(each.toString());
		}
		
		// Thymeleaf model
		Map<String, Object> templateModelValueMap=new HashMap<>();
		
		templateModelValueMap.put("title", "d");
		templateModelValueMap.put("mydataList", myDataList);
		
		String mailHTMLBodyString=mailHTMLContentBuilder.generateMailContent(templateFilePathString, templateModelValueMap);
		emailService.sendHTMLMail(subjectString,mailHTMLBodyString,toPrimaryString);
		
		
	}
	
}

## MailHTMLContentBuilder

package com.allproducts.ai_center.email.service;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
@Service
public class MailHTMLContentBuilder {
	
	Logger LOG = LoggerFactory.getLogger(MailHTMLContentBuilder.class);
	
	private TemplateEngine templateEngine;
	
	@Autowired
    public MailHTMLContentBuilder(TemplateEngine templateEngine) {
        this.templateEngine = templateEngine;
    }

    public String generateMailContent(String templateFilePath, Map<String, Object> templateModelValueMap) {
        Context context = new Context();
        context.setVariables(templateModelValueMap);
        
        return templateEngine.process(templateFilePath, context);
    }

}

## EmailService

package Module.Email.Utility.EmailService;

import java.io.File;
import java.nio.charset.StandardCharsets;
import java.util.List;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Service
public class EmailService {
	
	Logger logger = LoggerFactory.getLogger(EmailService.class);
	
	@Autowired
	private JavaMailSender javaMailSender;
	
	
	public void sendMail(String subject, String mailContent, String... toEmail) {
		try {
			SimpleMailMessage mailMessage = new SimpleMailMessage();
	        mailMessage.setTo(toEmail);
	        mailMessage.setSubject(subject);
	        mailMessage.setText(mailContent);
	        mailMessage.setFrom("[e-mail]");
	        javaMailSender.send(mailMessage); 
	    } catch(Exception e) {
	    	logger.error("[EmailService]--sendMail() Exception happened...");
	    	logger.error(e.toString());
	    }
    }//End function
	
	public void sendAttachmentsMail(String subject, String mailContent, List<EmailAttachFileBean> attachFilesBean, String... toEmail) {
		try {
			System.setProperty("mail.mime.splitlongparameters", "false");
			MimeMessage mimeMessage = javaMailSender.createMimeMessage();
			MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,StandardCharsets.UTF_8.name());
			helper.setTo(toEmail);
			helper.setSubject(subject);
			helper.setText(mailContent);
			helper.setFrom("[e-mail]");
			
			for(EmailAttachFileBean eachAttachedFile : attachFilesBean) {
				FileSystemResource file = new FileSystemResource(new File(eachAttachedFile.getFileFullPath()));
				helper.addAttachment(MimeUtility.encodeWord(eachAttachedFile.getFileName(),"utf-8","B"), file);
			}

			javaMailSender.send(mimeMessage);
		} catch(Exception e) {
	    	logger.error("[EmailService]--sendAttachmentsMail() Exception happened...");
	    	logger.error(e.toString());
	    }
	}//End function
	
	
	public void sendHTMLMail(String subject, String mailContent, String... toEmail) {
		try {
			MimeMessage mimeMessage = javaMailSender.createMimeMessage();
			MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,StandardCharsets.UTF_8.name());
			helper.setTo(toEmail);
			helper.setSubject(subject);
			helper.setText(mailContent,true);
			helper.setFrom("[e-mail]");
	        javaMailSender.send(mimeMessage);
		} catch(Exception e) {
	    	logger.error("[EmailService]--sendHTMLMail() Exception happened...");
	    	logger.error(e.toString());
	    }
    }//End
	
	
	public void sendHTMLWithAttachmentsMail(String subject, String mailContent, List<EmailAttachFileBean> attachFilesBean, String... toEmail) {
		try {
			System.setProperty("mail.mime.splitlongparameters", "false");
			MimeMessage mimeMessage = javaMailSender.createMimeMessage();
			MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,StandardCharsets.UTF_8.name());
			helper.setTo(toEmail);
			helper.setSubject(subject);
			helper.setText(mailContent, true);
			helper.setFrom("[e-mail]");
			
			for(EmailAttachFileBean eachAttachedFile : attachFilesBean) {
				FileSystemResource file = new FileSystemResource(new File(eachAttachedFile.getFileFullPath()));
				helper.addAttachment(MimeUtility.encodeWord(eachAttachedFile.getFileName(),"utf-8","B"), file);
			}

			javaMailSender.send(mimeMessage);
		} catch(Exception e) {
	    	logger.error("[EmailService]--sendHTMLWithAttachmentsMail() Exception happened...");
	    	logger.error(e.toString());
	    }
	}//End function

}//End class

## EmailAttachFileBean

package Module.Email.Utility.EmailService;

public class EmailAttachFileBean {

	private String fileFullPath;

	private String fileName;

	private String fileTypeExtension;

	private String inlineContentId;

	public EmailAttachFileBean() {
		super();
		// TODO Auto-generated constructor stub
	}

	public EmailAttachFileBean(String fileFullPath, String fileName, String fileTypeExtension, String inlineContentId) {
		super();
		this.fileFullPath = fileFullPath;
		this.fileName = fileName;
		this.fileTypeExtension = fileTypeExtension;
		this.inlineContentId = inlineContentId;
	}

	public String getFileFullPath() {
		return fileFullPath;
	}

	public void setFileFullPath(String fileFullPath) {
		this.fileFullPath = fileFullPath;
	}

	public String getFileName() {
		return fileName;
	}

	public void setFileName(String fileName) {
		this.fileName = fileName;
	}

	public String getFileTypeExtension() {
		return fileTypeExtension;
	}

	public void setFileTypeExtension(String fileTypeExtension) {
		this.fileTypeExtension = fileTypeExtension;
	}

	public String getInlineContentId() {
		return inlineContentId;
	}

	public void setInlineContentId(String inlineContentId) {
		this.inlineContentId = inlineContentId;
	}

}// End class

# 參考連結