javaMail收取邮件附件 java邮件发送带附件

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mob64ca14068b0b 2023-09-21 23:20:45

文章标签 javaMail收取邮件附件 JavaMail fckeditor 附件上传 cuisuqinag 文章分类 Java 后端开发

这里使用的是JavaMail技术，前台使用了fckeditor做邮件美化，由于只是示例，后台发送时只是将邮件保存在本地，但是可以查看，如果需要实际发送，请参考我的其他博客文章，我写了很多关于邮件发送的示例！

JSP页面页面除了引用fckeditor外，要注意我们是需要发送附件的：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <title>发送邮件</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<script type="text/javascript" src="fckeditor/fckeditor.js"></script>
	<script type="text/javascript">
	window.οnlοad=function(){
		var oFCKeditor = new FCKeditor( 'content' ) ;
		//编译器基本路径
		oFCKeditor.BasePath	= "/pro_04/fckeditor/";
		//高度
		oFCKeditor.Width=800;
		//宽度
		oFCKeditor.Height=300;
		//工具条集合名称(Default,Basic或自己制定，关于ＦＣＫ的使用，博客内有专门文章)
		//具体的配置可以将默认显示出来然后到FCK目录里的fckconfig.js里
		//FCKConfig.ToolbarSets["Default"]数组中去除不要的功能一共63个功能属性
		//oFCKeditor.ToolbarSet="Basic";
		oFCKeditor.ReplaceTextarea() ;    		
	}
	</script>
  </head>
  <body>
  	<!-- 注意表单格式，这里需要上传附件 -->
    <form action="SendMailServlet" method="post"  enctype="multipart/form-data">
    <table>
    	<tr>
    		<td>收件人：</td>
    		 <td><input type="text" name="to" /></td>
    	</tr>
    	<tr>
    		<td>抄送：</td>
    		 <td><input type="text" name="copy" /></td>
    	</tr>
    	<tr>
    		<td>主题：</td>
    		 <td><input type="text" name="title" /></td>
    	</tr>
    	<tr>
    		<td>信件内容：</td>
    		<td><textarea rows="10" cols="20" name="content" id="content"></textarea></td>
    	</tr>
    	<tr>
    		<td>附件：</td>
    		<td><input type='file' name='ufile' /></td>
    	</tr>
    	<tr>
    		<td>背景音乐：</td>
    		<td><input type='file' name='umusic' /></td>
    	</tr>
    	<tr>
    		<td>背景图片：</td><!-- 背景图片我们后台自己准备 -->
    		<td>
    			<select name="bgimg">
    				<option value="1">一号</option>
    				<option value="2">二号</option>
    			</select>
    		</td>
    	</tr>
    	<tr align="right">
    		<td colspan="2"><input type="submit" value="发 送"></td>
    	</tr>
    </table>	    
    </form>
  </body>
</html>

为了防止乱码，会经过一个过滤器：

package org.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
 * 过滤器防止乱码
 * @说明 
 * @author cuisuqiang
 * @version 1.0
 * @since
 */
public class EncodingFilter implements Filter {
	public void destroy() {
	}
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		chain.doFilter(request, response);
	}
	public void init(FilterConfig arg0) throws ServletException {
	}
}

然后到Servlet处理附件和信息，这里就不做异常处理了，出错直接报错：

package org.servlet;
import java.io.*;
import java.util.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.entity.MailModel;
import org.mail.SendMail;
/**
 * 接收表单，处理附件，组装邮件对象，并调用发送接口
 * @说明 在C盘创建临时文件
 * @author cuisuqiang
 * @version 1.0
 * @since
 */
@SuppressWarnings("serial")
public class SendMailServlet extends HttpServlet {
	@SuppressWarnings( { "unchecked", "deprecation" })
	@Override
	protected void service(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// 建立磁盘工厂
		FileItemFactory factory = new DiskFileItemFactory();
		// 表单域
		ServletFileUpload upload = new ServletFileUpload(factory);
		List<FileItem> items = null;
		String bgimg = "1"; // 默认是第一个背景图片
		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e) {
			e.printStackTrace();
		}
		MailModel mail = new MailModel();
		InputStream is = null;
		for (FileItem item : items) {
			if (!item.isFormField()) { // 如果是附件
				if (item.getSize() > 0) {
					is = item.getInputStream();
					String filename = "";
					if (item.getName().indexOf("\\") == -1) {
						filename = "c:\\tmp\\" + item.getName();
					} else {
						filename = "c:\\tmp\\" + item.getName().substring(item.getName().lastIndexOf("\\"));
					}
					if (is.markSupported()) {
						System.out.println("没有上传文件或文件已经删除");
					} else {
						File file = new File(filename);
						FileOutputStream fos = new FileOutputStream(file); // 建立输出流
						byte[] buffer = new byte[8192]; // 每次读8K字节，大文件上传没有问题
						int count = 0;
						while ((count = is.read(buffer)) > 0) { // 循环写入到硬盘
							fos.write(buffer, 0, count);
						}
						fos.close(); // 关闭输入输出流
						is.close();
						if (item.getFieldName().equals("ufile")) {
							mail.setFilePath(filename);
						} else if (item.getFieldName().equals("umusic")) {
							mail.setMusicPath(filename);
						}
					}
				}
			} else { // 处理文本信息
				if (item.getFieldName().equals("title")) {
					mail.setTitle(item.getString("UTF-8"));
				} else if (item.getFieldName().equals("content")) {
					mail.setContext(item.getString("UTF-8"));
				} else if (item.getFieldName().equals("to")) {
					mail.setTo(item.getString("UTF-8"));
				} else if (item.getFieldName().equals("copy")) {
					mail.setCopy(item.getString("UTF-8"));
				} else if (item.getFieldName().equals("bgimg")) {
					bgimg = item.getString("UTF-8");
				}
			}
		}
		String bgPath = request.getRealPath("/") + "\\images\\bg" + bgimg + ".jpg";
		mail.setBgPath(bgPath);
		try {
			SendMail.sendMail(mail);
		} catch (Exception e) {
			e.printStackTrace();
		}
		response.sendRedirect(request.getContextPath() + "/sendmail.jsp");
	}
}

这里也没有验证，接收到信息后组装一个邮件实体对象，传递到发送接口中发送：

实体，我就不写ｇｅｔ和ｓｅｔ方法了：

package org.entity;
/**
 * 一封邮件的对象
 * @说明 
 * @author cuisuqiang
 * @version 1.0
 * @since
 */
public class MailModel {
	/**
	 * 主键
	 */
	private int id;

	/**
	 * 邮件标题
	 */
	private String title;

	/**
	 * 发送给谁
	 */
	private String to;

	/**
	 * 背景图片地址
	 */
	private String bgPath;

	/**
	 * 抄送给谁
	 */
	private String copy;

	/**
	 * 邮件内容
	 */
	private String context;

	/**
	 * 附件地址
	 */
	private String filePath;
	/**
	 * 背景音乐地址
	 */
	private String musicPath;
}

然后我们来看看核心处理类：

package org.mail;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import org.entity.MailModel;
/**
 * 发送一封邮件
 * @说明 注意这里并没有实际发送而是保存在了C盘临时文件中，真是发送的话，请参考我的博客
 * @author cuisuqiang
 * @version 1.0
 * @since
 */
public class SendMail {
	public static void sendMail(MailModel mail) throws Exception {
		Properties props = new Properties();
		props.put("mail.smtp.auth", "true");
		Session session = Session.getInstance(props);
		Message message = new MimeMessage(session);
		InternetAddress from = new InternetAddress();
		from.setPersonal(MimeUtility.encodeText("风中落叶<cuisuqiang@163.com>"));
		message.setFrom(from);
		InternetAddress to = new InternetAddress(mail.getTo());
		message.setRecipient(Message.RecipientType.TO, to);
		// 是否抄送
		if (null != mail.getCopy() && !"".equals(mail.getCopy())) {
			InternetAddress copy = new InternetAddress(mail.getCopy());
			message.setRecipient(Message.RecipientType.CC, copy);
		}
		message.setSubject(MimeUtility.encodeText(mail.getTitle()));
		message.setSentDate(new Date());
		// 指定为混合关系
		MimeMultipart msgMultipart = new MimeMultipart("mixed");
		message.setContent(msgMultipart);
		MimeBodyPart content = new MimeBodyPart();
		msgMultipart.addBodyPart(content);
		// 依赖关系
		MimeMultipart bodyMultipart = new MimeMultipart("related");
		content.setContent(bodyMultipart);
		MimeBodyPart htmlPart = new MimeBodyPart();
		// 组装的顺序非常重要
		bodyMultipart.addBodyPart(htmlPart);
		MimeBodyPart in_bg = new MimeBodyPart();
		bodyMultipart.addBodyPart(in_bg);

		DataSource bgsou = new FileDataSource(mail.getBgPath());
		DataHandler bghd = new DataHandler(bgsou);
		in_bg.setDataHandler(bghd);
		in_bg.setHeader("Content-Location", "bg.jpg");
		// 是否使用了背景音乐
		if (null == mail.getMusicPath() || "".equals(mail.getMusicPath())) {
			String start = "<html><body background='bg.jpg'>";
			String end = "</body></html>";
			htmlPart.setContent(start + mail.getContext() + end,"text/html;charset=UTF-8");
		} else {
			MimeBodyPart in_Part = new MimeBodyPart();
			bodyMultipart.addBodyPart(in_Part);
			DataSource gifds = new FileDataSource(mail.getMusicPath());
			DataHandler gifdh = new DataHandler(gifds);
			in_Part.setDataHandler(gifdh);
			in_Part.setHeader("Content-Location", "bg.mp3");
			String start = "<html><head><bgsound src='bg.mp3' loop='-1'></head><body background='bg.jpg'>";
			String end = "</body></html>";
			htmlPart.setContent(start + mail.getContext() + end,"text/html;charset=UTF-8");
		}
		// 组装附件
		if (null != mail.getFilePath() && !"".equals(mail.getFilePath())) {			
			MimeBodyPart file = new MimeBodyPart();
			FileDataSource file_datasource = new FileDataSource(mail
					.getFilePath());
			DataHandler dh = new DataHandler(file_datasource);
			file.setDataHandler(dh);
			file.setFileName(MimeUtility.encodeText(dh.getName()));
			msgMultipart.addBodyPart(file);
		}
		message.saveChanges();
		// 保存邮件
		OutputStream ips = new FileOutputStream("C:\\tmp\\test.eml");
		message.writeTo(ips);
		ips.close();
		System.out.println("------------发送完毕------------");
		// 删除临时文件
		if (null != mail.getMusicPath() && !"".equals(mail.getMusicPath())) {
			File file = new File(mail.getMusicPath());
			file.delete();
		}
		if (null != mail.getFilePath() && !"".equals(mail.getFilePath())) {
			File file = new File(mail.getFilePath());
			file.delete();
		}
	}
}

我们把邮件发送了C盘，可以到C盘查看，如果需要实际发送，可以参考我的其他博客，有专门说明！

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