javamail 发送邮件 jsp/servlet_javaweb用jsp+servlet包含邮件的发送-优快云博客

本文链接：https://blog.youkuaiyun.com/java2333/article/details/81533968

非纯原创在其他代码上修改而来可实现发送多个附件可给多个人发送用，分割

jar包 mail.jar commons-lang3-3.7.jar commons-io-2.6.jar commons-fileupload-1.3.3.jar

JSP

<%@ page language="java" import="java.util.*" contentType="text/html; charset=GBK" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<html>
<head>
<base href="<%=basePath%>">

<title>EMAIL</title>
</head>

<body>
<div align="center">

SendAttachment

package com.itth.mail;

import java.io.IOException;
import java.io.PrintWriter;

import java.io.File;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeUtility;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.*;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.itth.mail.AttachmentSender;

public class SendAttachment extends HttpServlet {

/**
* Constructor of the object.
*/
public SendAttachment() {
super();
}

/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
   response.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
URLEncoder.encode("GBK");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC /'-//W3C//DTD HTML 4.01 Transitional//EN/'>");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
   response.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
URLEncoder.encode("GBK");
PrintWriter out = response.getWriter();

//set the smtp address of sina
String host = "smtp.etrustpower.com";
//set mailbox accountName
String accountName = "wangyinglu@etrustpower.com";
//set mailbox password
String password = "E3oTkDBksSNUcVmd";
//attachment
File uploadedFile = null;
//sender's address
String from = "";
//recipient's address
String to = "";
//mail subject
String subject = "";
//mail content
String content = "";
String fileName= null;
//upload the attachment to the server first
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
Iterator items;
String savePath = this.getServletContext().getRealPath("/upload");
File file = new File(savePath);
//判断上传文件的保存目录是否存在
if (!file.exists() && !file.isDirectory()) {
System.out.println(savePath+"目录不存在，需要创建");
//创建目录
file.mkdir();
}
if(isMultipart){
try{
items = upload.parseRequest(request).listIterator();
while(items.hasNext()){
FileItem item = (FileItem) items.next();
if(!item.isFormField()){
//get the name of the upload file
String name = item.getName();
fileName = name.substring(name.lastIndexOf("//")+1,name.length());

//upload the file
uploadedFile = new File(savePath+"/"+fileName); //设置文件保存路径
if(fileName.length()>0){
   item.write(uploadedFile); //写入文件
}

// File file=uploadedFile.getAbsoluteFile();
}else if(item.isFormField()){
//get the parameter from the form
if(item.getFieldName().equals("from")){
from = item.getString();
}
else if(item.getFieldName().equals("to")){
to = item.getString();
}
else if(item.getFieldName().equals("subject")){
subject = item.getString();
}
else if(item.getFieldName().equals("content")){
content =item.getString();
}
}
}
}catch(Exception e){
e.printStackTrace();
}

}


//System.out.println(to);
File[] fs = file.listFiles(); //遍历上传文件夹中所有的文件
/*for (File f : fs){
System.out.println(f.getName()+" name");
System.out.println(f.getPath()+" path");

} */
List<String> attachment1=new ArrayList<String>();
//set mail info
AttachmentSender sender = new AttachmentSender(host,accountName,password);
sender.setFrom(from);
sender.setSubject(subject);

//sender.setTo(a);
sender.Address(to);
sender.setContent(content);
if(uploadedFile != null){

   for (File f : fs){
       String attachment = f.getPath();
       attachment1.add(attachment);
       // System.out.println(attachment+" attachment");

}
   /* for(String a : attachment1){

       System.out.println(a+" attachment1");
   }*/
   sender.addAttachMent(attachment1);
}

//print the result
if(sender.send()){
out.print("Send mail successfully!");
}
else{
out.print("Send mail failed!");
}
//delete the file on the server after send the mail
if(uploadedFile.exists()) //删除发送过的附件
   for (File f : fs){
       f.delete();
}
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}

}

AttachmentSender

package com.itth.mail;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
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 sun.misc.BASE64Encoder;

public class AttachmentSender {
private MimeMessage message;
private Properties props;
private Session session;
private MimeMultipart mp;
private String name = "";
private String password = "";
private static InternetAddress[] address=null;

/**
* complete the initialization
* @param host
* @param name
* @param password
*/
public AttachmentSender(String host, String name, String password){
this.name = name;
this.password = password;
props = System.getProperties();
//set the SMTP host
props.put("mail.smtp.host", host);
//set SMTP authorization
props.put("mail.smtp.auth", "true");
//get the mail session
MyAuthenticator auth = new MyAuthenticator(name,password);
session = Session.getDefaultInstance(props,auth);
//create MIME mail object
message = new MimeMessage(session);
mp = new MimeMultipart();
}

/**
* set mail sender
* @param from
*/
public void setFrom(String from){
try {
message.setFrom(new InternetAddress(from));
} catch (AddressException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/**
* set mail recipient
* @param address
*/
/*public void setTo(InternetAddress[] address){
try {
   //System.out.println(to+"2");
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(address));

} catch (AddressException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} */
public static InternetAddress[] Address(String to){
   //多个接收账号
   try {
   List list = new ArrayList();//不能使用string类型的类型，这样只能发送一个收件人
   String []median=to.split(",");//对输入的多个邮件进行逗号分割
   for(int i=0;i<median.length;i++){
   list.add(new InternetAddress(median[i]));
   System.out.println(median[i]);
   }
   address =(InternetAddress[])list.toArray(new InternetAddress[list.size()]);

   } catch (AddressException e) {
   e.printStackTrace();
   }
   return address;
   }
/**
* set mail subject
* @param subject
* @throws UnsupportedEncodingException
*/

public void setSubject(String subject) throws UnsupportedEncodingException{
try {
   message.setSubject(MimeUtility.encodeText("任务系统") );

} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/**
* set the mail content
* @param content
*/
public void setContent(String content){
try{
BodyPart bp = new MimeBodyPart();
bp.setContent(content,"text/html");
mp.addBodyPart(bp);
}catch(Exception e){
e.printStackTrace();
}
}

/**
* attach the file
* @param filename
*/
public void addAttachMent(List<String> attachment1){
try{
   //System.out.println(filename);

int i=0;
for(String a : attachment1){
   BodyPart bp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(a);
    bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(MimeUtility.encodeText(fileds.getName(),MimeUtility.mimeCharset("gbk"), null));
   mp.addBodyPart(bp,i);
i++;
    }

}catch(Exception e){
e.printStackTrace();
}

}

/**
* send mail
* @return
*/
public boolean send(){
   try{
message.setContent(mp);
message.saveChanges();
//create SMTP sender object
Transport transport = session.getTransport("smtp");
//get the connection with server
transport.connect((String) props.get("mail.smtp.host"),name,password);
//send the mail via server
transport.sendMessage(message, address);
transport.close();
return true;
}catch(NoSuchProviderException e){
e.printStackTrace();
return false;
}catch (MessagingException e){
e.printStackTrace();
return false;
}
}
}

/**
* send mail
* @return
*/
public boolean send(){
try{

message.setContent(mp);
message.saveChanges();
//create SMTP sender object
Transport transport = session.getTransport("smtp");
//get the connection with server
transport.connect((String) props.get("mail.smtp.host"),name,password);
//send the mail via server
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
return true;
}catch(NoSuchProviderException e){
e.printStackTrace();
return false;
}catch (MessagingException e){
e.printStackTrace();
return false;
}
}
}

MyAuthenticator

package com.itth.mail;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MyAuthenticator extends Authenticator{
String name;
String password;

public MyAuthenticator(String name, String password){
this.name = name;
this.password = password;
getPasswordAuthentication();
}
protected PasswordAuthentication getPasswordAuthentication(){
return new PasswordAuthentication(name,password);
}
}