用javamail发送带附件的邮件-优快云博客

本文介绍了一套使用Java实现的邮件发送工具类，包括配置SMTP服务器、身份验证、附件处理等功能，并通过一个测试类展示了如何从配置文件读取参数并发送带有附件的HTML邮件。

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MailUtils代码

public class MailUtils {
// 定义发件人、收件人、SMTP服务器、用户名、密码、主题、内容等
private String displayName;
private String to;
private String cc;
private String from;
private String smtpServer;
private String username;
private String password;
private String subject;
private String content;
private boolean isAuth = false; //服务器是否要身份认证
private File filename;
private List<File> files = new ArrayList<File>(); //用于保存发送附件的文件名的集合
/**
* 设置SMTP服务器地址
*/
public void setSmtpServer(String smtpServer){
this.smtpServer=smtpServer;
}
/**
* 设置发件人的地址
*/
public void setFrom(String from){
this.from=from;
}
/**
* 设置抄送人的地址
*/
public void setCc(String cc) {
this.cc = cc;
}
/**
* 设置显示的名称
*/
public void setDisplayName(String displayName){
this.displayName=displayName;
}
/**
* 设置服务器是否需要身份认证
*/
public void setAuth(boolean isAuth){
this.isAuth=isAuth;
}
/**
* 设置E-mail用户名
*/
public void setUserName(String username){
this.username=username;
}
/**
* 设置E-mail密码
*/
public void setPassword(String password){
this.password=password;
}
/**
* 设置接收者
*/
public void setTo(String to){
this.to=to;
}
/**
* 设置主题
*/
public void setSubject(String subject){
this.subject=subject;
}
/**
* 设置主体内容
*/
public void setContent(String content){
this.content=content;
}
/**
* 该方法用于收集附件名
*/
public void addAttachfile(File fname){
files.add(fname);
}
/**
* 发送邮件
*/
public HashMap send(){
HashMap map=new HashMap();
map.put("success", "true");
String message="邮件发送成功！";
Session session=null;
Properties props = System.getProperties();
props.put("mail.smtp.host", smtpServer);
if(isAuth){ //服务器需要身份认证
props.put("mail.smtp.auth","true");
MailAuthenticator mailAuth=new MailAuthenticator(username,password);
session=Session.getDefaultInstance(props, mailAuth);
}else{
props.put("mail.smtp.auth","false");
session=Session.getDefaultInstance(props, null);
}
// session.setDebug(true);
Transport trans = null;
try {
Message msg = new MimeMessage(session);
try{
Address from_address = new InternetAddress(from, displayName);
msg.setFrom(from_address);
}catch(java.io.UnsupportedEncodingException e){
e.printStackTrace();
}
InternetAddress[] to_address=InternetAddress.parse(to);
msg.setRecipients(Message.RecipientType.TO,to_address);
InternetAddress[] cc_address=InternetAddress.parse(cc);
msg.setRecipients(Message.RecipientType.CC,cc_address);
msg.setSubject(subject);
Multipart mp = new MimeMultipart();
MimeBodyPart mbp = new MimeBodyPart();
mbp.setContent(content.toString(), "text/html;charset=gb2312");
mp.addBodyPart(mbp);
if(!files.isEmpty()){//有附件
for(int i=0;i<files.size();i++){
mbp=new MimeBodyPart();
filename=files.get(i); //选择出每一个附件名
FileDataSource fds=new FileDataSource(filename); //得到数据源
mbp.setDataHandler(new DataHandler(fds)); //得到附件本身并至入BodyPart
mbp.setFileName(fds.getName()); //得到文件名同样至入BodyPart
mp.addBodyPart(mbp);
}
}
msg.setContent(mp); //Multipart加入到信件
msg.setSentDate(new Date()); //设置信件头的发送日期
//发送信件
msg.saveChanges();
trans = session.getTransport("smtp");
trans.connect(smtpServer, username, password);
trans.sendMessage(msg, msg.getAllRecipients());
trans.close();
}catch(AuthenticationFailedException e){
map.put("success", "false");
message="邮件发送失败！错误原因：\n"+"身份验证错误!";
e.printStackTrace();
}catch (MessagingException e) {
message="邮件发送失败！错误原因：\n"+e.getMessage();
map.put("success", "false");
e.printStackTrace();
Exception ex = null;
if ((ex = e.getNextException()) != null) {
System.out.println(ex.toString());
ex.printStackTrace();
}
}
//System.out.println("\n提示信息:"+message);
map.put("message", message);
return map;
}
}

MailAuthenticator 代码

public class MailAuthenticator extends Authenticator
{
private String username,password;
public MailAuthenticator(String username,String password){
this.username = username;
this.password = password;
}
protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
return new javax.mail.PasswordAuthentication(username,password);
}
}

FileFilter 代码

public class FileFilter implements FilenameFilter {
String prefix,ext;
public FileFilter(String prefix,String ext) {
this.prefix=prefix;
this.ext=ext;
}
public boolean accept(File dir, String name) {
return name.startsWith(prefix) && name.endsWith(ext);
}
}

MailTest代码

public class MailTest {
static Logger logger = Logger.getLogger(MailTest.class);
/**
* @param args
*/
public static void main(String[] args) {
Properties props= new Properties();
Properties logProps= new Properties();
String configFile ="mailConfig.properties";
String logFile ="log4j-mail.properties";
try {
InputStream is = MailTest.class.getResourceAsStream(configFile);
InputStream isLog = MailTest.class.getResourceAsStream(logFile);
props.load(is);
logProps.load(isLog);
PropertyConfigurator.configure (logProps);
if(is!=null) is.close();
if(isLog!=null) isLog.close();
}
catch(Exception e) {
System.out.println(e+"file "+configFile+" or "+logFile+" not found");
logger.info(e+"file "+configFile+" or "+logFile+" not found");
}
String displayName=StringUtils.defaultString(props.getProperty("displayName")).trim();
String to=StringUtils.defaultString(props.getProperty("to")).trim();
String cc=StringUtils.defaultString(props.getProperty("cc")).trim();
String from=StringUtils.defaultString(props.getProperty("from")).trim();
String smtpServer=StringUtils.defaultString(props.getProperty("smtpServer")).trim();
String username=StringUtils.defaultString(props.getProperty("username")).trim();
String password=StringUtils.defaultString(props.getProperty("password")).trim();
String subject=StringUtils.defaultString(props.getProperty("subject")).trim();
String content=StringUtils.defaultString(props.getProperty("content")).trim();
String isAuth=StringUtils.defaultString(props.getProperty("isAuth")).trim();
String filePath =StringUtils.defaultString(props.getProperty("filePath")).trim();
String filePrefix =StringUtils.defaultString(props.getProperty("filePrefix")).trim();
String fileExt =StringUtils.defaultString(props.getProperty("fileExt")).trim();
MailUtils mail = new MailUtils();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
Date today = new Date();
String todayStr = dateFormat.format(today);
File path = new File(filePath);
if (!path.isDirectory()) {
System.out.println("filePath "+filePath+"目录错误");
logger.info("filePath "+filePath+"目录错误");
return;
}
else if (path.isDirectory()) {
FilenameFilter filter = new FileFilter(todayStr+filePrefix,fileExt);
File[] files = path.listFiles(filter);
if(files.length==0){
System.out.println("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist");
logger.info("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist");
return;
}
for (int i = 0; i < files.length; i++) {
if (files[i].exists() && files[i].isFile()) {
System.out.println("attachmentpath=" + files[i].getAbsolutePath());
logger.info("attachmentpath=" + files[i].getAbsolutePath());
mail.addAttachfile(files[i]);
}
else{
System.out.println("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist or file");
logger.info("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist or file");
return;
}
}
}
if("true".equalsIgnoreCase(isAuth)){
mail.setAuth(true);
mail.setUserName(username);
mail.setPassword(password);
}
mail.setSmtpServer(smtpServer);
mail.setFrom(from);
mail.setTo(to);
mail.setCc(cc);
mail.setDisplayName(displayName);
mail.setSubject(subject);
mail.setContent(content);
Map map = mail.send();
if("false".equals(map.get("success"))){
System.out.println(map.get("message"));
logger.info(map.get("message"));
}else{
System.out.println("mail send success");
logger.info("mail send success");
}
}
}

log4j代码

log4j.rootLogger=INFO,A1
log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.File=d:/McdReportMail/log/log-McdReport.log
log4j.appender.A1.MaxFileSize=2048KB
log4j.appender.A1.MaxBackupIndex=10
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c][%L][%p] %m%n