使用javamail發(fā)送html郵件比較復(fù)雜
package org.tatan.mail;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import javax.mail.Session;
import javax.mail.MessagingException;
import javax.mail.Transport;
public class SendHtmlMail {
public static void sendMessage(String smtpHost,
String from, String to,
String subject, String messageText)
throws MessagingException,java.io.UnsupportedEncodingException {
// Step 1: Configure the mail session
System.out.println("Configuring mail session for: " + smtpHost);
java.util.Properties props = new java.util.Properties();
props.setProperty("mail.smtp.auth", "true");//指定是否需要SMTP驗證
props.setProperty("mail.smtp.host", smtpHost);//指定SMTP服務(wù)器
props.put("mail.transport.protocol", "smtp");
Session mailSession = Session.getDefaultInstance(props);
mailSession.setDebug(true);//是否在控制臺顯示debug信息
// Step 2: Construct the message
System.out.println("Constructing message - from=" + from + " to=" + to);
InternetAddress fromAddress = new InternetAddress(from);
InternetAddress toAddress = new InternetAddress(to);
MimeMessage testMessage = new MimeMessage(mailSession);
testMessage.setFrom(fromAddress);
testMessage.addRecipient(javax.mail.Message.RecipientType.TO, toAddress);
testMessage.setSentDate(new java.util.Date());
testMessage.setSubject(MimeUtility.encodeText(subject,"gb2312","B"));
testMessage.setContent(messageText, "text/html;charset=gb2312");
System.out.println("Message constructed");
// Step 3: Now send the message
Transport transport = mailSession.getTransport("smtp");
transport.connect(smtpHost, "webmaster", "password");
transport.sendMessage(testMessage, testMessage.getAllRecipients());
transport.close();
System.out.println("Message sent!");
}
public static void main(String[] args) {
String smtpHost = "localhost";
String from = "webmaster@mymail.com";
String to = "mfc42d@sohu.com";
String subject = "html郵件測試"; //subject javamail自動轉(zhuǎn)碼
StringBuffer theMessage = new StringBuffer();
theMessage.append("<h2><font color=red>這倒霉孩子</font></h2>");
theMessage.append("<hr>");
theMessage.append("<i>年年失望年年望</i>");
try {
SendHtmlMail.sendMessage(smtpHost, from, to, subject, theMessage.toString());
}
catch (javax.mail.MessagingException exc) {
exc.printStackTrace();
}
catch (java.io.UnsupportedEncodingException exc) {
exc.printStackTrace();
}
}
}
郵件頭(參見RFC822，RFC2047)只能包含US-ASCII字符。
郵件頭中任何包含非US-ASCII字符的部分必須進行編碼，使其只包含US-ASCII字符。
但是java mail可以根據(jù)JVM發(fā)送中文郵件自行編碼，，用它自帶的MimeUtility類的encodeText方法對中文信息進行編碼也可以。
郵件正文必須有charset=gb2312否則為
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
打開郵件為亂碼,設(shè)置charset=gb2312后
Content-Type: text/html;charset=gb2312
Content-Transfer-Encoding: quoted-printable
它不能用MimeUtility里的方法來編碼。
郵件正文的編碼方式的信息是要放在Content-Transfer-Encoding這個郵件頭參數(shù)中的，
而MimeUtility里面的方法是將編碼方式的信息放在編碼后的正文內(nèi)容中。
所以如果你對正文也用MimeUtility進行處理，那么其他郵件程序就不會正常顯示你編碼的郵件，
因為其他郵件軟件如outlook,foxmail只會根據(jù)Content-Transfer-Encoding這個里面的信息來對郵件正文進行解碼。