JavaMail发送Html邮件内容

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 Test {  
     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验证  
         props.setProperty("mail.smtp.host",smtpHost);//指定SMTP服务器  
         props.put("mail.transport.protocol","smtp");  
         Session mailSession = Session.getDefaultInstance(props);  
         mailSession.setDebug(true);//是否在控制台显示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,"[email?protected]","4542");  
         transport.sendMessage(testMessage,testMessage.getAllRecipients());  
         transport.close();  
   
         System.out.println("Message sent!");  
     }  
   
     public static void main(String[] args) {  
   
         String smtpHost = "smtp.163.com";  
         String from = "[email?protected]";  
         String to = "[email?protected]";  
         String subject = "html邮件测试"; //subject javamail自动转码  
   
         StringBuffer theMessage = new StringBuffer();  
         theMessage.append("<h2><font color=red>这倒霉孩子</font></h2>");  
         theMessage.append("<hr>");  
         theMessage.append("<i>年年失望年年望</i>");  
         try {  
            Test.sendMessage(smtpHost,from,to,subject,theMessage.toString());  
         }  
         catch (javax.mail.MessagingException exc) {  
             exc.printStackTrace();  
         }  
         catch (java.io.UnsupportedEncodingException exc) {  
             exc.printStackTrace();  
         }  
     }  
 }