发送mail

package org.apache.android.mail; 
 
import javax.activation.DataHandler; 
import javax.activation.DataSource; 
import javax.mail.Message; 
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 
import java.io.ByteArrayInputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
import java.security.Security; 
import java.util.Properties; 
 
public class GMailSender extends javax.mail.Authenticator { 
    private String mailhost = "smtp.gmail.com"; 
    private String user; 
    private String password; 
    private Session session; 
 
    static { 
        Security.addProvider(new org.apache.harmony.xnet.provider.jsse.JSSEProvider()); 
    } 
 
    public GMailSender(String user, String password) { 
        this.user = user; 
        this.password = password; 
 
        Properties props = new Properties(); 
        props.setProperty("mail.transport.protocol", "smtp"); 
        props.setProperty("mail.host", mailhost); 
        props.put("mail.smtp.auth", "true"); 
        props.put("mail.smtp.port", "465"); 
        props.put("mail.smtp.socketFactory.port", "465"); 
        props.put("mail.smtp.socketFactory.class", 
                "javax.net.ssl.SSLSocketFactory"); 
        props.put("mail.smtp.socketFactory.fallback", "false"); 
        props.setProperty("mail.smtp.quitwait", "false"); 
 
        session = Session.getDefaultInstance(props, this); 
    } 
 
    protected PasswordAuthentication getPasswordAuthentication() { 
        return new PasswordAuthentication(user, password); 
    } 
 
    public synchronized void sendMail(String subject, String body,
        String sender, String recipients) throws Exception { 
        MimeMessage message = new MimeMessage(session); 
        DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain")); 
        message.setSender(new InternetAddress(sender)); 
        message.setSubject(subject); 
        message.setDataHandler(handler); 
        if (recipients.indexOf(',') > 0) 
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients)); 
        else 
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients)); 
        Transport.send(message); 
    } 
 
    public class ByteArrayDataSource implements DataSource { 
        private byte[] data; 
        private String type; 
 
        public ByteArrayDataSource(byte[] data, String type) { 
            super(); 
            this.data = data; 
            this.type = type; 
        } 
 
        public ByteArrayDataSource(byte[] data) { 
            super(); 
            this.data = data; 
        } 
 
        public void setType(String type) { 
            this.type = type; 
        } 
 
        public String getContentType() { 
            if (type == null) 
                return "application/octet-stream"; 
            else 
                return type; 
        } 
 
        public InputStream getInputStream() throws IOException { 
            return new ByteArrayInputStream(data); 
        } 
 
        public String getName() { 
            return "ByteArrayDataSource"; 
        } 
 
        public OutputStream getOutputStream() throws IOException { 
            throw new IOException("Not Supported"); 
        } 
    } 
}