javamail实现gmail收发邮件
import java.io.UnsupportedEncodingException;
import java.security.Security;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Part;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Transport;
import javax.mail.URLName;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
/*By 黄金@buaa 2009/06/08
* 转载请注明作者，谢谢！
*/
public class Email {
private Session session;
private String username;
private String password;
private String host;
private String text;
public void gmailSend(String to,String subject,String message) throws AddressException, MessagingException {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
// Get a Properties object
Properties props = System.getProperties();
props.setProperty("mail.smtp.host", "smtp.gmail.com");
props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
props.setProperty("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props,
new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(getUsername(), getPassword());
}
});
// -- Create a new message --
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(getUsername()));
// Set the to address
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
msg.setSubject(subject);
msg.setText(message);
// msg.setSentDate(new Date());
msg.saveChanges();
Transport.send(msg);
System.out.println("Message sent.");
}
public String gmailFetch(int sum, String username, String password) {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
// Get a Properties object
Properties props = System.getProperties();
props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);
props.setProperty("mail.pop3.socketFactory.fallback", "false");
props.setProperty("mail.pop3.port", "995");
props.setProperty("mail.pop3.socketFactory.port", "995");
Session session = Session.getInstance(props, null);
URLName urln = new URLName("pop3", "pop.gmail.com", 995, null,
username, password);
Store store;
try {
store = session.getStore(urln);
} catch (NoSuchProviderException e) {
// TODO Auto-generated catch block
e.printStackTrace();
String result = "{/"type/":/"error/",/"body/":{/"reason/":/"" + e
+ "/"}}";
return result;
}
Folder inbox = null;
try {
store.connect();
inbox = store.getFolder("INBOX");
inbox.open(Folder.READ_ONLY);
// FetchProfile profile = new FetchProfile();
// profile.add(FetchProfile.Item.ENVELOPE);
Message[] messages = inbox.getMessages();
// inbox.fetch(messages, profile);
System.out.println("收件箱的邮件数：" + messages.length);
String result = "";
result += "{/"type/":/"api/",/"body/":{/"emails/":[";
for (int i = messages.length - 1; i >= messages.length - sum
&& i >= 0; i--) {
// 邮件发送者
String from;
try {
from = decodeText(messages[i].getFrom()[0].toString());
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
result = "{/"type/":/"error/",/"body/":{/"reason/":/"" + e
+ "/"}}";
return result;
}
InternetAddress ia = new InternetAddress(from);
System.out.println("FROM:" + ia.getPersonal() + '('
+ ia.getAddress() + ')');
// 邮件标题
System.out.println("TITLE:" + messages[i].getSubject());
// 邮件大小
//System.out.println("SIZE:" + messages[i].getSize());
// 邮件发送时间
System.out.println("DATE:" + messages[i].getSentDate());
System.out.println("CONTENT:");
text = "";
try {
getMailContent(messages[i]);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
result = "{/"type/":/"error/",/"body/":{/"reason/":/"" + e
+ "/"}}";
return result;
}
result += "{/"subject/":/"" + messages[i].getSubject() + "/"";
result += ",/"size/":/"" + messages[i].getSize() + "/"";
result += ",/"date/":/"" + messages[i].getSentDate() + "/"";
result += ",/"content/":/"" + text + "/"}";
if (i == 0 || i == messages.length - sum) {
result += "]}}";
} else {
result += ",";
}
}
return result;
} catch (MessagingException e1) {
// TODO Auto-generated catch block
String result = "{/"type/":/"error/",/"body/":{/"reason/":/"" + e1
+ "/"}}";
return result;
}
}
public void getMailContent(Part part) throws Exception {
StringBuffer bodytext = new StringBuffer();
String contenttype = part.getContentType();
int nameindex = contenttype.indexOf("name");
boolean conname = false;
if (nameindex != -1)
conname = true;
//System.out.println("CONTENTTYPE: " + contenttype);
if (part.isMimeType("text/plain") && !conname) {
bodytext.append((String) part.getContent());
//bodytext.append(new String(((String) part.getContent())
// .getBytes("ISO-8859-1"), "utf-8"));
System.out.println(bodytext.toString());
text += bodytext.toString();
} else if (part.isMimeType("text/html") && !conname) {
bodytext.append((String) part.getContent());
System.out.println(bodytext.toString());
text += bodytext.toString();
} else if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent();
int counts = multipart.getCount();
for (int i = 0; i < counts; i++) {
getMailContent(multipart.getBodyPart(i));
}
} else if (part.isMimeType("message/rfc822")) {
getMailContent((Part) part.getContent());
} else {
}
}
public void login(String host,String username,String password) {
if (host.equals("") || username.equals("") || password.equals("")) {
String result = "{/"type/":/"error/",/"body/":{/"reason/":/"参数host、username、password都不能为空！/"}}";
System.out.println(result);
return;
}
setHost(host);
setUsername(username);
setPassword(password);
}
protected static String decodeText(String text)
throws UnsupportedEncodingException {
if (text == null)
return null;
if (text.startsWith("=?GB") || text.startsWith("=?gb"))
text = MimeUtility.decodeText(text);
else
text = new String(text.getBytes("ISO8859_1"));
return text;
}
public void setUsername(String username) {
this.username = username;
}
public String getUsername() {
return username;
}
public void setHost(String host) {
this.host = host;
}
public String getHost() {
return host;
}
public void setText(String text) {
this.text = text;
}
public String getText() {
return text;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public void setSession(Session session) {
this.session = session;
}
public Session getSession() {
return session;
}
public static void main(String[] args){
Email email = new Email();
email.login("smtp.gmail.com", "**********@gmail.com", "********");
try {
email.gmailSend("********@hotmail.com","subject","Hi!Have fun!I'm testing!");
} catch (AddressException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
email.gmailFetch(1,"**********@gmail.com", "********");//第一个参数为显示邮件的个数
}
}
class MyAuthenticator extends javax.mail.Authenticator {
private String strUser;
private String strPwd;
public MyAuthenticator(String user, String password) {
this.strUser = user;
this.strPwd = password;
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(strUser, strPwd);
}
}