用javamail发送邮件
/* 在java版经常看到有人问如何用javamail发送邮件?如何接收邮件?如何访问多个文件夹等。问题零散,而历史的回复早已经淹没在问题的海洋之中。
本人之前所做过一个java项目,其中包含有WebMail功能,当初为用java实现而对javamail摸索了一段时间,总算有点收获。看到论坛中的经常有此方面的问题,因此把我的一些经验帖出来,希望对大家有些帮助。
此篇仅介绍用javamail实现发送邮件功能,其中涉及smtp认证,邮件附件发送,及HTML内容邮件等。 其它有关多邮箱的实现,接收POP3邮件及IMAP等内容,将在后续文章中介绍。
如下程序需要:javamail,JAF包,j2ee.jar包含了上述两个包,建议大家安装J2SDKEE或直接拷贝j2ee.jar,将其添加到jbuilder的library中,或系统ClassPath中
*/
package com.me.util.mail;
/** * @author Zhangkun aistill@msn.com * @version 1.0 */
import java.util.*; import javax.mail.*; import javax.mail.internet.*; import java.util.Date; import javax.activation.*; import java.io.*; import com.me.util.*;
public class sendMail {
private MimeMessage mimeMsg; //MIME邮件对象
private Session session; //邮件会话对象 private Properties props; //系统属性 private boolean needAuth = false; //smtp是否需要认证
private String username = ""; //smtp认证用户名和密码 private String password = "";
private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象
/** * */ public sendMail() { setSmtpHost(getConfig.mailHost);//如果没有指定邮件服务器,就从getConfig类中获取 createMimeMessage(); }
public sendMail(String smtp){ setSmtpHost(smtp); createMimeMessage(); }
/** * @param hostName String */ public void setSmtpHost(String hostName) { System.out.println("设置系统属性:mail.smtp.host = "+hostName); if(props == null)props = System.getProperties(); //获得系统属性对象
props.put("mail.smtp.host",hostName); //设置SMTP主机 }
/** * @return boolean */ public boolean createMimeMessage() { try{ System.out.println("准备获取邮件会话对象!"); session = Session.getDefaultInstance(props,null); //获得邮件会话对象 } catch(Exception e){ System.err.println("获取邮件会话对象时发生错误!"+e); return false; }
System.out.println("准备创建MIME邮件对象!"); try{ mimeMsg = new MimeMessage(session); //创建MIME邮件对象 mp = new MimeMultipart();
return true; } catch(Exception e){ System.err.println("创建MIME邮件对象失败!"+e); return false; } }
/** * @param need boolean */ public void setNeedAuth(boolean need) { System.out.println("设置smtp身份认证:mail.smtp.auth = "+need); if(props == null)props = System.getProperties();
if(need){ props.put("mail.smtp.auth","true"); }else{ props.put("mail.smtp.auth","false"); } }
/** * @param name String * @param pass String */ public void setNamePass(String name,String pass) { username = name; password = pass; }
/** * @param mailSubject String * @return boolean */ public boolean setSubject(String mailSubject) { System.out.println("设置邮件主题!"); try{ mimeMsg.setSubject(mailSubject); return true; } catch(Exception e) { System.err.println("设置邮件主题发生错误!"); return false; } }
/** * @param mailBody String */ public boolean setBody(String mailBody) { try{ BodyPart bp = new MimeBodyPart(); bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=gb2312>"+mailBody,"text/html;charset=GB2312"); mp.addBodyPart(bp);
return true; } catch(Exception e){ System.err.println("设置邮件正文时发生错误!"+e); return false; } }
/** * @param name String * @param pass String */ public boolean addFileAffix(String filename) {
System.out.println("增加邮件附件:"+filename);
try{ BodyPart bp = new MimeBodyPart(); FileDataSource fileds = new FileDataSource(filename); bp.setDataHandler(new DataHandler(fileds)); bp.setFileName(fileds.getName());
mp.addBodyPart(bp);
return true; } catch(Exception e){ System.err.println("增加邮件附件:"+filename+"发生错误!"+e); return false; } }
/** * @param name String * @param pass String */ public boolean setFrom(String from) { System.out.println("设置发信人!"); try{ mimeMsg.setFrom(new InternetAddress(from)); //设置发信人 return true; } catch(Exception e) { return false; } }
/** * @param name String * @param pass String */ public boolean setTo(String to){ if(to == null)return false;
try{ mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to)); return true; } catch(Exception e) { return false; }
}
/** * @param name String * @param pass String */ public boolean setCopyTo(String copyto) { if(copyto == null)return false; try{ mimeMsg.setRecipients(Message.RecipientType.CC,(Address[])InternetAddress.parse(copyto)); return true; } catch(Exception e) { return false; } }
/** * @param name String * @param pass String */ public boolean sendout() { try{ mimeMsg.setContent(mp); mimeMsg.saveChanges(); System.out.println("正在发送邮件....");
Session mailSession = Session.getInstance(props,null); Transport transport = mailSession.getTransport("smtp"); transport.connect((String)props.get("mail.smtp.host"),username,password); transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO)); //transport.send(mimeMsg);
System.out.println("发送邮件成功!"); transport.close();
return true; } catch(Exception e) { System.err.println("邮件发送失败!"+e); return false; } }
/** * Just do it as this */ public static void main(String[] args) {
String mailbody = "<meta http-equiv=Content-Type content=text/html; charset=gb2312>"+ "<div align=center><a href=http://www.csdn.net> csdn </a></div>";
sendMail themail = new sendMail("smtp.msn.com"); themail.setNeedAuth(true);
if(themail.setSubject("标题") == false) return; if(themail.setBody(mailbody) == false) return; if(themail.setTo("gates@msn.com") == false) return; if(themail.setFrom("bill@msn.com") == false) return; if(themail.addFileAffix("c:\\boot.ini") == false) return; themail.setNamePass("user","password");
if(themail.sendout() == false) return; } }
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