java发送邮件

使用JavaMail发送邮件需要用到mail.jar和activtion.jar两个包。

该类实现了较完整的邮件发送功能，包括以HTML格式发送，添加附件和抄送人。下面是具体的代码：

package cn.cgw.util.mail; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Address; import javax.mail.BodyPart; import javax.mail.Message; import javax.mail.Multipart; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; public class Mail { 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 //smtp认证用户名和密码 private String username; 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 /** * Constructor * @param smtp 邮件发送服务器 */ public Mail(String smtp){ setSmtpHost(smtp); createMimeMessage(); } /** * 设置邮件发送服务器 * @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 } /** * 创建MIME邮件对象 * @return */ 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; } } /** * 设置SMTP是否需要验证 * @param need */ 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"); } } /** * 设置用户名和密码 * @param name * @param pass */ public void setNamePass(String name,String pass) { username = name; password = pass; } /** * 设置邮件主题 * @param mailSubject * @return */ 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; } } /** * 设置邮件正文 * @param mailBody String */ public boolean setBody(String mailBody) { try{ BodyPart bp = new MimeBodyPart(); bp.setContent(""+mailBody,"text/html;charset=GBK"); 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; } } /** * 添加附件 * @param filename 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; } } /** * 设置发信人 * @param from 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; } } /** * 设置收信人 * @param to 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; } } /** * 设置抄送人 * @param copyto 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; } } /** * 发送邮件 */ 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.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.CC)); //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; } } /** * 调用sendOut方法完成邮件发送 * @param smtp * @param from * @param to * @param subject * @param content * @param username * @param password * @return boolean */ public static boolean send(String smtp,String from,String to,String subject,String content,String username,String password) { Mail theMail = new Mail(smtp); theMail.setNeedAuth(true); //需要验证 if(!theMail.setSubject(subject)) return false; if(!theMail.setBody(content)) return false; if(!theMail.setTo(to)) return false; if(!theMail.setFrom(from)) return false; theMail.setNamePass(username,password); if(!theMail.sendOut()) return false; return true; } /** * 调用sendOut方法完成邮件发送,带抄送 * @param smtp * @param from * @param to * @param copyto * @param subject * @param content * @param username * @param password * @return boolean */ public static boolean sendAndCc(String smtp,String from,String to,String copyto,String subject,String content,String username,String password) { Mail theMail = new Mail(smtp); theMail.setNeedAuth(true); //需要验证 if(!theMail.setSubject(subject)) return false; if(!theMail.setBody(content)) return false; if(!theMail.setTo(to)) return false; if(!theMail.setCopyTo(copyto)) return false; if(!theMail.setFrom(from)) return false; theMail.setNamePass(username,password); if(!theMail.sendOut()) return false; return true; } /** * 调用sendOut方法完成邮件发送,带附件 * @param smtp * @param from * @param to * @param subject * @param content * @param username * @param password * @param filename 附件路径 * @return */ public static boolean send(String smtp,String from,String to,String subject,String content,String username,String password,String filename) { Mail theMail = new Mail(smtp); theMail.setNeedAuth(true); //需要验证 if(!theMail.setSubject(subject)) return false; if(!theMail.setBody(content)) return false; if(!theMail.addFileAffix(filename)) return false; if(!theMail.setTo(to)) return false; if(!theMail.setFrom(from)) return false; theMail.setNamePass(username,password); if(!theMail.sendOut()) return false; return true; } /** * 调用sendOut方法完成邮件发送,带附件和抄送 * @param smtp * @param from * @param to * @param copyto * @param subject * @param content * @param username * @param password * @param filename * @return */ public static boolean sendAndCc(String smtp,String from,String to,String copyto,String subject,String content,String username,String password,String filename) { Mail theMail = new Mail(smtp); theMail.setNeedAuth(true); //需要验证 if(!theMail.setSubject(subject)) return false; if(!theMail.setBody(content)) return false; if(!theMail.addFileAffix(filename)) return false; if(!theMail.setTo(to)) return false; if(!theMail.setCopyTo(copyto)) return false; if(!theMail.setFrom(from)) return false; theMail.setNamePass(username,password); if(!theMail.sendOut()) return false; return true; } }