java实现发送邮件

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Date;
import javax.activation.*;
import java.io.*;
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
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
public Mail(String smtp) {
setSmtpHost(smtp);
createMimeMessage();
}
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
}
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(); // mp 一个multipart对象
// Multipart is a container that holds multiple body parts.
return true;
} catch (Exception e) {
System.err.println("创建MIME邮件对象失败！" + e);
return false;
}
}
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");
}
}
public void setNamePass(String name, String pass) {
System.out.println("程序得到用户名与密码");
username = name;
password = pass;
}
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;
}
}
public boolean setBody(String mailBody) {
try {
System.out.println("设置邮件体格式");
BodyPart bp = new MimeBodyPart();
// 转换成中文格式
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;
}
}
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;
}
}
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;
}
}
public boolean setTo(String to) {
System.out.println("设置收信人");
if (to == null)
return false;
try {
mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress
.parse(to));
return true;
} catch (Exception e) {
return false;
}
}
public boolean setCopyTo(String copyto) {
System.out.println("发送附件到");
if (copyto == null)
return false;
try {
mimeMsg.setRecipients(Message.RecipientType.CC,
(Address[]) InternetAddress.parse(copyto));
return true;
} catch (Exception e) {
return false;
}
}
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;
}
}
public static void main(String[] args) {
String mailbody = "发送邮件测试 <font color=red>欢迎你,java</font>";
Mail themail = new Mail("smtp.sina.com");
themail.setNeedAuth(true);
// 标题
if (themail.setSubject("发送邮件测试") == false)
return;
// 邮件内容 支持html 如 <font color=red>欢迎你,java</font>
if (themail.setBody(mailbody) == false)
return;
// 收件人邮箱
if (themail.setTo("########@sina.com") == false)
return;
// 发件人邮箱
if (themail.setFrom("########@sina.com") == false)
return;
// 设置附件
if (themail.addFileAffix("mail.txt") == false)
return; // 附件在本地机子上的绝对路径
themail.setNamePass("用户名", "密码"); // 用户名与密码,即您选择一个自己的电邮
if (themail.sendout() == false)
return;
}
}