关于java发送email案例

1.先创建一个Email所用到的信息类：

package com.tan.test;

import java.util.Properties;

/**
* 功能：邮箱信息类
* @author TanZi
* @time 2015-4-20上午10:35:47
*/
public class MailSenderInfo {

//发送邮件的服务器验证需要的信息
private String mailServerHost;  //服务器的IP地址
private String mailServerPort;  //端口号
//发送者的信息
private String formAddress;  //发送者的地址
private String userName;//  发送者的帐号
private String password;//	发送者的pndc
//接收者
private String toAddress;//	接收者的地址
//发送的主题
private String subject;
//发送的内容
private String content;

/**
* 功能：获得邮件会话属性
* @return
*/
public Properties getProperties(){
Properties properties=new Properties();
properties.put("mail.smtp.host", this.mailServerHost);  //主机地址
properties.put("mail.smtp.port", this.mailServerPort);  //端口号
properties.put("mail.smtp.auth", "true");            //设置发送授权认证
return properties;
}

//------------------getter/setter-------------------
public String getMailServerHost() {
return mailServerHost;
}
public void setMailServerHost(String mailServerHost) {
this.mailServerHost = mailServerHost;
}
public String getMailServerPort() {
return mailServerPort;
}
public void setMailServerPort(String mailServerPort) {
this.mailServerPort = mailServerPort;
}
public String getFormAddress() {
return formAddress;
}
public void setFormAddress(String formAddress) {
this.formAddress = formAddress;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getToAddress() {
return toAddress;
}
public void setToAddress(String toAddress) {
this.toAddress = toAddress;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}

}

2.创建继承、重写认证方法

package com.tan.test;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

/**
* 功能：身份验证类——邮箱帐户和密码的验证
* @author TanZi
* @time 2015-4-20上午10:52:17
*/
public class MyAuthenticator extends Authenticator{

String username=null;
String password=null;

public MyAuthenticator(){	}

public MyAuthenticator(String username,String passowrd){
this.username=username;
this.password=passowrd;
}

/**
* 用户名和密码验证
*/
public PasswordAuthentication getPasswordAuthentication(){
return new PasswordAuthentication(username, password);
}
}

3.编写发email发核心类（怎么装载数据。怎么发送）

package com.tan.test;

import java.util.Date;
import java.util.Properties;

import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

/**
* 功能：邮件发送的核心类
* @author TanZi
* @time 2015-4-20上午11:02:26
*/
public class SimleMailSender {

/**
* 功能：邮件发送的核心方法
* @param mailInfo  邮件信息类
* @return boolean
*/
public boolean sendHtmlMail(MailSenderInfo mailInfo){

MyAuthenticator authenticator=new MyAuthenticator(mailInfo.getUserName(),mailInfo.getPassword());//身份验证
Properties properties=mailInfo.getProperties();
//根据邮件会话属性和验证器构造一个发送邮件的session
Session sendMailSession=Session.getDefaultInstance(properties, authenticator);

try {
//定义发送邮件的主体
Message mailMessage=new MimeMessage(sendMailSession);
//创建发送者的地址
Address fromAddress=new InternetAddress(mailInfo.getFormAddress());
//设置邮件消息的发送者
mailMessage.setFrom(fromAddress);
//创建接受者的地址
Address toAddress=new InternetAddress(mailInfo.getToAddress());
//创建邮件消息的接受者
mailMessage.setRecipient(Message.RecipientType.TO, toAddress);//BCC:密送..CC:抄送.. TO:直接发送

//邮件的主题
mailMessage.setSubject(mailInfo.getSubject());
//设置邮件发送的时间
mailMessage.setSentDate(new Date());
//设置邮件消息的主要内容
//	String mailContent=mailInfo.getContent();
//创建一个容器
Multipart maimPart=new MimeMultipart();
//创建一个包含html内容的MimeBodyPart
BodyPart html=new MimeBodyPart();
//设置html的邮件内容
html.setContent(mailInfo.getContent(),"text/html;charset=utf-8");
maimPart.addBodyPart(html);
//创建附件
BodyPart attach=new MimeBodyPart();
DataSource source=new FileDataSource("E:\\Code\\Movie\\images\\four.jpg");//加载要作为附件的文件
attach.setDataHandler(new DataHandler(source));
attach.setFileName("four.jpg");
maimPart.addBodyPart(attach);

//设置内容
mailMessage.setContent(maimPart);
//设置 发送html格式的邮件头信息
MailcapCommandMap mc=(MailcapCommandMap) CommandMap.getDefaultCommandMap();
mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
CommandMap.setDefaultCommandMap(mc);
//发送文件
Transport.send(mailMessage);
return true;
} catch (AddressException e) {

e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

return false;
}
}

4。测试类

package com.tan.test;

/**
* 功能：
* @author TanZi
* @time 2015-4-20下午1:16:15
*/
public class TestMail {

/**
* 功能：
* @param args
*/
public static void main(String[] args) {
MailSenderInfo mailInfo = new MailSenderInfo();
System.out.println("");
mailInfo.setMailServerHost("smtp.qq.com"); // 邮件服务器主机
mailInfo.setMailServerPort("25"); // 服务器端口  SMTP:单单的邮件传输协议  端口：25

mailInfo.setUserName("571868789"); // 发送者用户名
mailInfo.setPassword("tanzi1234"); //　发送者密码
mailInfo.setFormAddress("571868789@qq.com"); //发送者地址

//mailInfo.setToAddress("771822044@qq.com"); // 接收者地址
String toAddress = "987420817@qq.com";
mailInfo.setToAddress(toAddress);

String subject = "TanZi-------text"; // 主题

String  content = "<a  href='http://blog.csdn.net/u011707402' >";
content  += "<div style='width:650px;background-color:#DBDBFF;";
content  += "text-align:center;color:red;font-size:20px;border:0 solid red;'>";
content  +="<b>恭喜你收到我的信息<br />";
content  +="<a href='http://blog.csdn.net/u011707402'>坛子成长记学习知识</a><br />";
content  +="坛子";
content  +="</b><img width='100%' src='http://www.nipic.com/show/7364191.html' /></div></a>";

mailInfo.setSubject(subject);
mailInfo.setContent(content);

SimleMailSender sms = new SimleMailSender();
boolean flag = sms.sendHtmlMail(mailInfo); // 发送邮件
if(flag){
System.out.println("成功！");
}else{
System.out.println("失败！");
}
}

}

5.注意事项

发送邮件错误 454 Authentication failed, please open smtp flag first!

----（方法）在QQ邮箱的设置里面，找到账户-》POP3/IMAP/SMTP选择开启POP3/SMTP服务
535 Authentication failed（原因）：帐号和密码错误