JavaMail

HtmlEmail.java

package com.kaishengit.test;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.HtmlEmail;

public class Test {
	/**
	 * 在lib里导入jar包commons-email-1.2.jar和mail.jar
	 * @throws IOException 
	 * 
	 */
	public static void main(String[] args) throws IOException {
		//发送HTML邮件,在配置文件中建一个mailTemplate.txt配置文件（里面是一个html），然后读取，再替换里面需要替换的内容
		
		//字节流
		InputStream inStream = Test.class.getClassLoader().getResourceAsStream("mailTemplate.txt");
		
		//字符流
		InputStreamReader reader = new InputStreamReader(inStream);
		
		char[] buffer = new char[512];
		int len = -1;
		StringBuffer sb = new StringBuffer();
		while((len = reader.read(buffer)) != -1) {
			sb.append(new String(buffer, 0, len));
		}
		
		reader.close();
		
		String html = sb.toString();
		
		html = html.replace("{name}", "rose").replace("{link}", "http://www.kaishengit.com");
		
		HtmlEmail mail = new HtmlEmail();
		mail.setHostName("smtp.qq.com");
		mail.setAuthentication("994608455", "*******");
		mail.setCharset("UTF-8");
		mail.setTLS(true);
		
		try {
			mail.setFrom("[email protected]");
			mail.setSubject("注册信息激活");
			mail.setMsg(html);
			mail.addTo("[email protected]");
			
			mail.send();
		} catch (EmailException e) {
			e.printStackTrace();
		}
	}
}

MultiPartEmail.java

import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailAttachment;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.MultiPartEmail;


public class Test {
	/**
	 * 在lib里导入jar包commons-email-1.2.jar和mail.jar
	 * 
	 */
	public static void main(String[] args) {
		//发送带附件的邮件

		EmailAttachment ea = new EmailAttachment();
		ea.setPath("F:\\1.jpg");
		
		MultiPartEmail mail = new MultiPartEmail();
		mail.setHostName("smtp.qq.com");
		mail.setAuthentication("994608455", "123456");
		mail.setCharset("UTF-8");
		mail.setTLS(true);
		
		try {
			mail.setFrom("[email protected]");
			mail.setSubject("注册信息激活");
			mail.setMsg("这是用commons email 发送的邮件");
			mail.addTo("[email protected]");
			
			mail.attach(ea);
			mail.send();
		} catch (EmailException e) {
			e.printStackTrace();
		}
	}
}

possible exception

Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
	at javax.mail.internet.MimeUtility.<clinit>(MimeUtility.java:1161)
	at javax.mail.internet.InternetAddress.setPersonal(InternetAddress.java:196)
	at org.apache.commons.mail.Email.createInternetAddress(Email.java:596)
	at org.apache.commons.mail.Email.setFrom(Email.java:668)
	at org.apache.commons.mail.Email.setFrom(Email.java:651)
	at org.apache.commons.mail.Email.setFrom(Email.java:631)
	at com.kaishengit.test.Test.main(Test.java:18)
Solution(解决办法)：
   1.在磁盘上找到javaee.jar(其路径可以在Java EE 5 Libraries下有显示，我的在C:\Program Files\MyEclipse\Common\plugins\com.genuitec.eclipse.j2eedt.core_10.0.0.me201110301321\data\libraryset\EE_5 )
   2.用winrar打卡
   3.删除javax目录中的mail文件夹


org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.qq.com:25
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242)
	at org.apache.commons.mail.Email.send(Email.java:1267)
	at com.kaishengit.test.Test.main(Test.java:24)
Caused by: javax.mail.AuthenticationFailedException: 454 Authentication failed, please open smtp flag first!

	at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:809)
	at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:752)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:669)
	at javax.mail.Service.connect(Service.java:317)
	at javax.mail.Service.connect(Service.java:176)
	at javax.mail.Service.connect(Service.java:125)
	at javax.mail.Transport.send0(Transport.java:194)
	at javax.mail.Transport.send(Transport.java:124)
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)
	... 2 more
Solution(解决办法):
  邮箱的SMTP服务未开启，需要开启邮箱的SMTP服务

SimpleEmail.java

import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;

public class Test {
	/**
	 * 在lib里导入jar包commons-email-1.2.jar和mail.jar
	 * 
	 */
	public static void main(String[] args) {
		//发送普通文本邮件

		Email mail = new SimpleEmail();
		mail.setHostName("smtp.qq.com");
		mail.setAuthentication("994608455", "123456");
		mail.setCharset("UTF-8");
		mail.setTLS(true);
		
		try {
			mail.setFrom("[email protected]");
			mail.setSubject("注册信息激活");
			mail.setMsg("这是用commons email 发送的邮件");
			mail.addTo("[email protected]");
			mail.send();
		} catch (EmailException e) {
			e.printStackTrace();
		}
	}
}