java 发送邮件的实例代码(可移植)

以一个web项目为例，代码是可以移植的

首先要导入mail.jar包，然后创建自己的类

1：htmlsender类

package com.txq.mail;

 import java.util.properties;

 import javax.mail.message;
 import javax.mail.messagingexception;
 import javax.mail.nosuchproviderexception;
 import javax.mail.session;
 import javax.mail.transport;
 import javax.mail.internet.addressexception;
 import javax.mail.internet.internetaddress;
 import javax.mail.internet.mimemessage;
 import javax.mail.internet.mimemultipart;
 import javax.mail.internet.mimeutility;

 /**
  *
  * @author administrator
  *
  */
 public class htmlsender {
     private mimemessage message;
     private properties props;
     private session session;
     private string name = "";
     private string password = "";

     public htmlsender(string host,string name,string password)
     {
         this.name = name;
         this.password = password;
         props = system.getproperties();

         props.put("mail.smtp.host", host);
         props.put("mail.smtp.auth","true");
         myauthenticator auth = new myauthenticator(name,password);
         session = session.getdefaultinstance(props,auth);

         message = new mimemessage(session);
         new mimemultipart();
     }

     public void setfrom(string from)
     {
         try
         {
             message.setfrom(new internetaddress(from));
         }
         catch (addressexception e)
         {
             e.printstacktrace();
         }
         catch (messagingexception e)
         {
             e.printstacktrace();
         }
     }

     public void setto(string to)
     {
         try
         {
             message.setrecipients(message.recipienttype.to,internetaddress.parse(to));
         }
         catch(addressexception e)
         {
             e.printstacktrace();
         }
         catch(messagingexception e)
         {
             e.printstacktrace();
         }
     }

     public void setsubject(string subject)
     {
         try
         {
             message.setsubject(subject);
         }
         catch(exception e)
         {
             e.printstacktrace();
         }
     }

     public void setcontect(string content)
     {
         try
         {
             message.setcontent(content,"text/html;charset=utf-8");
         }
         catch(exception e)
         {
             e.printstacktrace();
         }
     }

     public boolean send()
     {
         try
         {
             transport transport = session.gettransport("smtp");
             transport.connect((string)props.get("mail.smtp.host"),name,password);
             transport.sendmessage(message, message.getrecipients(message.recipienttype.to));
             transport.close();
             return true;
         }
         catch(nosuchproviderexception e)
         {
             e.printstacktrace();
             return false;
         }
         catch(messagingexception e)
         {
             e.printstacktrace();
             return false;
         }
     }
 }

2：myauthenticator类

package com.txq.mail;

 import javax.mail.authenticator;
 import javax.mail.passwordauthentication;

 
 public class myauthenticator extends authenticator{
     string name;
     string password;
     public myauthenticator(string name,string pasword)
     {
         this.name = name;
         this.password = pasword;
         getpasswordauthentication();
     }
     protected passwordauthentication getpasswordauthentication()
     {
         return new passwordauthentication(name,password);
     }
 }

3：mailaction类

package com.txq.action;

 import java.io.printwriter;

 import com.opensymphony.xwork2.actionsupport;
 import com.txq.mail.htmlsender;

 public class mailaction extends actionsupport {
     private string email;
     public string sendemail(){
         //代理主机-新浪
         string host = "smtp.sina.cn";
         //帐号-新浪帐号
         string name = "followmusic";
         //密码-新浪密码
         string password = "followmusic";
         //创建发送邮件对象
         htmlsender mail = new htmlsender(host,name,password);
         //发邮帐号
         mail.setfrom("[e-mail]");
         //收邮帐号
         mail.setto("[e-mail]");
         //邮件主题
         mail.setsubject("淘兴趣");
         //邮件内容
         mail.setcontect("你的好友邀请你来淘兴趣~");

         if(mail.send())
         {
             return success;
         }
         else
         {
             return "error";
         }
     }
     public string getemail() {
         return email;
     }
     public void setemail(string email) {
         this.email = email;
     }
 }