Java邮件开发(4)_邮件开发中问题汇总

本文包含四部分，一、直接发送一封现有的邮件文件 二、在Web应用中增加邮件发送功能 三、使用JavaMail进行邮件开发的一些技巧 四、编码过程中遇到的异常及解决

一、直接发送一封现有的邮件文件

要求：直接发送系列3中生成的demo3.eml.

 

代码如下：

 

package info.zoio.javamail;

import java.io.FileInputStream;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.MimeMessage;

public class Demo4 {
	public static void main(String[] args) {
		Properties props = new Properties();
		props.setProperty("mail.smtp.auth", "true");
		props.setProperty("mail.transport.protocol", "smtp");
		props.setProperty("mail.host", "smtp.126.com");
		//props.setProperty("mail.port", "25");
		
		Session session = Session.getInstance(props,
				new Authenticator() {	//策略模式
					protected PasswordAuthentication getPasswordAuthentication(){
						return new PasswordAuthentication("java_mail_test", "h123456");
					}
				});
		session.setDebug(true);
		
		try {
			/*
			Message msg = new MimeMessage(session);
			msg.setFrom(new InternetAddress("[email protected]"));
			msg.setSubject("JavaMail API");
			msg.setRecipients(Message.RecipientType.TO, 
					InternetAddress.parse("[email protected],[email protected]"));
			msg.setContent("<span style='color:red'>JavaMail开发测试</span>","text/html;charset=GBK");
			
			Transport.send(msg);*/
			
			Message msg = new MimeMessage(session, new FileInputStream("F:\\Java邮件\\demo3.eml"));
			Transport.send(msg);
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

 

二、在Web应用中增加邮件发送功能（源码见附件）

新建Web工程JavaMailWeb.

1.普通方式

直接使用SendMailServlet调用Demo4类的main方法.

 

说明：部署到tomcat时需要添加mail.jar和activation.jar

 

2.用tomcat支持的JNDI资源方式

步骤：

        a.配置JNDI资源；

        b.将mail.jar拷贝到<tomcat_home>/common/lib目录下（jdk1.6以下版本需要添加activation.jar）

        c.在java程序中使用JNDI API获取mail的session对象

 

 

a.根据tomcat帮助文档，在WebRoot/META-INF文件夹下创建context.xml

添加如下内容

<Context>

        <!-- JNDI -->

        <Resource name="mail/Session" auth="Container"

                type="javax.mail.Session"

                mail.smtp.host="smtp.126.com"

                mail.smtp.suth="true"

                mail.transport.protocol="smtp"/>

</Context>

 

 

b.重写SendMailServlet.java

                        Context initCtx = new InitialContext();

                        Context envCtx = (Context) initCtx.lookup("java:comp/env");

                        Session session = (Session) envCtx.lookup("mail/Session");

 

                        Message msg = new MimeMessage(session);

                        msg.setFrom(new InternetAddress("[email protected]"));

                        msg.setRecipient(RecipientType.TO, new InternetAddress("[email protected]"));

                        msg.setSubject("Tomcat JNDI Test");

                        msg.setText("The email which caotains JNDI test is sent by humyna");

 

                        Transport transport = session.getTransport();

                        transport.connect("smtp.126.com",25,"java_mail_test", "h123456");

                        transport.sendMessage(msg,InternetAddress.parse("[email protected]"));

                        transport.close();

 

c.将mail.jar和activation.jar拷贝到<tomcat_home>/common/lib目录下。（并删除掉WebRoot/WEB-INF/lib下的两个jar包）

 

 

三、使用JavaMail进行邮件开发的一些技巧

1.解决附件中中文显示的问题，使用工具类进行编码

attch1.setFileName(MimeUtility.encodeText("attach1哈哈.txt"));

 

2.如何在程序中设置默认回信地址

msg.setReplyTo(new Address[]{new InternetAddress("[email protected]")});

 

3.关于收件邮箱油耗显示收发件人的名称

 

msg.setFrom(new InternetAddress(" \" " + MimeUtility.encodeText("十井") + " \" <[email protected]>"));

4.JDK1.6以下需要添加activation.jar

 

 

四、编码过程中遇到的异常及解决

 

1.错误一

 

Exception in thread "main" javax.mail.internet.ParseException: Expected ';', got "/"
        at javax.mail.internet.ParameterList.<init>(ParameterList.java:289)
        at javax.mail.internet.ContentType.<init>(ContentType.java:114)
        at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1331)
        at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2107)
        at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2075)
        at info.zoio.javamail.Demo3.main(Demo3.java:77)

 解决：MimeMultipart msgMultipart = new MimeMultipart("multipart/mixed");

        改为：MimeMultipart msgMultipart = new MimeMultipart("mixed");

 原因：可查看MimeMultipart的构造函数，说的是subtype

 

2.错误二（tomcat支持的JNDI资源方式）

 

java.lang.ClassCastException: javax.mail.Session
        at info.zoio.web.mail.servlets.SendMailServlet.doPost(SendMailServlet.java:54)
        at info.zoio.web.mail.servlets.SendMailServlet.doGet(SendMailServlet.java:33)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
        at java.lang.Thread.run(Unknown Source)

 

 

原因：由于内容中加载了两份mail.jar和activation.jar

解决：需要将web工程lib下的相关包删除

 

 

3.错误三

 

com.sun.mail.smtp.SMTPSendFailedException: 553 authentication is required,smtp4,jdKowED5aUm4YExQXrqGAw--.795S2 1347182776
;
  nested exception is:
        com.sun.mail.smtp.SMTPSenderFailedException: 553 authentication is required,smtp4,jdKowED5aUm4YExQXrqGAw--.795S2 1347182776

        at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2114)
        at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1618)
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1119)
        at javax.mail.Transport.send0(Transport.java:195)
        at javax.mail.Transport.send(Transport.java:124)
        at info.zoio.web.mail.servlets.SendMailServlet.doPost(SendMailServlet.java:64)
        at info.zoio.web.mail.servlets.SendMailServlet.doGet(SendMailServlet.java:33)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:843)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:679)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1293)
        at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.mail.smtp.SMTPSenderFailedException: 553 authentication is required,smtp4,jdKowED5aUm4YExQXrqGAw--.795S2 1347182776

        at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1625)
        ... 19 more

 

网上说的原因是：

 

1)发件服务器地址与邮件的发件人地址不同

2)发件时使用的登陆发件服务器的用户名和发件人不同，比如你填的发件人是[email protected]，你却用其它的用户名比如aaachii登陆发件服务器，无论你是否知道aaachii这个账号的密码都会返回上书的验证错误 

3)最简单的情况：你把发件用的密码弄错了

 

 

我的解决方法是（按照上面的方法测试了没什么了帮助）：

transport.send(msg,InternetAddress.parse("[email protected]"));改成

transport.sendMessage(msg,InternetAddress.parse("[email protected]"));

 

 

（JavaMail实践完）

 

下一步：实现安卓平台邮件收发功能（计划支持gmail\126\163）。