解决JavaMail发邮件抛出找不到SharedByteArrayInputStream类的异常

在最近项目开发过程中,需要用到JavaMail发邮件。在Java Project下导入官方包mail.jar(截止今天的最新版是1.4.4,下载地址是:http://www.oracle.com/technetwork/java /javamail/index-138643.html),另外需要导入activation-1.1.jar,执行下面的代码,可成功发送邮件。

下面这段代码是网上找的,大家可以参考一下。

代码出处:http://blogold.chinaunix.net/u/15221/showart_1078351.html

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

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

/**
 * 利用java.mail的邮件发送程序
 */

public class SendMailTest {
    public static void main(String[] args) {
        String title = "SendMailTest_title";// 所发送邮件的标题
        String from = "[email protected]";// 从那里发送
        String sendTo[] = { "[email protected]", "[email protected]" };// 发送到那里
        // 邮件的文本内容,可以包含html标记则显示为html页面
        String content = "mail test!!!!!!<br><a href=#>aaa</a>";
        // 所包含的附件,及附件的重新命名
        String fileNames[] = { "F:\\text1.txt,text1.txt",
                "F:\\text2.txt,text2.txt" };
        try {
            sendmail(title, from, sendTo, content, fileNames,
                    "text/html;charset=gb2312");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    @SuppressWarnings("static-access")
    public static void sendmail(String subject, String from, String[] to,
            String text, String[] filenames, String mimeType) throws Exception {
        // 可以从配置文件读取相应的参数
        Properties props = new Properties();

        String smtp = "smtp.163.com"; // 设置发送邮件所用到的smtp
        String servername = "XXXXX";
        String serverpaswd = "******";

        javax.mail.Session mailSession; // 邮件会话对象
        javax.mail.internet.MimeMessage mimeMsg; // MIME邮件对象

        props = java.lang.System.getProperties(); // 获得系统属性对象
        props.put("mail.smtp.host", smtp); // 设置SMTP主机
        props.put("mail.smtp.auth", "true"); // 是否到服务器用户名和密码验证
        // 到服务器验证发送的用户名和密码是否正确
        Email_Autherticatorbean myEmailAuther = new Email_Autherticatorbean(
                servername, serverpaswd);
        // 设置邮件会话
        mailSession = javax.mail.Session.getInstance(props,
                (Authenticator) myEmailAuther);
        // 设置传输协议
        javax.mail.Transport transport = mailSession.getTransport("smtp");
        // 设置from、to等信息
        mimeMsg = new javax.mail.internet.MimeMessage(mailSession);
        if (from != null && !from.equals("")) {
            InternetAddress sentFrom = new InternetAddress(from);
            mimeMsg.setFrom(sentFrom); // 设置发送人地址
        }

        // 收件人
        InternetAddress[] sendTo = new InternetAddress[to.length];
        for (int i = 0; i < to.length; i++) {
            System.out.println("发送到:" + to[i]);
            sendTo[i] = new InternetAddress(to[i]);
        }

        // 抄送
        InternetAddress[] sendToCC = new InternetAddress[2];
        sendToCC[0] = new InternetAddress("[email protected]");
        sendToCC[1] = new InternetAddress("[email protected]");

        // 密送
        InternetAddress[] sendToBCC = new InternetAddress[2];
        sendToBCC[0] = new InternetAddress("[email protected]");
        sendToBCC[1] = new InternetAddress("[email protected]");

        mimeMsg.setRecipients(javax.mail.internet.MimeMessage.RecipientType.TO,
                sendTo);
        mimeMsg.setRecipients(javax.mail.internet.MimeMessage.RecipientType.CC,
                sendToCC);
        mimeMsg.setRecipients(
                javax.mail.internet.MimeMessage.RecipientType.BCC, sendToBCC);

        mimeMsg.setSubject(subject, "gb2312");

        MimeBodyPart messageBodyPart1 = new MimeBodyPart();
        messageBodyPart1.setContent(text, mimeType);

        Multipart multipart = new MimeMultipart();// 附件传输格式
        multipart.addBodyPart(messageBodyPart1);

        for (int i = 0; i < filenames.length; i++) {
            MimeBodyPart messageBodyPart2 = new MimeBodyPart();
            // 选择出每一个附件名
            String filename = filenames[i].split(",")[0];
            System.out.println("附件名:" + filename);
            String displayname = filenames[i].split(",")[1];
            // 得到数据源
            FileDataSource fds = new FileDataSource(filename);
            // 得到附件本身并设置到BodyPart
            messageBodyPart2.setDataHandler(new DataHandler(fds));
            // 得到文件名同样设置到BodyPart
            messageBodyPart2.setFileName(MimeUtility.encodeText(displayname));
            multipart.addBodyPart(messageBodyPart2);
        }
        mimeMsg.setContent(multipart);
        // 设置信件头的发送日期
        mimeMsg.setSentDate(new Date());
        mimeMsg.saveChanges();

        // 发送邮件
        transport.send(mimeMsg);
        transport.close();
    }

}

/**
 * 验证类(内部类)
 *
 * @author Administrator
 *
 */
class Email_Autherticatorbean extends Authenticator {
    private String m_username = null;
    private String m_userpass = null;

    public void setUsername(String username) {
        m_username = username;
    }

    public void setUserpass(String userpass) {
        m_userpass = userpass;
    }

    public Email_Autherticatorbean(String username, String userpass) {
        super();
        setUsername(username);
        setUserpass(userpass);

    }

    public PasswordAuthentication getPasswordAuthentication() {

        return new PasswordAuthentication(m_username, m_userpass);
    }
}

 

接下来,我们把这段代码直接放入已有的J2EE工程中,然后运行,抛出类没有找到的错误:

java.lang.NoClassDefFoundError: com/sun/mail/util/SharedByteArrayInputStream

具体到代码中查看,发现问题出在这行代码:

 

Session session = Session.getInstance(props);

这行代码的意思是通过javax.mail.Session 创建Session,但是在工程中有两个jar档都有这个类,一个是j2ee.jar,在WebSphere的Library中,另一个是mail.jar,在【Web App Libraries】中,也就是自己导入的,需要调用的jar档。

通过工程的属性的【Java Build Path】的【Order and Export】面板可以看到Library的顺序有问题 ,使用【Up】和【Down】调整一下顺序 ,把【Web App Libraries】放到上面,问题解决!

 

PS:如果在两个jar在同一个Library中,可以通过修改jar档的名字来调整调用顺序!


解决JavaMail发邮件抛出找不到SharedByteArrayInputStream类的异常

你可能感兴趣的:(解决JavaMail发邮件抛出找不到SharedByteArrayInputStream类的异常)