使用Java郵件通過Gmail SMTP發送郵件時出現問題

Question

我從此處復制代碼僅是為了使用Gmail SMTP服務器發送郵件。 但是我遇到了安全異常。 成功發送4封郵件后，我就達到了目標，但是后來根據我的應用程序需求，我對代碼進行了一些更改，這引發了安全異常。 我敢肯定它會起作用，但是會出現一些問題。

此代碼有什么問題？

代碼是：

    package com.ibm.lims;

    import java.security.Security;
    import java.util.Properties;

    import javax.mail.Message;
    import javax.mail.MessagingException;
    import javax.mail.Multipart;
    import javax.mail.PasswordAuthentication;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;

    public class mails {
        private static final String SMTP_HOST_NAME = "smtp.gmail.com";
        private static final String SMTP_PORT = "465";
        //private static final String emailMsgTxt = "robin borrowed a book";
        //private static final String emailSubjectTxt = "online library management system notification";
        private static final String emailFromAddress = "robins.lims2009@gmail.com";
        private static final String SSL_FACTORY ="javax.net.ssl.SSLSocketFactory";
        //private static final String[] sendTo = {"sendnearn@gmail.com","supersmartrobin@yahoo.co.in"};

        public static void mailer(String[] sendTo,String emailSubjectTxt,String emailMsgTxt) throws Exception{
            Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

            new mails().sendSSLMessage(sendTo,emailSubjectTxt,emailMsgTxt,emailFromAddress);
            System.out.println("Sucessfully Sent mail to All Users");
        }

        public void sendSSLMessage(String[] recipients,String subject,String message,String from) throws MessagingException {
            boolean debug = true;

            Properties props = new Properties();
            props.put("mail.smtp.host", SMTP_HOST_NAME);
            props.put("mail.smtp.auth", "true");
            props.put("mail.debug", "true");
            props.put("mail.smtp.port", SMTP_PORT);
            props.put("mail.smtp.socketFactory.port", SMTP_PORT);
            props.put("mail.smtp.socketFactory.class", SSL_FACTORY);
            props.put("mail.smtp.socketFactory.fallback", "false");

            Session session = Session.getDefaultInstance(props,new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication("robins.lims2009@gmail.com","weakpaasword");
                }
            }
        );

        MimeMessage message1 =new MimeMessage(session);
        message1.setFrom(new InternetAddress(from));
        for(int i=0;i<=recipients.length;i++){
            message1.addRecipient(Message.RecipientType.TO,new InternetAddress(recipients[i]));
        }

        message1.setSubject(subject);

        // Create the message part.
        MimeBodyPart messageBodyPart =new MimeBodyPart();

        //Fill message.
        messageBodyPart.setText(message);

        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);

        // Part two is attachment.

        // Put parts in message
        message1.setContent(multipart);

        // Send the message
        Transport.send( message1 );
        }

    }

我以前從JSP調用它為：

    <%
        String requestedopration = request.getParameter("operation");
        if("Borrow".equalsIgnoreCase(requestedopration)){
            Borrow borrow = new Borrow();
            borrow.setBook_id(request.getParameter("bookid"));
            borrow.setUser_id((String)session.getAttribute("userid"));

            boolean c=LimsHandler.getInstance().borrowbook(borrow);
            if(c){
            final String[] sendTo = {"sendnearn@gmail.com","supersmartrobin@yahoo.co.in"};

        mails.mailer(sendTo,"lims notification","robin borrowed a book");

    %>

但是我遇到了安全異常。 我得到異常為：

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception
org.apache.jasper.JasperException: java.lang.ArrayIndexOutOfBoundsException: 2
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:413)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:806)

root cause
java.lang.ArrayIndexOutOfBoundsException: 2
    com.ibm.lims.mails.sendSSLMessage(mails.java:64)
    com.ibm.lims.mails.mailer(mails.java:35)
    org.apache.jsp.borrow_jsp._jspService(borrow_jsp.java:144)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:806)

note The full stack trace of the root cause is available in the Apache Geronimo (Embedded Tomcat/6.0.20-20090724) logs.
Apache Geronimo (Embedded Tomcat/6.0.20-20090724)

Answer 1

從JDK 1.4.0開始，您無需指定SSL提供程序，因為它是內置在JDK中的。 查看Sun的解釋以及如何通過JavaMail使用GMail的示例：

Answer 2

您似乎沒有為ssl設置郵件傳輸協議。 嘗試添加props.put（“ mail.transport.protocol”，“ smtps”）;。 基於JavaMail站點的此代碼段，您可能還需要添加“ mail.smtps.auth”，“ true”。

String host = "smtp.gmail.com;
String username = "user";
String password = "passwd";
Properties props = new Properties();
props.put("mail.smtps.auth", "true");
// ...
MimeMessage msg = new MimeMessage(session);
// set the message content here
Transport t = session.getTransport("smtps");
try {
t.connect(host, username, password);
t.sendMessage(msg, msg.getAllRecipients());
} finally {
t.close();
}

是的，方法不同，但是使用的屬性相同。

Answer 3

您的代碼似乎很好，除了循環是錯誤的。 使用“ <”而不是“ <=”，則不會獲得ArrayIndexOutOfBoundException。

for (int i = 0; i < recipients.length; i++) {
    message1.addRecipient(Message.RecipientType.TO,
    new InternetAddress(recipients[i]));
}