在谷歌的Web应用程序

Question

从发送电子邮件的servlet我创建从中我想发送电子邮件谷歌的Web应用程序。我已经创建了以下用于发送邮件的方法，这很好。

public void send(String recipient) throws Exception { 
    Properties props = new Properties(); 

    props.put("mail.transport.protocol", "smtps"); 
    props.put("mail.smtps.host", SMTP_HOST_NAME); 
    props.put("mail.smtps.auth", "true"); 
    props.put("mail.smtps.quitwait", "false"); 

    Session mailSession = Session.getDefaultInstance(props); 
    mailSession.setDebug(true); 
    Transport transport = mailSession.getTransport(); 

    MimeMessage message = new MimeMessage(mailSession); 
    message.setSubject(MESSAGE_SUBJECT); 
    message.setContent(MESSAGE_BODY, "text/plain"); 

    message.addRecipient(Message.RecipientType.TO, new InternetAddress(
      recipient)); 

    transport.connect(SMTP_HOST_NAME, SMTP_AUTH_USER, SMTP_AUTH_PWD); 

    transport.sendMessage(message, 
      message.getRecipients(Message.RecipientType.TO)); 
    transport.close(); 
} 

但是，当我尝试从一个servlet在web应用程序，我得到叫它如下：

HTTP ERROR 500 

Problem accessing /tokenAndSecret. Reason: 

    javax.net.ssl.SSLSocketFactory is a restricted class. Please see the Google App Engine developer's guide for more details. 

Caused by: 

java.lang.NoClassDefFoundError: javax.net.ssl.SSLSocketFactory is a restricted class. Please see the Google App Engine developer's guide for more details. 
     at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:51) 
     at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:279) 
     at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231) 
     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900) 
     at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638) 
     at javax.mail.Service.connect(Service.java:248) 
     at javax.mail.Service.connect(Service.java:91) 
     at com.sirma.itt.saas.api.mail.SSLMailSender.send(SSLMailSender.java:64) 
     at com.sirma.itt.saas.app.servlets.TokenAndSecretServlet.doGet(TokenAndSecretServlet.java:71) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
     at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
     at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
     at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
     at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
     at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
     at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) 
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
     at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
     at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
     at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
     at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
     at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
     at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78) 
     at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
     at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:363) 
     at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
     at org.mortbay.jetty.Server.handle(Server.java:326) 
     at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
     at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) 
     at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) 
     at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) 
     at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
     at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) 
     at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 

任何想法是什么原因造成这一点，如何能解决吗？

Answer 1

App Engine不支持打开插座。而应使用Mail Api从App Engine发送邮件。