javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command first

javax.mail.MessagingException:  530   5.7 . 0  Must issue a STARTTLS command first. u12sm73042tia. 38

    at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java: 879 )
    at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java: 599 )
    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java: 319 )
    at com.roadway.edmail.util.JMail2.sendMail(JMail2.java: 278 )
    at com.roadway.edmail.bo.feedback.FeedbackSender.sender(FeedbackSender.java: 72 )
    at org.apache.jsp.test_jsp._jspService(test_jsp.java: 59 )
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java: 70 )
    at javax.servlet.http.HttpServlet.service(HttpServlet.java: 717 )
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 374 )
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 342 )
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java: 267 )
    at javax.servlet.http.HttpServlet.service(HttpServlet.java: 717 )
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 290 )
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 206 )
    at com.roadway.edmail.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java: 20 )
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 235 )
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 206 )
    at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java: 164 )
    at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java: 141 )
    at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java: 90 )
    at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java: 417 )
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 235 )
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 206 )
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 233 )
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 191 )
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java: 128 )
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java: 102 )
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java: 109 )
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java: 286 )
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java: 845 )
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java: 583 )
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java: 447 )
    at java.lang.Thread.run(Thread.java: 619 )

解决方法:

if ( this .smtp.indexOf( " smtp.gmail.com " ) >= 0 )
             {
                properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
                properties.setProperty("mail.smtp.socketFactory.fallback", "false"); 
                properties.setProperty("mail.smtp.port", "465"); 
                properties.setProperty("mail.smtp.socketFactory.port", "465"); 
            }

在此作下符号,希望对自己加强记忆,对同行的朋友提供方便.^_^