将Java EE与Javamail结合使用

Question

I have a application Java EE I have in class testmail this code

public Testmail() throws MessagingException, IOException, SQLException
{
    Properties props = System.getProperties();
    Session session = Session.getDefaultInstance(props, null);
    Store store = session.getStore("imaps");
    store.connect("imap.gmail.com", "mail@gmail.com", "passsword");
    //System.out.println(store);
    Folder inbox = store.getFolder("Personnel");
    inbox.open(Folder.READ_WRITE);
    FlagTerm ft = new FlagTerm(new Flags(Flags.Flag.SEEN), false);
    Message messages[] = inbox.search(ft);
    for(Message message:messages) 
    {
               //mycode
            }
public static void main(String[] args) throws MessagingException, IOException, SQLException 
{
    new Testmail();
}

this code is working in console.

In my servlet a have this code

                    //sum code
        S.setAttribute("user", user);
        try 
        {
            Testmail m=new Testmail();
        } 
        catch (MessagingException e) 
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        catch (SQLException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

           response.sendRedirect("listeemails.jsp");

but I have this problem

    sept. 12, 2013 11:58:55 PM org.apache.catalina.core.ApplicationContext log
INFO: La servlet Login est marqué comme indisponible
sept. 12, 2013 11:58:55 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Exception lors de l'allocation pour la servlet Login
java.lang.ClassNotFoundException: javax.mail.MessagingException
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1116)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    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:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
    at java.lang.Thread.run(Unknown Source)

Answer 1

您必须将文件javax.mail.jar复制到目录webcontent / web-inf / lib上并且其工作正常

Answer 2

Is javamail.jar in the webapp's classpath? Put another way, is javamail.jar bundled up in your project's WAR/EAR/etc., or in the lib directory of your app server? If it's on your build path in your IDE but isn't getting deployed with your webapp and isn't already on the app server, it'll be on the build path at compile time but not at deploy time.