Java Reference
In-Depth Information
ex
.
printStackTrace
();
}
finally
{
// Transport does not implement AutoCloseable :-(
if
(
t
!=
null
)
{
try
{
t
.
close
();
}
catch
(
MessagingException
ex
)
{
}
}
}
}
}
In this example I've taken advantage of multi-catch from Java 7. Unfortunately
Trans
port
does not implement
AutoCloseable
—the JavaMail API still needs to be compatible
with Java 6—so I do have to check whether the
transport
object is non-null, close it,
and catch and ignore any exceptions while closing, all in a
finally
block.
An alternative is to use the static
Transport.send()
method introduced in JavaMail
1.5, which does close itself internally. To do this, you configure the connection with
system properties.
Properties
props
=
new
Properties
();
props
.
put
(
"mail.smtp.host"
,
"smtp.gmail.com"
);
props
.
put
(
"mail.transport.protocol"
,
"smtps"
);
Session
session
=
Session
.
getInstance
(
props
);
MimeMessage
msg
=
new
MimeMessage
(
session
);
try
{
Address
bill
=
new
InternetAddress
(
"god@microsoft.com"
,
"Bill Gates"
);
Address
elliotte
=
new
InternetAddress
(
"elharo@ibiblio.org"
);
msg
.
setText
(
"Resistance is futile. You will be assimilated!"
);
msg
.
setFrom
(
bill
);
msg
.
setRecipient
(
Message
.
RecipientType
.
TO
,
elliotte
);
msg
.
setSubject
(
"You must comply."
);
Transport
.
send
(
msg
,
"erharold"
,
"password"
);
}
catch
(
MessagingException
|
UnsupportedEncodingException
ex
)
{
ex
.
printStackTrace
();
}
Sending Email from an Application
Example 2-1
is a simple application that sends a fixed message to a known address with
a specified subject. Once you see how to do this, it's straightforward to replace the strings
that give the message address, subject, and body with data read from the command line,
a GUI, a database, or some other source. For instance,
Example 2-2
is a very simple GUI
for sending email.
Figure 2-1
shows the program running.
