如何在Java平台上使用脚本语言做Java开发(1)

include Java

# set up constants to shorten the paths
SSLContext = javax.net.ssl.SSLContext
BlockingConnection = Java::org.xsocket.stream.BlockingConnection

#performs new BlockingConnection(String, int, SSLContext.getDefault(), boolean)
bc = BlockingConnection.new('smtp.web.de', 25, SSLContext::default, false) 
bc.receive_timeout_millis = 60 * 1000 # performs setReceiveTimeoutMillis(long)
puts bc.read_string_by_delimiter("\r\n")  # performs readStringByDelimiter(String)

bc.write("STARTTLS\r\n")  
puts bc.read_string_by_delimiter("\r\n")
bc.activate_secured_mode()

bc.write('AUTH PLAIN ' + ["\000" + 'from.me' + "\000" + 'myPassword'].pack('m'))
puts bc.read_string_by_delimiter("\r\n")

bc.write("HELO Server\r\n")
puts bc.read_string_by_delimiter("\r\n")

bc.write("MAIL FROM: from.me@web.de\r\n")
puts bc.read_string_by_delimiter("\r\n")

bc.write("RCPT TO: itsyou@gmx.net\r\n")
puts bc.read_string_by_delimiter("\r\n")

bc.write("data\r\n")
puts bc.read_string_by_delimiter("\r\n")

mail =
'Message-ID: 46D957AF.2020804
Date: Sat, 01 Sep 2007 14:14:39 +0200
From: from.me@web.de
User-Agent: my mail client
MIME-Version: 1.0
To: itsyou@gmx.net
Subject: what I have to say
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit

combining scripting languages with Java is great'

bc.write("#{mail}\r\n.\r\n")
puts bc.read_string_by_delimiter("\r\n")

bc.write("quit\r\n")
puts bc.read_string_by_delimiter("\r\n")
bc.close()

package test;

public class NonBlockingConnection  {
public void write(int i)  {
System.out.println("writing int " + i);
}
public void write(long l)  {
System.out.println("writing long " + l);
}
}

from java.lang import Integer
from test import NonBlockingConnection

# call 1 
NonBlockingConnection().write(214748364700) # call method based on python built-in data type
# prints out:
# writing long 214748364700

# call 2
NonBlockingConnection().write(55)  # call method based on python built-in data type
# prints out:
# writing long 55
# ups, not int?

# call 3
NonBlockingConnection().write(Integer(55))  

# pass over a Java object instead of python data type
# prints out:
# writing int 55