This sends messages as slackbot to slack

Slack message

/**
*  This sends messages as slackbot to slack using groovy
*/

String.metaClass.encodeURL = {
    java.net.URLEncoder.encode(delegate, "UTF-8")
}

def address = "https://slack.com/api/"
def method = "chat.postMessage"

def token = "Your API Token goes here"
def username = "slackbot"
def channel = "#general" //"@specific.teammember"

def text = "I am sentient slackbot."


def url = address + method +
        '?' + 'token=' + token +
        '&' + 'text=' + text.encodeURL() +
        '&' + 'channel=' + channel.encodeURL() +
        '&' + 'username=' + username.encodeURL()

println new URL(url).text