java ssh

• sshj (currently best choice)

  https://github.com/shikhar/sshj

• ssh used in jenkins-ci

  https://github.com/jenkinsci/trilead-ssh2

• jsh (据说缺乏文档，但很流行）

  http://www.jcraft.com/jsch/

• apache sshd

  http://mina.apache.org/sshd-project/