jdk from 1.7 to 1.6
Revert "jdk from 1.7 to 1.6"

This reverts commit 6f25750213fce65e0335e4c0073c313c891cc61d.
test msjian
Revert "test msjian"

This reverts commit ee7cb6721753d1dd2ade54c50ce8a18642d4cd61.