http://www.oracle.com/technetwork/cn/java/javase/downloads/jdk7-downloads-1880260.html
http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase6-419409.html
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase5-419410.html
