(A simple example of httpclient3 helps you learn about httpclient3.
httpclient\libs\commons-codec-1.3.jar
httpclient\libs\commons-httpclient-3.1.jar
httpclient\libs\commons-logging-1.1.1.jar
httpclient\src\LoginKaixin.java
httpclient\src\TaoBaoLogin.java)