File list (Check if you may need any files):
payment
.......\.classpath
.......\.mymetadata
.......\.project
.......\src
.......\...\cn
.......\...\..\cast
.......\...\..\....\servlet
.......\...\..\....\.......\PaymentRequest.java
.......\...\..\....\.......\PaymentResutlResponse.java
.......\...\..\....\utils
.......\...\..\....\.....\ConfigInfo.java
.......\...\..\....\.....\DigestUtil.java
.......\...\..\....\.....\PanymentUtil.java
.......\...\merchantInfo.properties
.......\WebRoot
.......\.......\index.jsp
.......\.......\META-INF
.......\.......\........\MANIFEST.MF
.......\.......\WEB-INF
.......\.......\.......\classes
.......\.......\.......\.......\cn
.......\.......\.......\.......\..\cast
.......\.......\.......\.......\..\....\servlet
.......\.......\.......\.......\..\....\.......\PaymentRequest.class
.......\.......\.......\.......\..\....\.......\PaymentResutlResponse.class
.......\.......\.......\.......\..\....\utils
.......\.......\.......\.......\..\....\.....\ConfigInfo.class
.......\.......\.......\.......\..\....\.....\DigestUtil.class
.......\.......\.......\.......\..\....\.....\PanymentUtil.class
.......\.......\.......\.......\merchantInfo.properties
.......\.......\.......\lib
.......\.......\.......\...\jstl.jar
.......\.......\.......\...\standard.jar
.......\.......\.......\page
.......\.......\.......\....\connection.jsp
.......\.......\.......\....\paymentResult.jsp
.......\.......\.......\web.xml