File list (Check if you may need any files):
payment
.......\.classpath
.......\.myeclipse
.......\.mymetadata
.......\.project
.......\.settings
.......\.........\org.eclipse.jdt.core.prefs
.......\src
.......\...\cn
.......\...\..\itcast
.......\...\..\......\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
.......\.......\.......\.......\..\itcast
.......\.......\.......\.......\..\......\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