File list (Check if you may need any files):
excelDemo\.classpath
.........\.project
.........\.settings\org.eclipse.jdt.core.prefs
.........\.settings
.........\bin\com\demo\excel\Common3rdUser.class
.........\...\...\....\.....\ExcelUtil.class
.........\...\...\....\.....\ExcelUtilTest.class
.........\...\...\....\excel
.........\...\...\demo
.........\...\com
.........\bin
.........\friends.xls
.........\lib\commons-lang-2.3.jar
.........\...\jxl.jar
.........\lib
.........\src\com\demo\excel\Common3rdUser.java
.........\...\...\....\.....\ExcelUtil.java
.........\...\...\....\excel
.........\...\...\demo
.........\...\com
.........\src
.........\test\com\demo\excel\ExcelUtilTest.java
.........\....\...\....\excel
.........\....\...\demo
.........\....\com
.........\test
excelDemo