(As for online course selection, it has been repaired on the original basis. I hope you can learn together
ch04\.settings\ponent
ch04\.settings\org.eclipse.core.resources.prefs
ch04\.settings\org.eclipse.jdt.core.prefs
ch04\.settings\org.eclipse.jstmon.project.facet.core.prefs
ch04\.settings\org.eclipse.wstmon.project.facet.core.xml
ch04\build\classes\ch04\servlet\AddCourse.class
ch04\build\classes\ch04\servlet\ChooseCourse.class
ch04\build\classes\ch04\servlet\Common.class
ch04\build\classes\ch04\servlet\CourseList.class
ch04\build\classes\ch04\servlet\Login.class
ch04\build\classes\ch04\servlet\ViewCourse.class
ch04\build\classes\ch04\Course.class
ch04\build\classes\create.sql
ch04\src\ch04\servlet\AddCourse.java
ch04\src\ch04\servlet\ChooseCourse.java
ch04\src\ch04\servlet\Common.java
ch04\src\ch04\servlet\CourseList.java
ch04\src\ch04\servlet\Login.java
ch04\src\ch04\servlet\ViewCourse.java
ch04\src\ch04\Course.java
ch04\src\create.sql
ch04\WebContent\common\cmnScript.js
ch04\WebContent\common\cmnStyle.css
ch04\WebContent\inc\cmnAuthenticate.jsp
ch04\WebContent\META-INF\MANIFEST.MF
ch04\WebContent\WEB-INF\classes\ch05\controller\Address.class
ch04\WebContent\WEB-INF\classes\ch05\controller\Common.class
ch04\WebContent\WEB-INF\classes\ch05\controller\Composite.class
ch04\WebContent\WEB-INF\classes\ch05\controller\Inbox.class
ch04\WebContent\WEB-INF\classes\ch05\controller\Login.class
..... Too many files omitted)