The order of loading the class files in the jar files under the classes folder in the Java Web project and the jar files in the WEB-INF/lib

To publish to WebLogic, you can configure it in webcontent \ WEB-INF \ weblogic. xml.
The configuration is as follows:
<? XML version = "1.0" encoding = "UTF-8"?>
<Weblogic-web-app xmlns = "http://www.bea.com/ns/weblogic/90"
Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"
Xsi: schemalocation = "http://java.sun.com/xml/ns/j2ee
Http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd
Http://www.bea.com/ns/weblogic/90

Http://www.bea.com/ns/weblogic/90/weblogic-web-app.xsd>
<Container-Descriptor>
<! -- After modifying the jvav class, the jvav class does not automatically restart. In debug mode, the logic of the modification method does not need to be restarted. However, changing the method parameters can only be used after restart. -->
<Servlet-reload-check-secs>-1 </servlet-reload-check-secs>
<! -- <Resource-reload-check-secs>-1 </resource-reload-check-secs>
<! -- Web-INF/classes is better than lib loading -->
<Prefer-web-INF-classes> true </prefer-web-INF-classes> -->
</Container-Descriptor>
<! -- URL root path -->
<Context-root> </context-root>
<JSP-Descriptor>
<! -- View (Debug) the Java source file \ servers \ adminserver \ TMP \ _ wl_user \ webapp \ XXX \ jsp_servlet \ _ JSP \ _ compiled by JSP -->
<Keepgenerated> true </keepgenerated>
<! -- Do not restart the service to automatically load the modified JSP -->
<Page-check-seconds> 1 </page-check-seconds>
</JSP-Descriptor>
</Weblogic-web-app>

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classloader loading sequence at Tomcat startup
List of Tomcat class loading priorities
1. the first is the JAR file under $ java_home/JRE/lib/EXT.
2. jar and class files in the environment variable classpath.
3. $ class file under catalina_home/common/classes.
4. $ catalina_home/commons/endorsed JAR file.
5. $ catalina_home/commons/i18n.
6. $ catalina_home/common/lib.
(jar files such as the JDBC driver can be stored here, so that the JDBC driver cannot be found when the data source is configured in server. xml .)
7. $ class file under catalina_home/Server/classes.
jar files under 8. $ catalina_home/Server/lib.
9. $ catalina_base/shared/classes Class file.
10. $ catalina_base/shared/lib.
11. Their specific webapp/WEB-INF/classes class files.
12. Their specific jar files under webapp/WEB-INF/lib.