【Java】Tomcat Class Loader 載入順序

tags: Java Tomcat

Order 載入順序

1. Bootstrap classes of your JVM (Core java classes)
2. /WEB-INF/classes of your web application
3. /WEB-INF/lib/*.jar of your web application
4. System class loader classes (Tomcat / Classpath specific classes)
5. Common class loader classes (classes common to all web apps)
   • servlet-api.jar

delegate=“true”

• Proxy 模式
• 若 context.xml <Loader delegate="true"/>
• 載入順序
  1. Bootstrap classes of your JVM (Core java classes)
  2. System class loader classes (Tomcat / Classpath specific classes)
  3. Common class loader classes (classes common to all web apps)
  4. /WEB-INF/classes of your web application
  5. /WEB-INF/lib/*.jar of your web application

延伸閱讀

• 含JVM class loader：圖解Tomcat類加載機制

Reference 參考文件

• Class Loader HOW-TO