The "ClassNotFoundException: org.springframework.ui.freemarker.FreeMarkerConfigurationFactory" error typically occurs when a required class is not found in the classpath. Here's an explanation for each step:
Class Loading: When a Java program is executed, the Java Virtual Machine (JVM) loads classes as they are referenced.
Classpath: The classpath is a parameter that tells the JVM where to look for classes and packages. It can include directories, JAR files, and ZIP files.
Missing Class: If the class "org.springframework.ui.freemarker.FreeMarkerConfigurationFactory" is not found in the specified classpath, the JVM throws a ClassNotFoundException.
Resolution: To resolve this error, ensure that the required JAR file containing the class is included in the classpath. Additionally, verify that the class name is spelled correctly and that the JAR file is not corrupted.
Dependency Management: If the class is part of a third-party library, ensure that the appropriate version of the library is included in the project's dependencies.
By understanding these steps, developers can troubleshoot and resolve the "ClassNotFoundException" error effectively.