Invocation of init method failed; nested exception is javalangNoClassDefFoundError comeetrustetcommonCommon

The error message suggests that the class com.eetrust.etcommon.Common cannot be found, resulting in the failure of the initialization method.

Here are a few possible causes and solutions for this issue:

1. Missing JAR file: Ensure that the JAR containing the Common class is included in the classpath of your application. If the JAR is missing, add it to the classpath and restart the application.

2. Incorrect package or class name: Double-check the package and class name of the Common class. Make sure it matches the import statement and the actual class definition.

3. Compilation or build issues: If you are using an IDE, try cleaning and rebuilding your project to ensure that all necessary dependencies are included correctly. If you are using a build tool like Maven or Gradle, ensure that the necessary dependencies are defined correctly in your project configuration.

4. Dependency issues: If the Common class depends on other classes or libraries, make sure those dependencies are also included in the classpath. Check for any missing or conflicting dependencies and resolve them.

5. Classloader issues: If you are using a custom classloader, ensure that it is correctly configured and loading the necessary classes. If the Common class is being loaded by a specific classloader, make sure that classloader has access to the required resources.

By investigating these possible causes, you should be able to determine the reason for the NoClassDefFoundError and resolve the issue accordingly