Hey there, let's get this sorted out—this error is almost always tied to a missing or misconfigured dependency, especially since your project worked perfectly before reimporting. Here are step-by-step fixes to resolve the issue:

Root Cause #

The SerializationUtils class lives in Spring Batch's spring-batch-support module. When you reimported your Ivy project into a new workspace, IntelliJ likely didn't properly pull in this dependency or add it to your runtime classpath.

Step 1: Verify your Ivy dependency configuration #

First, open your ivy.xml file and confirm the spring-batch-support dependency is declared, with a version matching your other Spring Batch components. It should look like this:

<dependency 
    org="org.springframework.batch" 
    name="spring-batch-support" 
    rev="your-spring-batch-version" 
    conf="compile->default"
/>

Replace your-spring-batch-version with the exact version you’re using (e.g., 4.3.8).

Step 2: Refresh Ivy dependencies in IntelliJ #

IntelliJ often fails to auto-sync Ivy dependencies after reimports. Fix this by:

• Opening the Ivy tool window (usually on the right side; if missing, go to View > Tool Windows > Ivy).
• Clicking the circular arrow Refresh button to re-download and sync all dependencies.
• Alternatively, right-click your project in the Project view, hover over Ivy, and select Refresh Ivy Dependencies.

Step 3: Check module classpath settings #

If the dependency is in ivy.xml but still unrecognized:

1. Go to File > Project Structure > Modules.
2. Select your project module, then switch to the Dependencies tab.
3. Look for spring-batch-support in the list. If it’s missing:
   • Click the + button at the top, select Library > Ivy.
   • Locate spring-batch-support in the available Ivy dependencies and add it.
4. Ensure the scope is set to Compile or Runtime (match your project’s needs).

Step 4: Validate your run configuration #

If you’re using a Run/Debug Configuration to launch the project:

1. Open the Run/Debug Configurations dialog (click the dropdown next to the run button, then select Edit Configurations).
2. Select your configuration, then switch to the Classpath tab.
3. Confirm spring-batch-support.jar is listed under User classes. If not:
   • Click Use classpath of module and select your main project module.
   • Or manually add the jar by clicking + > JARs or directories and navigating to your .ivy2 folder where the dependency is stored.

Step 5: Clean, rebuild, and invalidate caches #

Cached data can cause unexpected issues. Try these steps:

• Run Build > Clean Project to remove old build artifacts.
• Follow with Build > Rebuild Project to compile everything from scratch.
• Finally, clear IntelliJ’s cache: go to File > Invalidate Caches..., select Invalidate and Restart, and let the IDE restart and reindex your project.

Bonus: Check Ivy repository settings #

If none of the above works, verify your Ivy repositories are accessible:
Go to File > Settings > Build, Execution, Deployment > Build Tools > Ivy and ensure the repository URLs are correct and reachable.

内容的提问来源于stack exchange，提问作者John Humanyun