Encountering error while developing Spring-Hibernate e-commerce app with H2 database

Ecom
1

Hey everyone I’m working on a web store project using Spring Hibernate and H2. I’ve set up my controllers, DAOs, and config files but I’m running into trouble. When I try to launch it on Tomcat in Eclipse I get a big error about bean creation failing. It mentions that it cannot autowire the ProductDaoImpl and SessionFactory and the stack trace shows a NoClassDefFoundError for org/dom4j/DocumentException. I’ve double-checked my dependencies in pom.xml and my XML configs look right. Any ideas what could be causing this? I can share code snippets if needed.

@Controller
public class ShopController {

  @Autowired
  ItemDaoImpl itemDao;

  @RequestMapping("/items")
  public String getItems(Model model) {
    List<Item> items = itemDao.getAllItems();
    model.addAttribute("items", items);
    return "itemList";
  }

}
2

Hey MeditatingPanda, sounds like you’re working on an interesting project! I’ve run into similar issues before with Spring and Hibernate. Have you double-checked that all your JAR files are up to date and compatible? Sometimes version mismatches can cause weird errors like that.

Also, the NoClassDefFoundError for org/dom4j/DocumentException makes me wonder if there’s an issue with your XML parsing library. Are you using Dom4j explicitly anywhere in your code? If not, it might be a transitive dependency that’s not resolving correctly.

One thing that’s helped me debug these kinds of errors is to clean and rebuild the project, and maybe even delete your .m2 repository folder to force a fresh download of all dependencies. It’s a bit of a nuclear option, but it can sometimes fix mysterious classpath issues.

Have you tried running Maven from the command line with the -X flag for debug output? That might give you more insight into what’s going wrong during the build process.

Let me know if any of that helps or if you need more suggestions! What IDE are you using, by the way?

3

I’ve encountered similar issues with Spring-Hibernate setups before. The NoClassDefFoundError for org/dom4j/DocumentException suggests a missing dependency. Check your pom.xml and ensure you have the dom4j library explicitly declared. It’s often overlooked as it’s usually a transitive dependency.

Also, verify your Hibernate configuration. Make sure you’re using the correct dialect for H2. Sometimes, incorrect dialect settings can lead to unexpected errors during bean creation.

If these don’t resolve the issue, try clearing your project’s target folder and running a Maven update. This often helps resolve classpath issues. As a last resort, you might want to create a new Maven project and gradually migrate your code to isolate the problem.

4

hey, try checking ur hibernate config - ensure h2 dialet is set. also add dom4j depency in ur pom.xml. if issue persists, clean project & restart eclipse. hope it sorts it out!