Wicket 6：包括Javascript文件以script标签开头

Question

I guess the title is very self descriptive but here it goes nonetheless: I have a Panel where I would like to add multiple script tags with javascript files from my system.

I tried the following but script tags still not showing.

@Override
public void renderHead(IHeaderResponse response) {
  super.renderHead(response);
  for(String path : arrayOfJsFiles){
    response.render(JavaScriptHeaderItem
        .forReference(new PackageResourceReference(getClass(),
                path)));
  }

}

Answer 1

Without knowing the exact file hierarchy of your project I can't tell what exactly could the issue be, but I can give you some pointers.

Firstly, if I understand correctly, the javascript files are not in the same package as the class in which the code you supplied is executed. That is not quite what the PackageResourceReference expects. Package resource is a resource that is in the package of the file; so if you have a class com/custom/MyClass.java, your package resources should be also be located in the same folder, ie com/custom/some-javascript.js

For that reason in the constructor PackageResourceReference#PackageResourceReference(Class, String) you supply 2 things: the scope and the name . The scope is a class that is in the same package as the resources, the name is simply the name of the file, rather than the path to the file; the path is defined by the scope.

I'm not sure if it is the best approach, but when I need to use global resources, I don't actually ever construct a ResourceReference , but instead use JavaScriptHeaderItem.forUrl("./js/some-javascript.js") and such to render the resources (./js/ is the webapp/js/ folder).

However, I'm not sure if that is a correct way to deal with resources. I highly recommend reading this , as it covers resources quite well and could help you with your problem.