Review the search sequence of struts2 action names

1. obtain the URI of the Request Path. For example, the URL is http: // server/struts2/path1/path2/path3/test. action 2. first, find the package whose namespace is/path1/path2/path3. If this package exists, search for the action named test in this package. If this package does not exist, go to step 3; 3. find the package whose namespace is/path1/path2. If this package exists, search for the action named test in this package. If this package does not exist, go to step 4; 4. find the package whose namespace is/path1. If the package exists, search for the action named test in the package. If the package still does not exist, go to the package of the default namaspace and find the package named test. Action (the default namespace is an empty string ""). If it still cannot be found, the page prompts that the action cannot be found. If the package in the path exists, but this action does not exist, it will go to the default namespace to find the default namespace for this action, and namespace is not set, the default Suffix of the Null String in struts2 is action, so you can add action or not at the end of the access path.