Hello action walkthrough

The hello demo is still the best first stop for explaining how Struts2 maps a request to an action and then routes to a JSP result.

Flow

• The browser requests /hello or /hello?name=Team.
• Struts populates the name property on HelloAction.
• execute() builds a view message and returns SUCCESS.
• The framework resolves the success result to /hello.jsp.

Minimal action shape

public class HelloAction extends ActionSupport {
    private String name;
    private String message;

    public String execute() {
        if (name == null || name.trim().isEmpty()) {
            name = "World";
        }
        message = "Hello, " + name + "!";
        return SUCCESS;
    }
}