public class UserAction extends ActionSupport {

    // Action中业务处理方法

    public String login() {

        System.out.println("UserAction.login()");

//      return "success";

        return SUCCESS;

    }

}

public class UserAction3 implements Action {

    // Action中业务处理方法

    public String login() {

        System.out.println("UserAction.login()");

        return "success";

    }

    @Override

    public String execute() throws Exception {

        return null;

    }

}

public class UserAction {

    private String userName;

    public void setUserName(String userName) {

        this.userName = userName;

    }

    // Action中业务处理方法

    public String login() {

        System.out.println("UserAction.login()" + userName);

        return "login";

    }

    public String register() {

        System.out.println("register()" + userName);

        return "register";

    }

}