struts2开发action 的三种方法以及通配符、路径匹配原则、常量

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";
    }
}