将 Servlet 转换为 Struts2 操作类

Question

我正在将一个动态 Web 项目移植到 Struts2，并且必须将许多 servlet 转换为 Struts2 操作。我想使用 ServletRequestAware、ServletResponseAware 和 SessionAware 接口并保持大部分代码不变。请看一下我通过 GOOGLin' 找到的 BaseAction.java 类。我想使用它，以便我可以执行其他操作来简单地扩展 BaseAction。

BaseAction.java

public abstract class BaseAction extends ActionSupport implements SessionAware, ServletRequestAware,ServletResponseAware, ServletContextAware{

 private static final long serialVersionUID = 1L;
  protected Map session;
     protected HttpServletRequest request;
     protected HttpServletResponse response;

     public String execute() throws Exception {
         return doExecute();
     }

     protected abstract String doExecute() throws Exception;

  public Map getSession() {
         return session;
     }

     public void setSession(Map sess) {
         this.session = sess;
     }

     public HttpServletRequest getServletRequest() {
         return request;
     }

     public void setServletRequest(HttpServletRequest req){
         this.request = req;
     }

     public HttpServletResponse getServletResponse() {
         return response;
     }

     public void setServletResponse(HttpServletResponse resp) {
         this.response = resp;
     }

}

---

现在假设我有一个如下所示的 servlet： Servlet.java

public class Servlet extends HttpServlet
{
 private static Logger log = Logger.getLogger(Servlet.class);

 public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException
 {
  HttpSession session=request.getSession();
 Bean bean= new Bean();
 bean.setName(request.getParameter("xxx"));
        session.setAttribute("bean");
        response.sendRedirect("login.jsp");
       }
}

有人可以编写一个相当于 Servlet 的扩展 BaseAction 的操作类吗？ 提前致谢。

Answer 1

由于您使用的是 Struts2，我建议您充分利用该框架提供的所有功能，而不是尝试破解现有的 servlet 代码。 struts2 框架可以轻松处理获取和设置请求参数和会话的 http 内容：

public class NewAction implements SessionAware {

  private Map theSession;
  private XXX xxx;

  public String execute() {
    Bean b = new Bean();
    b.setXXX(xxx);
    theSession.put(b);

    return "success";
  }

  public XXX getXXX() {
    return xxx;
  }

  public void setXXX(XXX xxx) {
    this.xxx = xxx;
  }

  public Map getSession() {
    return theSession;
  }

  public void setSession(Map session) {
    theSession = session;
  }
}

您的 struts.xml 应该包含该操作的条目：

<action name="NewAction" class="yourapp.NewAction">
  <result type="redirect">login.jsp</result>
</action>

Answer 2

我希望下面的示例能帮助你..

public class YourAction extends BaseAction {

    private static final long serialVersionUID = -6113083300296539328L;

    private static final Logger logger = Logger.getLogger(YourAction .class);

    private Bean bean;

    public String get() throws ApplicationException {
    try {
        this.setBean(getService().fetchBeanById(
                getHttpRequest().getParameter(
                "xxxx")));
    } catch (Exception e) {
        logger.error(new String[] { " Exception listing Comment ",
                e.toString() });
        throw new ApplicationException(e);
    }
        return SUCCESS;
    }

    public Bean getBean() {
        return bean;
    }

    public void setBean(Bean bean) {
        this.bean= bean;
    }
}