java - 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，我必须将许多 servlet 转换为 Struts2 操作。我想使用 ServletRequestAware、ServletResponseAware 和 SessionAware 接口(interface)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;
     }

}

---

现在假设我有一个像下面这样的 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");
       }
}

有人可以编写一个扩展 BaseAction 等同于 Servlet 的 Action 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。获取和设置请求参数和 session 的 http 内容由 struts2 框架轻松处理:

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>