customrequestprocessor.java

Java开发的权限管理的例子

package org.artemis.manager.common;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.RequestProcessor;

/*   struts-config.xml 配置
      <controller 
      contentType="text/html;charset=UTF-8"
      locale="true"
      nocache="true"
      processorClass="com.oceanus.struts.CustomRequestProcessor"
      />
 */
public class CustomRequestProcessor extends RequestProcessor {
	protected boolean processPreprocess(HttpServletRequest request,
			HttpServletResponse response) {
		HttpSession session = request.getSession(false);
		System.out.println("CustomRequestProcessor 开始工作");
		// If user is trying to access login page
		// then don't check
		if (request.getServletPath().equals("/loginInput.do")
				|| request.getServletPath().equals("/login.do"))
			return true;
		// Check if userName attribute is there is session.
		// If so, it means user has allready logged in
		if (session != null && session.getAttribute("userName") != null)
			return true;
		else {
			// try{
			// //If no redirect user to login Page
			// request.getRequestDispatcher
			// ("/login.jsp").forward(request,response);
			// }catch(Exception ex){
			// }
			return true;
		}
		// return false;
	}

	protected void processContent(HttpServletRequest request,
			HttpServletResponse response) {
		// Check if user is requesting ContactImageAction
		// if yes then set image/gif as content type
		if (request.getServletPath().equals("/contactimage.do")) {
			response.setContentType("image/gif");
			return;
		}
		super.processContent(request, response);
	}

}