关于用Java程序实现8421码权限管理 第四部分

自定义标签，标签处理器类：
PrivilegeTag.Java有权限的类设计：
package com.qizhi.tags.bean;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.tagext.TagSupport;
import com.qizhi.entity.Roleright;
import com.qizhi.web.form.UserForm;
/**
 * <qz:privilege />表示处理器类
 */
public class PrivilegeTag extends TagSupport
{
 private String beanName="login";
 private String scope="session";
 private String operation="none";
 
 public void setBeanName(String beanName)
 {
  this.beanName = beanName;
 }
 public void setScope(String scope)
 {
  this.scope = scope;
 }
 public void setOperation(String operation)
 { 
  this.operation = operation;
    }
 
 public int doStartTag(){
         UserForm init_bean=null;
    if (scope == null || scope.equals(""))
              return SKIP_BODY;
          else
          {
              if (scope.trim().equals("session"))
              {
                  HttpSession session = pageContext.getSession();
                  init_bean = (UserForm)session.getAttribute(beanName);
                  if (init_bean == null)
               &nbs