Java TagSupport实现Web权限验证标签

 以下是本人在项目中用Java TagSupport实现的Web权限验证标签:

package com.sunfairs.tags;import javax.servlet.http.HttpSession;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.TagSupport;import com.sunfairs.constant.ShopConstants;public class AuthorityTag extends TagSupport {private String power;public String getPower() {return power;}public void setPower(String power) {this.power = power;}@Overridepublic int doAfterBody() throws JspException {return super.doAfterBody();}@Overridepublic int doEndTag() throws JspException {return super.doEndTag();}@Overridepublic int doStartTag() throws JspException {HttpSession session = pageContext.getSession();String userPower = (String) session.getAttribute(ShopConstants.LOGIN_POWER);if(power.indexOf(userPower) != -1||power.equals("*")){return EVAL_PAGE;}return SKIP_BODY;}}