hasauthoritytag.java

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package com.sinosoft.user;

import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;//为了处理exception
import java.io.*;

public class hasAuthorityTag extends TagSupport{
	//声明参数、上下文及设置、调用方法
	private String authorityID = "";
	public PageContext pageContext;	
	
	public void setPageContext(PageContext pc) {
	 pageContext = pc ;
	}

	public void setAuthorityID (String authorityID){
		this.authorityID = authorityID;
	}
	public String getAuthorityID (){
		return authorityID;
	}

//tag开始执行
	public int doStartTag() throws JspException{
		JspWriter out = this.pageContext.getOut();
		String session = (String)this.pageContext.getSession().getAttribute("UserID");
		//String session = "admin";

      	try{
			if (session == null)
				out.println("<script language='javascript'>window.top.location.href='/NCL/mis/passport/login/loginForm.jsp';</script>");
			if (session !=null && session.equals(""))
				out.println("<script language='javascript'>window.top.location.href='/NCL/mis/passport/login/loginForm.jsp';</script>");
			
			if (this.authorityID ==null )
				return EVAL_BODY_INCLUDE ;
			if (this.authorityID !=null && this.authorityID.equals(""))
				return EVAL_BODY_INCLUDE ;
			if (User.checkUserAuthID(session,this.authorityID))		//通过登录帐号判断,session中记录的是用户登录帐号
        		return EVAL_BODY_INCLUDE ;
			else     
				return SKIP_BODY ;

     	}catch(IOException je){
     		throw new JspException(je.getMessage()); 
     	}catch(Exception ex){
     		System.out.println(ex.getMessage());
     		return SKIP_BODY;
     	}
	}
	public int doEndTag(){
		return EVAL_PAGE;
	}
}