CustomSubSystemEntranceRedirectFilter.java

package com.norteksoft.acs.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import com.norteksoft.product.util.PropUtils;

public class CustomSubSystemEntranceRedirectFilter implements Filter {
	
	public void destroy() { }

	public void doFilter(ServletRequest req, ServletResponse rep,
			FilterChain chan) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) rep;
		
		String url=request.getRequestURI();
		if(url.endsWith("/")){
			url=url.substring(0,url.lastIndexOf("/"));
		}
		String systemCode=url.substring(url.lastIndexOf("/")+1);
		String redirectUrl=PropUtils.getProp("customRedirectUrl.properties",systemCode);
		if(StringUtils.isNotEmpty(redirectUrl)){
			//解决系统间换肤问题_r=1
			if(redirectUrl.contains("?")){
				redirectUrl=redirectUrl+"&_r=1";
			}else{
				redirectUrl=redirectUrl+"?_r=1";
			}
			response.sendRedirect(url+redirectUrl);
		}else{
			chan.doFilter(req, rep);
		}
			
	}

	public void init(FilterConfig arg0) throws ServletException { }
}