setsessionfilter.java

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package xiong.gang.servlet;

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;

public class SetSessionFilter implements Filter {

	public void destroy() {
	}

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)res;
		//DataSourceServlet data=null;
		//request.setCharacterEncoding("gbk");
		if(!(request.getSession().getAttribute("sname")==null)||!(request.getSession().getAttribute("tname")==null)||!(request.getSession().getAttribute("mname")==null))
		{
			DataSourceServlet.cloes();
			request.getSession().setMaxInactiveInterval(900);
			chain.doFilter(request, response);
			
		}else{
			response.sendRedirect(request.getContextPath()+"/login.jsp");
		}

	}

	public void init(FilterConfig arg0) throws ServletException {
		
	}

}