securityfilter.java

来自「结合WebWork+Spring+Hibernate」· Java 代码 · 共 43 行

package news.wzt.util;

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 SecurityFilter implements Filter {

	public void destroy() {
		// TODO 自动生成方法存根

	}

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)res;
		if(request.getSession().getAttribute("user")==null){
			
			String path=request.getContextPath();
				response.sendRedirect(path+"/index.jsp");
		}
		else{
			
			chain.doFilter(request, response);
		}

	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO 自动生成方法存根

	}

}