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NeedLogonFilter.java
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60 lines (50 loc) · 2.1 KB
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package com.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import com.valueBean.UserSingle;
public class NeedLogonFilter implements Filter {
private FilterConfig fc;
public void destroy() {
this.fc=null;
}
public void doFilter(ServletRequest sRequest, ServletResponse sResponse,FilterChain chain) throws IOException, ServletException {
HttpServletRequest request=(HttpServletRequest)sRequest;
HttpSession session=request.getSession();
Object logoner=session.getAttribute("logoner");
if(logoner!=null&&(logoner instanceof UserSingle)) //用户已经登录
chain.doFilter(sRequest,sResponse);
else{ //没有登录
String message="";
if("review".equals(request.getParameter("action"))){ //如果进行的是"发表评论"、"发表留言"的操作
String noname=request.getParameter("noname");
if(!"true".equals(noname)){ //若不是匿名发表
message="<li>您没有登录！</li><a href='javascript:window.history.go(-1)'>【返回】</a>";
request.setAttribute("message",message);
String forward=fc.getServletContext().getInitParameter("messagePage");
RequestDispatcher rd=request.getRequestDispatcher(forward);
rd.forward(sRequest,sResponse);
}
else //若是匿名发表
chain.doFilter(sRequest,sResponse);
}
else{ //如果进行的是其他操作，如＂加为好友＂
message="<li>您没有登录！</li><a href='javascript:window.history.go(-1)'>【返回】</a>";
request.setAttribute("message",message);
String forward=fc.getServletContext().getInitParameter("messagePage");
RequestDispatcher rd=request.getRequestDispatcher(forward);
rd.forward(sRequest,sResponse);
}
}
}
public void init(FilterConfig fc) throws ServletException {
this.fc=fc;
}
}