标签：getc code public over end ext 配置 color ini
在web.xml中配置登陆过滤器：
<!-- 配置登陆过滤器 --> <filter> <filter-name>loginFilter</filter-name> <filter-class>weijiabin.BBS.Utils.LoginFilter</filter-class> <init-param> <param-name>passUrl</param-name> <param-value>index;login;FunctionServlet</param-value> </init-param> </filter> <filter-mapping> <filter-name>loginFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
上边代码中的param-value用来设置不进行拦截的地址关键字（以;作为分隔符），在下边过滤器代码中用passUrl表示
然后写过滤器代码：
public class LoginFilter implements Filter {
@Override
public void destroy() {
// TODO Auto-generated method stub
}
String passUrl = "";
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
throws IOException, ServletException {
HttpServletRequest httpRequest=(HttpServletRequest)arg0;
HttpServletResponse httpResponse=(HttpServletResponse)arg1;
HttpSession session=httpRequest.getSession();
String[] strArray = passUrl.split(";");
//下边循环作用是依次检查访问的url中是否包含passurl中的关键字，如果包含则不进行拦截
for (String str : strArray) {
if (str.equals(""))//如果在上边配置中设置的url为空，则说明都需要进行拦截，跳过此循环
continue;
if (httpRequest.getRequestURL().indexOf(str) >= 0) {
arg2.doFilter(httpRequest, httpResponse);
return;
}
}
if(session.getAttribute("sessionUser")!=null){
arg2.doFilter(httpRequest, httpResponse);
}
else{
httpResponse.sendRedirect(httpRequest.getContextPath()+"/login.jsp");
}
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
passUrl = arg0.getInitParameter("passUrl");
}
}
标签：getc code public over end ext 配置 color ini
原文地址：https://www.cnblogs.com/ITDreamer/p/9647981.html
