Online Book Mall 11--Backend Login Filter-php手册-php.cn

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Online Book Mall 11--Backend Login Filter

Dec 05, 2016 pm 01:26 PM

1.web.xml

&lt;filter&gt;
	&lt;filter-name&gt;AdminLoginFilter&lt;/filter-name&gt;
	&lt;filter-class&gt;cn.itcast.goods.admin.web.filter.AdminLoginFilter&lt;/filter-class&gt;
&lt;/filter&gt;
&lt;filter-mapping&gt;
	&lt;filter-name&gt;AdminLoginFilter&lt;/filter-name&gt;
	&lt;url-pattern&gt;/adminjsps/admin/*&lt;/url-pattern&gt;
	&lt;url-pattern&gt;/admin/*&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;

Copy after login

2.AdminLoginFilter

public void doFilter(ServletRequest request, ServletResponse response,
		FilterChain chain) throws IOException, ServletException {
	HttpServletRequest req = (HttpServletRequest) request;
	Object admin = req.getSession().getAttribute("admin");
	if(admin == null) {
		request.setAttribute("msg", "您还没有登录，不要瞎遛达！");
		request.getRequestDispatcher("/adminjsps/login.jsp").forward(request, response);
	} else {
		chain.doFilter(request, response);
	}
}

Copy after login

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