使用过滤器实现cookie检查参考源码.rar_jsp_saltk8x

package filter; 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.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; public class LoginFilter implements Filter { public void init(FilterConfig config) throws ServletException { } public void destroy() { } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding("gb2312"); HttpServletRequest req = (HttpServletRequest) request; Cookie[] cookies = req.getCookies(); String account = ""; String password = ""; if (cookies != null && cookies.length != 0) { for (int i = 0; i < cookies.length; i++) { System.out.println(cookies[i].getName() + "--" + cookies[i].getValue()); if (cookies[i].getName().equals("account")) { account = cookies[i].getValue(); } if (cookies[i].getName().equals("password")) { password = cookies[i].getValue(); } } } if (!account.equals("") && !(password.equals("")) && account.equals(password)) { req.getRequestDispatcher("/welcome.jsp").forward(request, response); } else { req.getRequestDispatcher("/login.jsp").forward(request, response); } } }