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web.xml

AuthorizationFilter

AuthorizationFilter

org.iflysse.training.filter.AuthorizationFilter

excludes

/LoginServlet,/login.jsp,/SendXiaoXiServlet,/files/sendxiaoxi.jsp

AuthorizationFilter

/*

AuthorizationFilter.java

import java.io.IOException;

import java.util.ArrayList;

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;

/*

* Servlet Filter implementation class AuthorizationFilter

*/

public class AuthorizationFilter implements Filter {

private ArrayList excludes = new ArrayList();

@Override

public void init(FilterConfig config) throws ServletException {

String s = config.getInitParameter("excludes");

String[] ary = s.split(",");

for (String a : ary) {

excludes.add(a.trim());

}

}

@Override

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest httpServletRequest = (HttpServletRequest) request;

HttpServletResponse httpServletResponse = (HttpServletResponse) response;

String uri = httpServletRequest.getRequestURI();

for (String exclude : excludes) {

if (uri.endsWith(exclude)) {

request.setCharacterEncoding("utf-8");

response.setCharacterEncoding("utf-8");

chain.doFilter(request, response);

return;

}

}

Object o = httpServletRequest.getSession().getAttribute("userName");

if (o == null) {

String contaxt = httpServletRequest.getContextPath();

httpServletResponse.sendRedirect(contaxt + "/login.jsp");

return;

}

chain.doFilter(request, response);

}

@Override

public void destroy() {

// TODO Auto-generated method stub

}

}