如何使jap代码更安全

Question

如何使jap代码更安全

Answer 1

struts2中有机制,你可以去看看

Answer 2

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;public class FilterStation extends HttpServlet implements Filter {
    private FilterConfig filterConfig;    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
    }
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain filterChain) throws ServletException,
            IOException {
HttpSession session=((HttpServletRequest)request).getSession();
        response.setCharacterEncoding("gbk");
       if(session.getAttribute("user")==null){
       PrintWriter out=response.getWriter();
       out.print("<script language=javascript>alert('还未登陆!');window.location.href='../index.jsp';</script>");
       }else{
        filterChain.doFilter(request, response);
       }
    }    public void destroy() {
    }
}