Java编程

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Java

Servlet2.java~3~：源码内容

							package filter5;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Servlet2 extends HttpServlet implements Filter {
  private FilterConfig filterConfig;
  //Handle the passed-in FilterConfig
  public void init(FilterConfig filterConfig) {
    this.filterConfig = filterConfig;
  }
  //Process the request/response pair
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) {
    try{
    String password = ((HttpServletRequest) request).getParameter("password");
           if(password.equals("cwj")) {
               filterChain.doFilter(request, response);
           } else {
               response.setContentType("text/html");
               PrintWriter out = response.getWriter();
               out.println("<HTML>");
               out.println("<HEAD>");
               out.println("<TITLE>");
               out.println("Incorrect Password");
               out.println("</TITLE>");
               out.println("</HEAD>");
               out.println("<BODY>");
               out.println("<H1>Incorrect Password</H1>");
               out.println("Sorry, that password was incorrect.");
               out.println("</BODY>");
               out.println("</HTML>");
           }
       }
    catch(ServletException sx) {
      filterConfig.getServletContext().log(sx.getMessage());
    }
    catch(IOException iox) {
      filterConfig.getServletContext().log(iox.getMessage());
    }
  }
  //Clean up resources
  public void destroy() {
  }
}

						