调试中都没出现错误，但运行却出现一个保存文件的对话框，而没出现客户端和服务器端的IP地址及端口号等，请高手指点一下
servlet代码如下
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class OutputInfoServlet extends HttpServlet
{
public void doGet(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException
{
resp.setContentType("text/html,charset=gb2312");//此行必须放在15行之前才能设置响应的字符编码
PrintWriter out=resp.getWriter();
Enumeration headNames=req.getHeaderNames();
out.println(" <html> <head>");
out.println(" <title>Info page </title>");
out.println(" </head>");
out.println(" <body> <center>");
out.println(" <table border=1 align=center>");
out.println("caption>Servlet接受到的HTTp消息报头的信息 </caption>");
out.println(" <tr bgcolor=#999999>");
o
