我想获取一个请求信息(发起发为手机)的所有头元素信息,该怎么获取啊?应该不能用servlet 的request.getHeaderNames()方法,因为试验过了,这个方法只能获取一些基本的信息,获不到用户自己加上去的HEADER元素,比如
移动那边发送了手机号的头信息:
response.addHeader("x-up-calling-line-id","1358888888");
在这边用request.getHeaderNames()是获取不到"x-up-calling-line-id"的,用request.getHeader("x-up-calling-line-id")也获取不到,这点有点奇怪,可能移动那边不是这样设置头的。我现在想知道,我可以怎么样获取所有的HEAD信息?各位提提建议好吗?
不过我更关心的是如何向手机用户发送一个 200 OK 的返回。就是HTTP头部的那个200 OK。
请问楼主知道么?
package hall;import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;public class ShowRequestHeaders extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "显示所有请求头";
out.println(ServletUtilities.headWithTitle(title) +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=CENTER>" + title + "</H1>\n" +
"<B>Request Method: </B>" +
request.getMethod() + "<BR>\n" +
"<B>Request URI: </B>" +
request.getRequestURI() + "<BR>\n" +
"<B>Request Protocol: </B>" +
request.getProtocol() + "<BR><BR>\n" +
"<TABLE BORDER=1 ALIGN=CENTER>\n" +
"<TR BGCOLOR=\"#FFAD00\">\n" +
"<TH>Header Name<TH>Header Value");
Enumeration headerNames = request.getHeaderNames();
while(headerNames.hasMoreElements()) {
String headerName = (String)headerNames.nextElement();
out.println("<TR><TD>" + headerName);
out.println(" <TD>" + request.getHeader(headerName));
}
out.println("</TABLE>\n</BODY></HTML>");
}public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
} 不知道有没有用