效果如下圖：

源代碼如下：

package star.july;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; /*** 獲取Http協議的請求行，請求頭* @author Starjuly**/ public class RequestDemo1 extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {System.out.println("請求行的方法:" + request.getMethod());System.out.println("請求行的URI:" + request.getRequestURI());System.out.println("請求行的URL:" + request.getRequestURL());System.out.println("請求行的版本:" + request.getProtocol());System.out.println("請求頭:"+request.getHeader("User-Agent"));//利用迭代器遍歷所有的請求頭Enumeration names = request.getHeaderNames(); while(names.hasMoreElements()){//獲取請求頭String nextElement = (String)names.nextElement();//獲取每個請求頭的內容String header = request.getHeader(nextElement); System.out.print(nextElement+" : ");System.out.println(header);}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request,response);}}

總結

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