获取请求头信息
package servletdemo; import java.io.IOException; import java.util.Enumeration; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class HeaderSerlvet */ @WebServlet("/HeaderSerlvet") public class HeaderSerlvet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public HeaderSerlvet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub Enumeration<String> strEnum=request.getHeaderNames(); while (strEnum.hasMoreElements()) { String str =strEnum.nextElement(); String headervalue=request.getHeader(str); System.out.println(str+":"+headervalue); } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } }
设置响应头信息
有很多设置响应头的方法，在这里举两个例子，setContentType和setIntHeader，其他的可以自己看API
package servletdemo; import java.io.IOException; import java.io.PrintWriter; import java.util.Calendar; import java.util.GregorianCalendar; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class ResponseHeaderServlet */ @WebServlet("/ResponseHeaderServlet") public class ResponseHeaderServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public ResponseHeaderServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub // 设置刷新自动加载时间为 5 秒 response.setIntHeader("Refresh", 1); // 设置响应内容类型 response.setContentType("text/html"); // Get current time Calendar calendar = new GregorianCalendar(); String am_pm; int hour = calendar.get(Calendar.HOUR); int minute = calendar.get(Calendar.MINUTE); int second = calendar.get(Calendar.SECOND); if(calendar.get(Calendar.AM_PM) == 0) am_pm = "AM"; else am_pm = "PM"; String CT = hour+":"+ minute +":"+ second +" "+ am_pm; PrintWriter out = response.getWriter(); String title = "自动刷新 Header 设置"; String docType = "<!doctype html public "-//w3c//dtd html 4.0 " + "transitional//en"> "; out.println(docType + "<html> " + "<head><title>" + title + "</title></head> "+ "<body bgcolor="#f0f0f0"> " + "<h1 align="center">" + title + "</h1> " + "<p>当前时间是：" + CT + "</p> "); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } }
呵呵，乱码了，不好意思