Http header响应

来源：互联网发布：linux nat 配置编辑：程序博客网时间：2024/06/03 20:46

servlet实例：

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Calendar;
import java.util.GregorianCalendar;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* Servlet implementation class Refresh
*/
public class Refresh extends HttpServlet {
private static final long serialVersionUID = 1L;
// 处理 GET 方法请求的方法
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
// 设置刷新自动加载时间为 5 秒
response.setIntHeader("Refresh", 5);

// 设置响应内容类型
response.setContentType("text/html");
response.setCharacterEncoding("utf8");
// 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\">\n";
out.println(docType +
"<html>\n" +
"<head><title>" + title + "</title></head>\n"+
"<body bgcolor=\"#f0f0f0\">\n" +
"<h1 align=\"center\">" + title + "</h1>\n" +
"<p>当前时间是：" + CT + "</p>\n");
}
// 处理 POST 方法请求的方法
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}

}

web.xml配置文件

<servlet>
<description></description>
<display-name>Refresh</display-name>
<servlet-name>Refresh</servlet-name>
<servlet-class>servlet.Refresh</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Refresh</servlet-name>
<url-pattern>/Refresh</url-pattern>
</servlet-mapping>

0 0