java代码
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.Writer;
import java.util.Date;
//返回一个页面，每秒钟刷新一次
public class ServletDemo4 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html; charset=utf-8");
resp.setIntHeader("Refresh",1);
//返回的页面中，填写到当前的时间
//获取时间
///System.currentTimeMillis(); new Calender()
Date date = new Date();
Writer writer = resp.getWriter();
writer.write("<html>");
writer.write(date.toString());
writer.write("</html>");
}
}
配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1"
metadata-complete="true">
<servlet>
<servlet-name>ServletDemo4</servlet-name>
<servlet-class>ServletDemo.ServletDemo4</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ServletDemo4</servlet-name>
<url-pattern>/ServletDemo4</url-pattern>
</servlet-mapping>
</web-app>
启动TomCat
运行后这里的时间会自动刷新
