在servlet中获得http请求头，servlethttp请求头,package cn.o

在servlet中获得http请求头，servlethttp请求头,package cn.o

package cn.outofmemory.snippets.enterprise;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class GetRequestHeaderInServlet extends HttpServlet {    private static final long serialVersionUID = -2128122335811219481L;    public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {        handleRequest(req, res);    }    public void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException {        handleRequest(req, res);    }    public void handleRequest(HttpServletRequest req, HttpServletResponse res) throws IOException {        PrintWriter out = res.getWriter();        res.setContentType("text/plain");        String headerName = "user-agent";        String headerValue = req.getHeader(headerName);        out.write(headerName);        out.write(" = ");        out.write(headerValue);        out.write("\n");        out.close();    }}

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"  version="2.5">    <display-name>JCG Snippets Web Project</display-name>    <servlet>        <servlet-name>JCG Snippets Application</servlet-name>        <servlet-class>cn.outofmemory.snippets.enterprise.GetRequestHeaderInServlet</servlet-class>    </servlet>    <servlet-mapping>        <servlet-name>JCG Snippets Application</servlet-name>        <url-pattern>/jcgservlet</url-pattern>    </servlet-mapping></web-app>

URL:

http://myhost:8080/jcgsnippets/jcgservlet

输出：

user-agent = Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0