ResquestInfoServlet类通过访问HttpServletRequest对象的各种方法来读取HTTP请求中的特定信息，并且把它们写入到HTML中
ResquestInfoServlet.java
|
package com.demo.servlet;
import com.sun.xml.internal.ws.policy.privateutil.PolicyUtils;
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.PrintWriter;
import java.util.Enumeration;
/**
* Created by 谭雪娇 on 2017/4/5.
*/
public class RequestInfoServlet extends HttpServlet {
/*响应客户请求*/
public void doGet(HttpServletRequest request, HttpServletResponse response)throws IOException,ServletException {
//设置HTTP响应的正文的类型
response.setContentType("text/html;charset=GB2312");
/*输出html文档*/
PrintWriter out=response.getWriter();
out.println("<html><head><title>RequestInfo</title></head>");
out.println("<body>");
out.println("<br>LocalAddr:"+request.getLocalAddr());
out.println("<br>LocalName:"+request.getLocalName());
out.println("<br>LocalPort:"+request.getLocalPort());
out.println("<br>Protocol:"+request.getProtocol());
out.println("<br>RemoteAddr:"+request.getRemoteAddr());
out.println("<br>RemoteHost:"+request.getRemoteHost());
out.println("<br>RemotePort:"+request.getRemotePort());
out.println("<br>Method:"+request.getMethod());
out.println("<br>URI:"+request.getRequestURI());
out.println("<br>ContextPath:"+request.getContextPath());
out.println("<br>QueryString:"+request.getQueryString());
/*打印HTTP请求头*/
out.println("<br>***打印HTTP请求头***");
Enumeration eu=request.getHeaderNames();
while(eu.hasMoreElements()){
String headerName=(String)eu.nextElement();
out.println("<br>"+headerName+":"+request.getHeader(headerName));
}
out.println("<br>***打印请求头结束***<br>");
out.println("<br>username :"+request.getParameter("username"));
out.println("</body></html>");
//关闭输入流
out.close();
}
}
|
web.xml
|
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>com.demo.servlet.RequestInfoServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/info</url-pattern>
</servlet-mapping>
|
ResquestInfoServlet生成的HTML页面
