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  • http所有请求头在Console中打印

    1.目标:将http中的请求头全部打印在Console中

    2.基本语句

            //1.获得指定的头
            String header = response.getHeader("User-Agert");
            System.out.println(header);
            
            //2.获得所有头的名称
            Enumeration<String> headerNames = request.getHeaderNames();
            while(headerNames.hasMoreElements()) {//判断是否还有下一个元素
                String nextElement = headerNames.nextElement();//获取headerNames集合中的请求头
                String header2 = request.getHeader(nextElement);//通过请求头得到请求内容
                System.out.println(nextElement+":"+header2);

     3.运行结果

    4.完整代码

    package com.hdh.requesd;
    
    import java.io.IOException;
    import java.util.Enumeration;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class requestHead extends HttpServlet {
        protected void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            // 1.获得指定的头
            String header = response.getHeader("User-Agert");
            System.out.println(header);
    
            // 2.获得所有头的名称
            Enumeration<String> headerNames = request.getHeaderNames();
            while (headerNames.hasMoreElements()) {// 判断是否还有下一个元素
                String nextElement = headerNames.nextElement();// 获取headerNames集合中的请求头
                String header2 = request.getHeader(nextElement);// 通过请求头得到请求内容
                System.out.println(nextElement + ":" + header2);
    
            }
    
        }
    
        protected void doPost(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            doGet(request, response);
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/asndxj/p/9822778.html
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