request方法
package com.tencent.request; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/requestDemo1") public class RequestDemo1 extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletRespon se response) throws ServletException, IOException { } protected void doGet(HttpServletRequest request, HttpServletRespons e response) throws ServletException, IOException { String method = request.getMethod(); System.out.println("1:"+method);//GET String path = request.getContextPath(); System.out.println("2:"+path); String servletString = request.getServletPath(); System.out.println("3:"+servletString); String queryString = request.getQueryString(); System.out.println("4:"+queryString); String requestURI = request.getRequestURI(); // /requestDemo1 System.out.println("5:"+requestURI); StringBuffer requestURL = request.getRequestURL();// http://loc alhost:8080/requestDemo1 System.out.println("5:"+requestURL); String protocol = request.getProtocol(); System.out.println("6:"+protocol); String remoteAddr = request.getRemoteAddr(); System.out.println("7:"+remoteAddr); } }
获取请求头信息
//获取请求头名称 Enumerationheader = request.getHeaderNames(); //遍历当前对象 while(header.hasMoreElements()){ String name = header.nextElement(); //根据请求头名称获取相应的请求值 String value = request.getHeader(name); System.out.println(name+"--:--"+value); } //user-agent 返回浏览器的版本 String agent = request.getHeader("user-agent"); System.out.println(agent); if(agent.contains("Chrome")){ System.out.println("表示使用1浏览器"); }else if(agent.contains("Firefox")){ System.out.println("使用2浏览器"); }else{ System.out.println("其他浏览器访问"); } //请求头 referer 表示请求的URL String referer = request.getHeader("referer"); System.out.println(referer); //防止别人进行连接盗用 if(referer != null){//通过连接访问到当前的servlet //判断是不是从我们制定的地址跳转到当前的访问 if(referer.contains("/day01")){ System.out.println("可以进行访问"); }else { System.out.println("访问已经删除..."); } }else{//直接进行访问 System.out.println("直接进行访问 ,通过url直接进行访问..."); }
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