Java Web中跟path相关的21种情况

请求地址为http://192.168.1.4:8080/07_servlet/parameterServlet?username=long&password=123

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("RequestURL:"+req.getRequestURL());
        System.out.println("RequestURI:"+req.getRequestURI());
        System.out.println("ContextPath:"+req.getContextPath());
        System.out.println("ContextPath:"+req.getServletContext().getContextPath());
        System.out.println("ServletPath:"+req.getServletPath());
        System.out.println("QueryString:"+req.getQueryString());
        System.out.println("Scheme:"+req.getScheme());
        System.out.println("Protocol:"+req.getProtocol());
        System.out.println("ServerName:"+req.getServerName());
        System.out.println("ServerPort:"+req.getServerPort());
        System.out.println("RealPath:"+req.getRealPath("/"));
        System.out.println("RealPath:"+req.getServletContext().getRealPath("/"));
        System.out.println("RemoteHost:"+req.getRemoteHost());
        System.out.println("RemoteAddr:"+req.getRemoteAddr());
        System.out.println("RemotePort:"+req.getRemotePort());
        System.out.println("LocalName:"+req.getLocalName());
        System.out.println("LocalAddr:"+req.getLocalAddr());
        System.out.println("LocalPort:"+req.getLocalPort());
    }

结果：

RequestURL:http://192.168.1.4:8080/07_servlet/parameterServlet
RequestURI:/07_servlet/parameterServlet
ContextPath:/07_servlet
ContextPath:/07_servlet
ServletPath:/parameterServlet
QueryString:username=long&password=123
Scheme:http
Protocol:HTTP/1.1
ServerName:192.168.1.4
ServerPort:8080
RealPath:D:\code-library\JavaWeb\out\artifacts\07_servlet_war_exploded\
RealPath:D:\code-library\JavaWeb\out\artifacts\07_servlet_war_exploded\
RemoteHost:192.168.1.4
RemoteAddr:192.168.1.4
RemotePort:58388
LocalName:DESKTOP-HJQ03GQ
LocalAddr:192.168.1.4
LocalPort:8080

请求地址为http://192.168.1.4:8080/07_servlet/parameterServlet/pathinfo?username=long&password=123

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       System.out.println("PathInfo:"+req.getPathInfo());
       System.out.println("PathTranslated:"+req.getPathTranslated());
       System.out.println("ServletPath:"+req.getServletPath());
    }

结果：

PathInfo:/pathinfo
PathTranslated:D:\code-library\JavaWeb\out\artifacts\07_servlet_war_exploded\pathinfo
ServletPath:/parameterServlet

 

request.getHeader("Referer")； 服务器询问此请求是从哪个页面链接过来的 防止非法请求 如盗链，如未登录 统计流量 如百度 如广告链接 注意 通过window.open或设置location无效
引申：Referrer-Policy <meta name="referrer" content="origin-when-crossorigin">