Java获取服务器网址

StringBuffer url1 = request.getRequestURL();
String tempContextUrl1 = url1.delete(url1.length() - request.getRequestURI().length(), url1.length()).append("/").toString();
System.out.println("------1>"+tempContextUrl1);

StringBuffer url = request.getRequestURL();
String tempContextUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).append(request.getContextPath()).append("/").toString();
System.out.println("------2>"+tempContextUrl);

System.out.println("------3>"+request.getRemoteHost()+request.getContextPath());

System.out.println("-----ServletPath---" + request.getServletPath());
System.out.println("-----ContextPath---" + request.getContextPath());
System.out.println("-----referer---" + request.getHeader("referer"));
System.out.println("-----host---" + request.getHeader("host"));
System.out.println("-----RequestURI---" + request.getRequestURI());
System.out.println("-----RequestURL---" + request.getRequestURL());
System.out.println("-----ServerName---" + request.getServerName());
System.out.println("-----ServerPort---" + request.getServerPort());
String realPath1 = "http://"+ request.getServerName()+ ":"+ request.getServerPort()+ request.getContextPath()+ request.getServletPath().substring(0,request.getServletPath().lastIndexOf("/") + 1);
System.out.println("web URL 路径:" + realPath1);

http://10.5.14.66:8101/f1print/exceltemp/001/BarCodePrint.pdf
------1>http://localhost:8080/
------2>http://localhost:8080/yxlis/
------3>0:0:0:0:0:0:0:1/yxlis
-----ServletPath---/case/LLBarcodePrintSave.jsp
-----ContextPath---/yxlis
-----referer---http://localhost:8080/yxlis/case/LLBarcodePrintMain.jsp
-----host---localhost:8080
-----RequestURI---/yxlis/case/LLBarcodePrintSave.jsp
-----RequestURL---http://localhost:8080/yxlis/case/LLBarcodePrintSave.jsp
-----ServerName---localhost
-----ServerPort---8080
web URL 路径:http://localhost:8080/yxlis/case/