jsp Request获取url信息的各种方法对比
从Request对象中可以获取各种路径信息,以下例子:
假设请求的页面是index.jsp,项目是WebDemo,则在index.jsp中获取有关request对象的各种路径信息如下
Stringpath=request.getContextPath(); StringbasePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; StringremoteAddress=request.getRemoteAddr(); StringservletPath=request.getServletPath(); StringrealPath=request.getRealPath("/"); StringremoteUser=request.getRemoteUser(); StringrequestURI=request.getRequestURI(); out.println("path:"+path+"<br>"); out.println("basePath:"+basePath+"<br>"); out.println("remoteAddr:"+remoteAddress+"<br>"); out.println("servletPath:"+servletPath+"<br>"); out.println("realPath:"+realPath+"<br>"); out.println("remoteUser:"+remoteUser+"<br>"); out.println("requestURI:"+requestURI+"<br>");
结果:
path:/WebDemo basePath:http://localhost:8683/WebDemo/ remoteAddr:127.0.0.1 servletPath:/index.jsp realPath:D:\apache-tomcat-6.0.13\webapps\WebDemo\ remoteUser:null requestURI:/WebDemo/index.jsp
从上不难看出request各个对应方法所代表的含义
从request获取各种路径总结:
request.getRealPath("url");//虚拟目录映射为实际目录 request.getRealPath("./");//网页所在的目录 request.getRealPath("../");//网页所在目录的上一层目录
假定你的webapplication(web应用)名称为news,你的浏览器中输入请求路径:http://localhost:8080/uploading/load.jsp
request.getContextPath()=>/uploading request.getServletPath()=>/load.jsp request.getRequestURL()=>http://localhost:8080/uploading/load.jsp request.getRealPath("/")=>F:\learn\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\uploading\
现在request.getRealPath("/")这个方法已经不推荐使用了
可以使用
ServletContext.getRealPath(java.lang.String)instead. request.getSession().getServletContext().getRealPath()得到工程文件的实际物理路径,也就是绝对地址
//Returnsthepartofthisrequest'sURLfromtheprotocolnameuptothequerystringinthefirstlineoftheHTTPrequest //eg./manage/editExam.domethod=goExamSet&type=U Stringurl=request.getRequestURI(); //ThereturnedURLcontainsaprotocol,servername,portnumber,andserverpath,butitdoesnotincludequerystringparameters //eg.http://127.0.0.1:8080/manage/editExam.domethod=goExamSet&type=U StringBufferurl_buffer=request.getRequestURL();
HttpServletRequest的这两种方法都只能得到不包含参数的请求url,区别如下:
1前者返回相对路径,后者返回完整路径
2前者返回string,后者返回stringbuffer
得到完整请求url可以通过如下方法,getQueryString()得到的是url后面的参数串,和前者相加就是带参数的请求路径了
StringqueryString=request.getQueryString(); ringfullPath=url+queryString;//或者是url_buffer.toString()+queryString;
以上就是小编为大家带来的jspRequest获取url信息的各种方法对比的全部内容了,希望对大家有所帮助,多多支持毛票票~