得到路径

根目录所对应的绝对路径:request.getServletPath();

文件的绝对路径 :request.getSession().getServletContext().getRealPath(request.getRequestURI())

当前web应用的绝对路径 :servletConfig.getServletContext().getRealPath("/");

ServletContext对象获得几种方式：

Javax.servlet.http.HttpSession.getServletContext()

Javax.servlet.jsp.PageContext.getServletContext()

Javax.servlet.ServletConfig.getServletContext()


this.getRequest().getServletPath();///member/projectPublish.action
this.getRealyPath(this.getRequest().getRequestURL().toString());
//E:\software\apache-tomcat-6.0.20\apache-tomcat-6.0.20\webapps\MobileBusiness\http:\localhost:8080\MobileBusiness\member\projectPublish.action

this.getSession().getServletContext().getRealPath(this.getRequest().getRequestURI());
//E:\software\apache-tomcat-6.0.20\apache-tomcat-6.0.20\webapps\MobileBusiness\MobileBusiness\member\projectPublish.action
this.getServletContext().getRealPath("/");
//E:\software\apache-tomcat-6.0.20\apache-tomcat-6.0.20\webapps\MobileBusiness\


新增：

假定你的web application 名称为news,你在浏览器中输入请求路径：

http://localhost:8080/news/main/list.jsp

则执行下面向行代码后打印出如下结果：

1、 System.out.println(request.getContextPath());

打印结果：/news
   2、System.out.println(request.getServletPath());

打印结果：/main/list.jsp
3、 System.out.println(request.getRequestURI());

打印结果：/news/main/list.jsp
4、 System.out.println(request.getRealPath("/"));

打印结果：F:\Tomcat 6.0\webapps\news\test