servlet中获得项目绝对路径

servlet中获得项目绝对路径
String filePath=this.getServletConfig().getServletContext().getRealPath("/");

 

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()

 

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("/");

System.out.println("1:"+Thread.currentThread().getContextClassLoader().getResource(""));

System.out.println("2:"+ IdcardClient.class.getClassLoader().getResource(""));

System.out.println("3:"+ ClassLoader.getSystemResource(""));

System.out.println("4:"+ IdcardClient.class.getResource(""));//IdcardClient.class文件所在路径

System.out.println("5:"+ IdcardClient.class.getResource("/"));// Class包所在路径，得到的是URL对象，用url.getPath()获取绝对路径String

System.out.println("6:"+ newFile("/").getAbsolutePath());

System.out.println("7:"+ System.getProperty("user.dir"));

System.out.println("8:"+ System.getProperty("file.encoding"));//获取文件编码