usingFile.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <%@page import="java.io.*" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'usingFile.jsp' starting page</title> </head> <body> <!-- String thePath=request.getRealPath("");作用：获取取得你当前运行文件在服务器上的绝对路径 --> <% //path=request.getRealPath(""); //out.println(path); //String pathe=request.getRealPath("/"); //out.print(pathe); %> <br> <% String thePath=request.getRealPath("")+"\file"; out.print(thePath+"<br>"); File dir=new File(thePath); File myFile=new File(thePath,"usingFile.jsp"); File notExitFile=new File(thePath,"file.txt"); out.print("目录"+thePath+"是否存在: "+dir.exists()+"<br><br>"); out.print("文件"+thePath+"\usingFile.jsp是否存在: "+myFile.exists()+"<br><br>"); out.print("文件"+thePath+"\file.txt是否存在: "+notExitFile.exists()+"<br><br>"); out.print("文件"+thePath+"\usingFile.jsp是否可读: "+myFile.canRead()+"<br><br>"); out.print("文件"+thePath+"\usingFile.jsp是否可写: "+myFile.canWrite()+"<br>"); %> </body> </html>