JSP读写磁盘

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"    pageEncoding="ISO-8859-1"%><%@ page import="java.io.*" %><HTML>    <HEAD>        <TITLE>Reading Binary Data</TITLE>    </HEAD>    <BODY>        <H1>Reading Binary Data</H1>        This page reads binary data from a file.        <BR>        Read this data:        <BR>        <BR>        <%            String file = application.getRealPath("/") + "test.dat";                        double data[] = {1.234, 2.345, 3.456, 4.567};            FileOutputStream fileoutputstream = new FileOutputStream(file);            ObjectOutputStream objectStream = new ObjectOutputStream(fileoutputstream );            for (int i = 0; i < data.length; i++) {                objectStream.writeDouble(data[i]);            }            objectStream.close();                                    FileInputStream fileinputstream = new FileInputStream(file);            ObjectInputStream inputobjectStream = new ObjectInputStream(fileinputstream);             for(int i = 0; i < 4; i++){                double d = inputobjectStream.readDouble();                out.println(d);            }            inputobjectStream.close();        %>    </BODY></HTML>

如果是用eclipse，那么,test.dat文件在这里：

D:\workspace130417\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\read_write_file

workspace130417是工作空间，read_write_file是工程名。

原文：http://www.java2s.com/Tutorial/Java/0360__JSP/ReadingBinaryData.htm