jsp编程获取当前目录下的文件和目录及windows盘符的方法-巨人网络通讯

jsp编程获取当前目录下的文件和目录及windows盘符的方法

本文实例讲述了jsp编程获取当前目录下的文件和目录及windows盘符的方法。分享给大家供大家参考，具体如下：

知识点

1 file对象的应用
2 listFiles()方法
3 isDirectory()方法,isFile()方法判断是否为目录或是文件
4转换字符串方法toString

(1)创建一个file对象dir,
然后用listFiles()方法返回当前目录下所有文件

String path=request.getRealPath("/");
File dir=new File(path);
File file[]=dir.listFiles();

(2)循环判断所返回的是否为目录,并显示出来:

%
for(int i=0;ifile.length;i++)
{
  if(file[i].isDirectory())//
  out.print("br>"+file[i].toString());
}
%>

(3)循环判断所返回的是否为目录,并显示出来：

%
for(int i=0;ifile.length;i++)
{
  if(file[i].isFile())
  out.print("br>"+file[i].toString());
}
%>

程序：

%@ page contentType="text/html;charset=GB2312"%>
%@ page import="java.io.*"%>
html>
title>/title>
body>
%
String path=request.getRealPath("/");
File dir=new File(path);
File file[]=dir.listFiles();//用file对象的listFiles()方法返回指定目录下的文件
%>
当前%=path%>br>
目录有:
%
for(int i=0;ifile.length;i++)
{
  if(file[i].isDirectory())
  out.print("br>"+file[i].toString());
}
%>
p>文件有:
%
for(int i=0;ifile.length;i++)
{
  if(file[i].isFile())
  out.print("br>"+file[i].toString());
}
  %>
/body>
/html>

(二)获取windows盘符

%@ page contentType="text/html;charset=GB2312"%>
%@ page import="java.io.*"%>
html>
body>
%
File[] roots=File.listRoots();
for(int i=0;iroots.length;i++)
{
out.print("br>"+roots[i].getPath());
}
%>
/body>
/html>

(三)将两个程序合并

%@ page contentType="text/html;charset=GB2312"%>
%@ page import="java.io.*,java.util.*,java.net.*" %>
%!
private final static int languageNo=0; //语言版本，0 : 中文； 1：英文
String[] strDrivers   = {"驱动器","Drivers"};
String[] strCurrentFolder= {"当前目录","Current Folder"};
%>
html>
body>
%
String path=request.getRealPath("/");
File dir=new File(path);
File file[]=dir.listFiles();//用file对象的listFiles()方法返回指定目录下的文件
StringBuffer sb=new StringBuffer(strDrivers[languageNo] + " : ");
File roots[]=File.listRoots();
for(int i=0;iroots.length;i++)
{
  sb.append(" a href=/"javascript:doForm('','"+roots[i]+"//','','','1','');/">");
  sb.append(roots[i]+"/a>nbsp;");
}
//out.println(sb);
%>
%
//out.print("table border='1' width='100%' bgcolor='#FFFFFF' cellspacing=0 cellpadding=5 bordercolorlight=#000000 bordercolordark=#FFFFFF>tr>td>"+strCurrentFolder[languageNo]+":br>b>"+path+"/td>td>"+sb+"/td>/tr>/table>");
%>
table border='1' width='100%' bgcolor='#FFFFFF' cellspacing=0 cellpadding=5 bordercolorlight=#000000 bordercolordark=#FFFFFF>
tr>
td width='40%'>%=strCurrentFolder[languageNo]%>:br>%=path %>/td>td width='60%'>%=strDrivers[languageNo] %>:%=sb%>/td>/tr>
/table>
table border='1' width='100%' bgcolor='#FFFFFF' cellspacing=0 cellpadding=5 bordercolorlight=#000000 bordercolordark=#FFFFFF>
tr>
td width='40%'>目录有:
%
for(int i=0;ifile.length;i++)
{
  if(file[i].isDirectory())
  out.print("br>"+file[i].toString());
}
%>
/td>
td width='60%'>文件有:
%
for(int i=0;ifile.length;i++)
{
  if(file[i].isFile())
  out.print("br>"+file[i].toString());
}
  %>
/td>
/tr>
/table>
/body>
/html>

我们进一步的优化,实现

%@ page contentType="text/html; charset=GBK" %>
%@page import="java.io.*,java.util.*,java.net.*" %>
head>
style type="text/css">
td,select,input,body{font-size:9pt;}
A { text-decoration: none }
#tablist{
padding: 5px 0;
margin-left: 0;
margin-bottom: 0;
margin-top: 0.1em;
font:9pt;
}
#tablist li{
list-style: none;
display: inline;
margin: 0;
}
#tablist li a{
padding: 3px 0.5em;
margin-left: 3px;
border: 1px solid ;
background: #FFFFFF;
}
#tablist li a:link, #tablist li a:visited{
color: navy;
}
#tablist li a.current{
background: #FFFFFF;
}
#tabcontentcontainer{
width: 100%;
padding: 5px;
border: 1px solid black;
}
.tabcontent{
display:none;
}
/style>
/head>
%!
private final static int languageNo=1; //语言版本，0 : 中文； 1：英文
String[] strCurrentFolder= {"当前目录","Current Folder"};
String[] strDrivers   = {"驱动器","Drivers"};
String[] strFileName   = {"文件名称","File Name"};
String[] strFileSize   = {"文件大小","File Size"};
String[] strLastModified = {"最后修改","Last Modified"};
String[] strFileOperation= {"文件操作","Operations"};
String[] strFileEdit   = {"修改","Edit"};
String[] strFileDown   = {"下载","Download"};
String[] strFileCopy   = {"复制","Move"};
String[] strFileDel   = {"删除","Delete"};
String getDrivers() 
{ 
StringBuffer sb=new StringBuffer(": "); 
File roots[]=File.listRoots(); 
for(int i=0;iroots.length;i++) 
{ 
sb.append("a href='?path="+roots[i]+"'>"); 
sb.append(roots[i]+"/a> nbsp;nbsp;"); 
} 
return sb.toString(); 
}
String formatPath(String p)
{
StringBuffer sb=new StringBuffer();
for (int i = 0; i  p.length(); i++) 
{
  if(p.charAt(i)=='//')
  {
  sb.append("////");
  }
  else
  {
  sb.append(p.charAt(i));
  }
}
return sb.toString();
}
public static String toChinese(String str)
{
  try{
  if(str==null)
  {
   return "";
  }else
  {
   str=new String(str.getBytes("ISO8859_1"),"GBK");
   return str;
  }
  }catch(Exception e)
  {
  return "";
  }
}
%>
%
request.setCharacterEncoding("gb2312");
String strDir =toChinese( request.getParameter("path")); 
if(strDir==null||strDir.length()1)
{
strDir = request.getRealPath("/");
}
StringBuffer sb=new StringBuffer(""); 
StringBuffer sbFile=new StringBuffer(""); 
try 
{
File objFile = new File(strDir); 
File list[] = objFile.listFiles(); 
if(objFile.getAbsolutePath().length()>3) 
{ 
sb.append("tr>td >nbsp;/td>td>a href='?path="+formatPath(objFile.getParentFile
().getAbsolutePath())+"'>"); 
sb.append("To ParentFile/a>br>- - - - /td>/tr>/r/n"); 
} 
for(int i=0;ilist.length;i++) 
{ 
if(list[i].isDirectory()) 
{ 
sb.append("tr>td>nbsp;/td>td>"); 
sb.append("a href='?path="+formatPath(list[i].getAbsolutePath())+"'>"+list[i].getName()+"/a>"); 
sb.append("/td>/tr>");
} 
else 
{ 
String strLen=""; 
String strDT=""; 
long lFile=0; 
lFile=list[i].length();
if(lFile>1000000) 
{ 
lFile=lFile/1000000; 
strLen="" + lFile + " M"; 
} 
else if(lFile>1000) 
{ 
lFile=lFile/1000; 
strLen="" + lFile + " K"; 
} 
else 
{ 
strLen="" + lFile + " Byte"; 
} 
Date dt=new Date(list[i].lastModified()); 
strDT=dt.toLocaleString(); 
sbFile.append("tr>td>"); 
sbFile.append(""+list[i].getName()); 
sbFile.append("/td>td>"); 
sbFile.append(""+strLen); 
sbFile.append("/td>td>"); 
sbFile.append(""+strDT); 
sbFile.append("/td>td>");
sbFile.append(" a href=>");
sbFile.append(strFileEdit[languageNo]+"/a> ");
sbFile.append(" a href=>");
sbFile.append(strFileDown[languageNo]+"/a> ");
sbFile.append(" a href=>");
sbFile.append(strFileCopy[languageNo]+"/a> ");
sbFile.append(" a href=>");
sbFile.append(strFileDel[languageNo]+"/a> ");
sbFile.append("/td>/tr>/r/n"); 
} 
} 
} 
catch(Exception e) 
{ 
out.println("font color=red>error： "+e.toString()+"/font>"); 
} 
%>
table border='1' width='100%' bgcolor='#FFFFFF' cellspacing=0 cellpadding=5 bordercolorlight=#000000 bordercolordark=#FFFFFF>
tr>
td width='20%'>%=strCurrentFolder[languageNo]%>:br>%=strDir %>/td>td width='70%'>%=strDrivers[languageNo] %>%=getDrivers()%>
/td>
/tr>
/table>
table border='1' width='100%' bgcolor='#FFFFFF' cellspacing=0 cellpadding=5 bordercolorlight=#000000 bordercolordark=#FFFFFF>
tr>
td width='20%'valign="top">
table >
tr>td>%=sb%>/td>
/tr>
/table>
/td>
td width='70%'align="center" valign="top">
table width="100%"border="1" cellspacing="1" cellpadding="4" bordercolorlight="#000000" bordercolordark="#FFFFFF">
tr>
td width="26%" align="center">%=strFileName[languageNo] %>/td>
td width="19%" align="center">%=strFileSize[languageNo] %>/td>
td width="29%" align="center">%=strLastModified[languageNo] %>/td>
td width="26%" align="center">%=strFileOperation[languageNo] %>/td>/tr>
tr>td width="25%" align="center">%=sbFile %>/td>/tr>
/table>
/td>
/tr>
/table>

希望本文所述对大家jsp程序设计有所帮助。

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