📄 upfile.jsp
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<%@ page contentType="text/html;charset=GBK" language="java" import="java.io.*" errorPage="" %>
<html>
<head>
<title>
文件上传
</title>
<style type="text/css">
<!--
td { font-size: 9pt}
a { color: #000000; text-decoration: none}
a:hover { text-decoration: underline}
.tx { height: 16px; width: 30px; border-color: black black #000000; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 1px; border-left-width: 0px; font-size: 9pt; background-color: #eeeeee; color: #0000FF}
.bt { font-size: 9pt; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; height: 16px; width: 80px; background-color: #eeeeee; cursor: hand}
.tx1 { height: 20px; width: 30px; font-size: 9pt; border: 1px solid; border-color: black black #000000; color: #0000FF}
-->
</style>
</head>
<%
try{
String path=application.getRealPath(request.getRequestURI());
int plength=path.length();
path=path.substring(0,plength-17);
path=path+"/pic";
String tempFileName=(String)session.getId();
File fl=new File(path,tempFileName);
FileOutputStream o=new FileOutputStream(fl);
InputStream in=request.getInputStream();
byte b[]=new byte[1000000];
int n;
while((n=in.read(b))!=-1){
o.write(b,0,n);
}
o.close();
in.close();
RandomAccessFile random=new RandomAccessFile(fl,"r");
int second=1;
String secondLine=null;
while(second<=14){
secondLine=random.readLine();
second++;
}
int position=secondLine.lastIndexOf("\\");
String fileName=secondLine.substring(position+1,secondLine.length()-1);
int length=fileName.length();
boolean err=false;
int jpg=fileName.lastIndexOf(".jpg");
int gif=fileName.lastIndexOf(".gif");
int k=fileName.lastIndexOf(".");
if(jpg>0){if(k!=jpg) err=true;}
else if(gif>0){ if(gif!=k) err=true;}
else{ err=true;
}
if(err==true)
{
random.close();
fl.delete();
out.print("不准传非法文件!");
}else
{
random.seek(0);
long forthEndPosition=0;
int forth=1;
while((n=random.readByte())!=-1&forth<=16){
if(n=='\n'){
forthEndPosition=random.getFilePointer();
forth++;
}
}
File fl2=new File(path,fileName);
RandomAccessFile random2=new RandomAccessFile(fl2,"rw");
random.seek(random.length());
long endPosition=random.getFilePointer();
long mark=endPosition;
int j=1;
while((mark>=0)&(j<=6)){
mark--;
random.seek(mark);
n=random.readByte();
if(n=='\n'){
endPosition=random.getFilePointer();
j++;
}
}
random.seek(forthEndPosition);
long startPoint=random.getFilePointer();
while(startPoint<endPosition-1){
n=random.readByte();
random2.write(n);
startPoint=random.getFilePointer();
}
random2.close();
random.close();
fl.delete();
out.print("<p>文件成功上传!</p>");
out.print("<p>图片名称应存为:"+fileName+"</p>");
}
}
catch(IOException e){
out.print("文件上传失败!");
}
%>
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