一个文件上传JAVABEAN

王朝java/jsp·作者佚名  2008-05-31
窄屏简体版  字體: |||超大  

package com.upload;

import Java.io.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.ServletInputStream;

import javax.servlet.ServletException;

public class upload{

private static String newline = "\n";

private String uploadDirectory = ".";

private String ContentType = "";

private String CharacterEncoding = "";

private String getFileName(String s){

int i = s.lastIndexOf("\\");

if(i < 0 // i >= s.length() - 1){

i = s.lastIndexOf("/");

if(i < 0 // i >= s.length() - 1)

return s;

}

return s.substring(i + 1);

}

public void setUploadDirectory(String s){

uploadDirectory = s;

}

public void setContentType(String s){

ContentType = s;

int j;

if((j = ContentType.indexOf("boundary=")) != -1){

ContentType = ContentType.substring(j + 9);

ContentType = "--" + ContentType;

}

}

public void setCharacterEncoding(String s){

CharacterEncoding = s;

}

public void uploadFile( HttpServletRequest req) throws ServletException, IOException{

setCharacterEncoding(req.getCharacterEncoding());

setContentType(req.getContentType());

uploadFile(req.getInputStream());

}

public void uploadFile( ServletInputStream servletinputstream) throws ServletException, IOException{

String s5 = null;

String filename = null;

byte Linebyte[] = new byte[4096];

byte outLinebyte[] = new byte[4096];

int ai[] = new int[1];

int ai1[] = new int[1];

String line;

//得到文件名

while((line = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){

int i = line.indexOf("filename=");

if(i >= 0){

line = line.substring(i + 10);

if((i = line.indexOf("\"")) > 0)

line = line.substring(0, i);

break;

}

}

filename = line;

if(filename != null && !filename.equals("\"")){

filename = getFileName(filename);

String sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding);

if(sContentType.indexOf("Content-Type") >= 0)

readLine(Linebyte, ai, servletinputstream, CharacterEncoding);

//File(String parent, String child)

//Creates a new File instance from a parent pathname string

//and a child pathname string.

File file = new File(uploadDirectory, filename);

//FileOutputStream(File file)

//Creates a file output stream to write to the file represented

//by the specified File object.

FileOutputStream fileoutputstream = new FileOutputStream(file);

while((sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){

if(sContentType.indexOf(ContentType) == 0 && Linebyte[0] == 45)

break;

if(s5 != null){

//write(byte[] b, int off, int len)

//Writes len bytes from the specified byte array starting

//at offset off to this file output stream.

fileoutputstream.write(outLinebyte, 0, ai1[0]);

fileoutputstream.flush();

}

s5 = readLine(outLinebyte, ai1, servletinputstream, CharacterEncoding);

if(s5 == null // s5.indexOf(ContentType) == 0 && outLinebyte[0] == 45)

break;

fileoutputstream.write(Linebyte, 0, ai[0]);

fileoutputstream.flush();

}

byte byte0;

if(newline.length() == 1)

byte0 = 2;

else

byte0 = 1;

if(s5 != null && outLinebyte[0] != 45 && ai1[0] > newline.length() * byte0)

fileoutputstream.write(outLinebyte, 0, ai1[0] - newline.length() * byte0);

if(sContentType != null && Linebyte[0] != 45 && ai[0] > newline.length() * byte0)

fileoutputstream.write(Linebyte, 0, ai[0] - newline.length() * byte0);

fileoutputstream.close();

}

}

private String readLine(byte Linebyte[], int ai[],

ServletInputStream servletinputstream,

String CharacterEncoding){

 
 
 
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