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UploadBean源代码

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

import Java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.*;

public class UploadBean {

ServletRequest request;

ServletInputStream input;

String objectDir="c:/upload/";

private int m_currentIndex;

private int MAX_FILE_SIZE=50*1024*1024;

private byte[] m_binaries;

private String m_boundary;

private int contentLength;

private String fileName="";

public UploadBean(){

super();

m_currentIndex=0;

}

public UploadBean(ServletRequest request){

this();

this.setRequest(request);

}

public void setRequest(ServletRequest request){

if (request!=null){

this.request=request;

try{

this.setInputStream(request.getInputStream());

}catch(IOException ioe){

System.out.println("IOException occurred in com.javacat.jsp.beans.upload.UploadBean.setRequest:"+ioe.getMessage());

}

}

}

public ServletRequest getRequest(){

return this.request;

}

public void setInputStream(ServletInputStream inputStream){

this.input=inputStream;

}

public ServletInputStream getInputStream(){

return this.input;

}

public OutputStream getOutputStream(String filename) throws IOException{

int findex=filename.lastIndexOf("\");

File file=new File(getObjectDir(), filename.substring(findex+1));

this.fileName=filename.substring(findex+1);

return new FileOutputStream(file);

}

public void setObjectDir(String dir){

this.objectDir=dir;

}

public String getObjectDir(){

return this.objectDir;

}

public String getFileName(){

return this.fileName;

}

public int upload() throws IOException,SecurityException{

if(request==null)

return -2;

boolean isFile;

String dataHeader;

String fileName="";

byte[] theBytes;

int countFile=0;

OutputStream output;

contentLength =request.getContentLength();

m_binaries=new byte[contentLength];

int haveRead=0;

while (haveRead<contentLength) {

haveRead+=getInputStream().read(m_binaries, haveRead, contentLength-haveRead);

}

//System.out.println("content= "+new String(m_binaries));

boolean match=false;

m_boundary=new String();

for (; !match && m_currentIndex<contentLength; m_currentIndex++ ){

if(m_binaries[m_currentIndex]==´

´)

match=true;

else

m_boundary=m_boundary+(char)m_binaries[m_currentIndex];

}

if (m_currentIndex==1)

return -1;

m_currentIndex++;

do{

if(m_currentIndex>=contentLength)

break;

dataHeader=getDataHeader();

m_currentIndex=m_currentIndex+2;

isFile=dataHeader.indexOf("filename")>0;

if (isFile) {

fileName="";

if(!getFilePath(dataHeader).equals(""))

fileName=getFileName(getFilePath(dataHeader));

if((fileName==null)(fileName.equals("")))

isFile=false;

}

theBytes=getDataSection();

if(isFile){

if(theBytes.length>this.MAX_FILE_SIZE)

throw new SecurityException("File Size is too large.10M bytes is a limited");

else{

output=getOutputStream(fileName);

output.write(theBytes);

countFile++;

output.close();

}

}

if ((char)m_binaries[m_currentIndex+1]==´-´)

break;

m_currentIndex=m_currentIndex+2;

}while(true);

return countFile;

}

private byte[] getDataSection(){

int searchPosition=m_currentIndex;

int keyPosition=0;

int boundaryLen=m_boundary.length();

int start=m_currentIndex;

int end=m_currentIndex;

do{

if(searchPosition>=contentLength )

break;

if(m_binaries[searchPosition]==(byte)m_boundary.charAt(keyPosition)){

if(keyPosition==boundaryLen-1){

end=searchPosition - boundaryLen - 2;

break;

}

searchPosition++;

keyPosition++;

}

else{

searchPosition++;

keyPosition=0;

}

}while(true);

m_currentIndex=end+boundaryLen+3;

byte[] data=new byte[end-start+1];

for(int i=0; i<data.length; i++)

data[i]=m_binaries[start+i];

return data;

}

private String getDataHeader(){

int start =m_currentIndex;

int end=0;

int len=0;

boolean match=false;

while(!match){

if(m_binaries[m_currentIndex]==´

 
 
 
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