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  项目开发技巧（四）：使用JspSmartupload实现文件上传下载(一):JspSmart之upload组件源码及使用 收藏
新一篇: 项目开发技巧（四）：使用JspSmartupload实现文件上传下载(二):jspSmartUpload上传下载全攻略(ZZ)  | 旧一篇:  把数据库库表记录转成XML
最近在项目开发中用到了jsp上传和下载的功能，所以在网上找了些资料，加上自己的一些总结，希望对大家有所帮助！

一.JspSmart之upload组件源码及使用

JspSmart之upload组件源码主要包括了5个java文件

File.java



Files.java

import java.io.IOException;
import java.util.*;

// Referenced classes of package com.jspsmart.upload:
// File, SmartUpload

public class Files
{

private SmartUpload m_parent;
private Hashtable m_files;
private int m_counter;

Files()
{
m_files = new Hashtable();
m_counter = 0;
}

protected void addFile(File file)
{
if(file == null)
{
throw new IllegalArgumentException("newFile cannot be null.");
} else
{
m_files.put(new Integer(m_counter), file);
m_counter++;
return;
}
}

public File getFile(int i)
{
if(i < 0)
throw new IllegalArgumentException("File's index cannot be a negative value (1210).");
File file = (File)m_files.get(new Integer(i));
if(file == null)
throw new IllegalArgumentException("Files' name is invalid or does not exist (1205).");
else
return file;
}

public int getCount()
{
return m_counter;
}

public long getSize()
throws IOException
{
long l = 0L;
for(int i = 0; i < m_counter; i++)
l += getFile(i).getSize();

return l;
}

public Collection getCollection()
{
return m_files.values();
}

public Enumeration getEnumeration()
{
return m_files.elements();
}
}


Request.java

import java.util.Enumeration;
import java.util.Hashtable;

public class Request
{

private Hashtable m_parameters;
private int m_counter;

Request()
{
m_parameters = new Hashtable();
m_counter = 0;
}

protected void putParameter(String s, String s1)
{
if(s == null)
throw new IllegalArgumentException("The name of an element cannot be null.");
if(m_parameters.containsKey(s))
{
Hashtable hashtable = (Hashtable)m_parameters.get(s);
hashtable.put(new Integer(hashtable.size()), s1);
} else
{
Hashtable hashtable1 = new Hashtable();
hashtable1.put(new Integer(0), s1);
m_parameters.put(s, hashtable1);
m_counter++;
}
}

public String getParameter(String s)
{
if(s == null)
throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
Hashtable hashtable = (Hashtable)m_parameters.get(s);
if(hashtable == null)
return null;
else
return (String)hashtable.get(new Integer(0));
}

public Enumeration getParameterNames()
{
return m_parameters.keys();
}

public String[] getParameterValues(String s)
{
if(s == null)
throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
Hashtable hashtable = (Hashtable)m_parameters.get(s);
if(hashtable == null)
return null;
String as[] = new String[hashtable.size()];
for(int i = 0; i < hashtable.size(); i++)
as[i] = (String)hashtable.get(new Integer(i));

return as;
}
}


SmartUploadException .java

public class SmartUploadException extends Exception
{

SmartUploadException(String s)
{
super(s);
}
}


SmartUpload.java

import java.io.*;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;

// Referenced classes of package com.jspsmart.upload:
// Files, Request, SmartUploadException, File

public class SmartUpload
{

protected byte m_binArray[];
protected HttpServletRequest m_request;
protected HttpServletResponse m_response;
protected ServletContext m_application;
private int m_totalBytes;
private int m_currentIndex;
private int m_startData;
private int m_endData;
private String m_boundary;
private long m_totalMaxFileSize;
private long m_maxFileSize;
private Vector m_deniedFilesList;
private Vector m_allowedFilesList;
private boolean m_denyPhysicalPath;
private boolean m_forcePhysicalPath;
private String m_contentDisposition;
public static final int SAVE_AUTO = 0;
public static final int SAVE_VIRTUAL = 1;
public static final int SAVE_PHYSICAL = 2;
private Files m_files;
private Request m_formRequest;

public SmartUpload()
{
m_totalBytes = 0;
m_currentIndex = 0;
m_startData = 0;
m_endData = 0;
m_boundary = new String();
m_totalMaxFileSize = 0L;
m_maxFileSize = 0L;
m_deniedFilesList = new Vector();
m_allowedFilesList = new Vector();
m_denyPhysicalPath = false;
m_forcePhysicalPath = false;
m_contentDisposition = new String();
m_files = new Files();
m_formRequest = new Request();
}

public final void init(ServletConfig servletconfig)
throws ServletException
{
m_application = servletconfig.getServletContext();
}

public void service(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
throws ServletException, IOException
{
m_request = httpservletrequest;
m_response = httpservletresponse;
}

public final void initialize(ServletConfig servletconfig, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
throws ServletException
{
m_application = servletconfig.getServletContext();
m_request = httpservletrequest;
m_response = httpservletresponse;
}

public final void initialize(PageContext pagecontext)
throws ServletException
{
m_application = pagecontext.getServletContext();
m_request = (HttpServletRequest)pagecontext.getRequest();
m_response = (HttpServletResponse)pagecontext.getResponse();
}

public final void initialize(ServletContext servletcontext, HttpSession httpsession, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, JspWriter jspwriter)
throws ServletException
{
m_application = servletcontext;
m_request = httpservletrequest;
m_response = httpservletresponse;
}

public void upload()
throws ServletException, IOException, SmartUploadException
{
int i = 0;
boolean flag = false;
long l = 0L;
boolean flag1 = false;
String s = new String();
String s2 = new String();
String s4 = new String();
String s5 = new String();
String s6 = new String();
String s7 = new String();
String s8 = new String();
String s9 = new String();
String s10 = new String();
boolean flag2 = false;
m_totalBytes = m_request.getContentLength();
m_binArray = new byte[m_totalBytes];
int j;
for(; i < m_totalBytes; i += j)
try
{
m_request.getInputStream();
j = m_request.getInputStream().read(m_binArray, i, m_totalBytes - i);
}
catch(Exception exception)
{
throw new SmartUploadException("Unable to upload.");
}

for(; !flag1 && m_currentIndex < m_totalBytes; m_currentIndex++)
if(m_binArray[m_currentIndex] == 13)
flag1 = true;
else
m_boundary = m_boundary + (char)m_binArray[m_currentIndex];

if(m_currentIndex == 1)
return;
for(m_currentIndex++; m_currentIndex < m_totalBytes; m_currentIndex = m_currentIndex + 2)
{
String s1 = getDataHeader();
m_currentIndex = m_currentIndex + 2;
boolean flag3 = s1.indexOf("filename") > 0;
String s3 = getDataFieldValue(s1, "name");
if(flag3)
{
s6 = getDataFieldValue(s1, "filename");
s4 = getFileName(s6);
s5 = getFileExt(s4);
s7 = getContentType(s1);
s8 = getContentDisp(s1);
s9 = getTypeMIME(s7);
s10 = getSubTypeMIME(s7);
}
getDataSection();
if(flag3 && s4.length() > 0)
{
if(m_deniedFilesList.contains(s5))
throw new SecurityException("The extension of the file is denied to be uploaded (1015).");
if(!m_allowedFilesList.isEmpty() && !m_allowedFilesList.contains(s5))
throw new SecurityException("The extension of the file is not allowed to be uploaded (1010).");
if(m_maxFileSize > 0L && (long)((m_endData - m_startData) + 1) > m_maxFileSize)
throw new SecurityException("Size exceeded for this file : " + s4 + " (1105).");
l += (m_endData - m_startData) + 1;
if(m_totalMaxFileSize > 0L && l > m_totalMaxFileSize)
throw new SecurityException("Total File Size exceeded (1110).");
}
if(flag3)
{
com.facet.jspsmart.upload.File file = new com.facet.jspsmart.upload.File();
file.setParent(this);
file.setFieldName(s3);
file.setFileName(s4);
file.setFileExt(s5);
file.setFilePathName(s6);
file.setIsMissing(s6.length() == 0);
file.setContentType(s7);
file.setContentDisp(s8);
file.setTypeMIME(s9);
file.setSubTypeMIME(s10);
if(s7.indexOf("application/x-macbinary") > 0)
m_startData = m_startData + 128;
file.setSize((m_endData - m_startData) + 1);
file.setStartData(m_startData);
file.setEndData(m_endData);
m_files.addFile(file);
} else
{
String s11 = new String(m_binArray, m_startData, (m_endData - m_startData) + 1);
m_formRequest.putParameter(s3, s11);
}
if((char)m_binArray[m_currentIndex + 1] == '-')
break;
}

}

public int save(String s)
throws ServletException, IOException, SmartUploadException
{
return save(s, 0);
}

public int save(String s, int i)
throws ServletException, IOException, SmartUploadException
{
int j = 0;
if(s == null)
s = m_application.getRealPath("/");
if(s.indexOf("/") != -1)
{
if(s.charAt(s.length() - 1) != '/')
s = s + "/";
} else
if(s.charAt(s.length() - 1) != '\\')
s = s + "\\";
for(int k = 0; k < m_files.getCount(); k++)
if(!m_files.getFile(k).isMissing())
{
m_files.getFile(k).saveAs(s + m_files.getFile(k).getFileName(), i);
j++;
}

return j;
}

public int getSize()
{
return m_totalBytes;
}

public byte getBinaryData(int i)
{
byte byte0;
try
{
byte0 = m_binArray[i];
}
catch(Exception exception)
{
throw new ArrayIndexOutOfBoundsException("Index out of range (1005).");
}
return byte0;
}

public Files getFiles()
{
return m_files;
}

public Request getRequest()
{
return m_formRequest;
}

public void downloadFile(String s)
throws ServletException, IOException, SmartUploadException
{
downloadFile(s, null, null);
}

public void downloadFile(String s, String s1)
throws ServletException, IOException, SmartUploadException, SmartUploadException
{
downloadFile(s, s1, null);
}

public void downloadFile(String s, String s1, String s2)
throws ServletException, IOException, SmartUploadException
{
downloadFile(s, s1, s2, 65000);
}

public void downloadFile(String s, String s1, String s2, int i)
throws ServletException, IOException, SmartUploadException
{
if(s == null)
throw new IllegalArgumentException("File '" + s + "' not found (1040).");
if(s.equals(""))
throw new IllegalArgumentException("File '" + s + "' not found (1040).");
if(!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is denied (1035).");
if(isVirtual(s))
s = m_application.getRealPath(s);
java.io.File file = new java.io.File(s);
FileInputStream fileinputstream = new FileInputStream(file);
long l = file.length();
boolean flag = false;
int k = 0;
byte abyte0[] = new byte[i];
if(s1 == null)
m_response.setContentType("application/x-msdownload");
else
if(s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength((int)l);
m_contentDisposition = m_contentDisposition != null ? m_contentDisposition : "attachment;";
if(s2 == null)
m_response.setHeader("Content-Disposition", m_contentDisposition + " filename=" + getFileName(s));
else
if(s2.length() == 0)
m_response.setHeader("Content-Disposition", m_contentDisposition);
else
m_response.setHeader("Content-Disposition", m_contentDisposition + " filename=" + s2);
while((long)k < l)
{
int j = fileinputstream.read(abyte0, 0, i);
k += j;
m_response.getOutputStream().write(abyte0, 0, j);
}
fileinputstream.close();
}

public void downloadField(ResultSet resultset, String s, String s1, String s2)
throws ServletException, IOException, SQLException
{
if(resultset == null)
throw new IllegalArgumentException("The RecordSet cannot be null (1045).");
if(s == null)
throw new IllegalArgumentException("The columnName cannot be null (1050).");
if(s.length() == 0)
throw new IllegalArgumentException("The columnName cannot be empty (1055).");
byte abyte0[] = resultset.getBytes(s);
if(s1 == null)
m_response.setContentType("application/x-msdownload");
else
if(s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength(abyte0.length);
if(s2 == null)
m_response.setHeader("Content-Disposition", "attachment;");
else
if(s2.length() == 0)
m_response.setHeader("Content-Disposition", "attachment;");
else
m_response.setHeader("Content-Disposition", "attachment; filename=" + s2);
m_response.getOutputStream().write(abyte0, 0, abyte0.length);
}

public void fieldToFile(ResultSet resultset, String s, String s1)
throws ServletException, IOException, SmartUploadException, SQLException
{
try
{
if(m_application.getRealPath(s1) != null)
s1 = m_application.getRealPath(s1);
InputStream inputstream = resultset.getBinaryStream(s);
FileOutputStream fileoutputstream = new FileOutputStream(s1);
int i;
while((i = inputstream.read()) != -1)
fileoutputstream.write(i);
fileoutputstream.close();
}
catch(Exception exception)
{
throw new SmartUploadException("Unable to save file from the DataBase (1020).");
}
}

private String getDataFieldValue(String s, String s1)
{
String s2 = new String();
String s3 = new String();
int i = 0;
boolean flag = false;
boolean flag1 = false;
boolean flag2 = false;
s2 = s1 + "=" + '"';
i = s.indexOf(s2);
if(i > 0)
{
int j = i + s2.length();
int k = j;
s2 = "\"";
int l = s.indexOf(s2, j);
if(k > 0 && l > 0)
s3 = s.substring(k, l);
}
return s3;
}

private String getFileExt(String s)
{
String s1 = new String();
int i = 0;
int j = 0;
if(s == null)
return null;
i = s.lastIndexOf(46) + 1;
j = s.length();
s1 = s.substring(i, j);
if(s.lastIndexOf(46) > 0)
return s1;
else
return "";
}

private String getContentType(String s)
{
String s1 = new String();
String s2 = new String();
int i = 0;
boolean flag = false;
s1 = "Content-Type:";
i = s.indexOf(s1) + s1.length();
if(i != -1)
{
int j = s.length();
s2 = s.substring(i, j);
}
return s2;
}

private String getTypeMIME(String s)
{
String s1 = new String();
int i = 0;
i = s.indexOf("/");
if(i != -1)
return s.substring(1, i);
else
return s;
}

private String getSubTypeMIME(String s)
{
String s1 = new String();
int i = 0;
boolean flag = false;
i = s.indexOf("/") + 1;
if(i != -1)
{
int j = s.length();
return s.substring(i, j);
} else
{
return s;
}
}

private String getContentDisp(String s)
{
String s1 = new String();
int i = 0;
int j = 0;
i = s.indexOf(":") + 1;
j = s.indexOf(";");
s1 = s.substring(i, j);
return s1;
}

private void getDataSection()
{
boolean flag = false;
String s = new String();
int i = m_currentIndex;
int j = 0;
int k = m_boundary.length();
m_startData = m_currentIndex;
m_endData = 0;
while(i < m_totalBytes)
if(m_binArray[i] == (byte)m_boundary.charAt(j))
{
if(j == k - 1)
{
m_endData = ((i - k) + 1) - 3;
break;
}
i++;
j++;
} else
{
i++;
j = 0;
}
m_currentIndex = m_endData + k + 3;
}

private String getDataHeader()
{
int i = m_currentIndex;
int j = 0;
boolean flag = false;
for(boolean flag1 = false; !flag1;)
if(m_binArray[m_currentIndex] == 13 && m_binArray[m_currentIndex + 2] == 13)
{
flag1 = true;
j = m_currentIndex - 1;
m_currentIndex = m_currentIndex + 2;
} else
{
m_currentIndex++;
}

String s = new String(m_binArray, i, (j - i) + 1);
return s;
}

private String getFileName(String s)
{
String s1 = new String();
String s2 = new String();
int i = 0;
boolean flag = false;
boolean flag1 = false;
boolean flag2 = false;
i = s.lastIndexOf(47);
if(i != -1)
return s.substring(i + 1, s.length());
i = s.lastIndexOf(92);
if(i != -1)
return s.substring(i + 1, s.length());
else
return s;
}

public void setDeniedFilesList(String s)
throws ServletException, IOException, SQLException
{
String s1 = "";
if(s != null)
{
String s2 = "";
for(int i = 0; i < s.length(); i++)
if(s.charAt(i) == ',')
{
if(!m_deniedFilesList.contains(s2))
m_deniedFilesList.addElement(s2);
s2 = "";
} else
{
s2 = s2 + s.charAt(i);
}

if(s2 != "")
m_deniedFilesList.addElement(s2);
} else
{
m_deniedFilesList = null;
}
}

public void setAllowedFilesList(String s)
{
String s1 = "";
if(s != null)
{
String s2 = "";
for(int i = 0; i < s.length(); i++)
if(s.charAt(i) == ',')
{
if(!m_allowedFilesList.contains(s2))
m_allowedFilesList.addElement(s2);
s2 = "";
} else
{
s2 = s2 + s.charAt(i);
}

if(s2 != "")
m_allowedFilesList.addElement(s2);
} else
{
m_allowedFilesList = null;
}
}

public void setDenyPhysicalPath(boolean flag)
{
m_denyPhysicalPath = flag;
}

public void setForcePhysicalPath(boolean flag)
{
m_forcePhysicalPath = flag;
}

public void setContentDisposition(String s)
{
m_contentDisposition = s;
}

public void setTotalMaxFileSize(long l)
{
m_totalMaxFileSize = l;
}

public void setMaxFileSize(long l)
{
m_maxFileSize = l;
}

protected String getPhysicalPath(String s, int i)
throws IOException
{
String s1 = new String();
String s2 = new String();
String s3 = new String();
boolean flag = false;
s3 = System.getProperty("file.separator");
if(s == null)
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(s.equals(""))
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(s.lastIndexOf("\\") >= 0)
{
s1 = s.substring(0, s.lastIndexOf("\\"));
s2 = s.substring(s.lastIndexOf("\\") + 1);
}
if(s.lastIndexOf("/") >= 0)
{
s1 = s.substring(0, s.lastIndexOf("/"));
s2 = s.substring(s.lastIndexOf("/") + 1);
}
s1 = s1.length() != 0 ? s1 : "/";
java.io.File file = new java.io.File(s1);
if(file.exists())
flag = true;
if(i == 0)
{
if(isVirtual(s1))
{
s1 = m_application.getRealPath(s1);
if(s1.endsWith(s3))
s1 = s1 + s2;
else
s1 = s1 + s3 + s2;
return s1;
}
if(flag)
{
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return s;
} else
{
throw new IllegalArgumentException("This path does not exist (1135).");
}
}
if(i == 1)
{
if(isVirtual(s1))
{
s1 = m_application.getRealPath(s1);
if(s1.endsWith(s3))
s1 = s1 + s2;
else
s1 = s1 + s3 + s2;
return s1;
}
if(flag)
throw new IllegalArgumentException("The path is not a virtual path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
}
if(i == 2)
{
if(flag)
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return s;
if(isVirtual(s1))
throw new IllegalArgumentException("The path is not a physical path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
} else
{
return null;
}
}

public void uploadInFile(String s)
throws IOException, SmartUploadException
{
int i = 0;
int j = 0;
boolean flag = false;
if(s == null)
throw new IllegalArgumentException("There is no specified destination file (1025).");
if(s.length() == 0)
throw new IllegalArgumentException("There is no specified destination file (1025).");
if(!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is denied (1035).");
i = m_request.getContentLength();
m_binArray = new byte[i];
int k;
for(; j < i; j += k)
try
{
k = m_request.getInputStream().read(m_binArray, j, i - j);
}
catch(Exception exception)
{
throw new SmartUploadException("Unable to upload.");
}

if(isVirtual(s))
s = m_application.getRealPath(s);
try
{
java.io.File file = new java.io.File(s);
FileOutputStream fileoutputstream = new FileOutputStream(file);
fileoutputstream.write(m_binArray);
fileoutputstream.close();
}
catch(Exception exception1)
{
throw new SmartUploadException("The Form cannot be saved in the specified file (1030).");
}
}

private boolean isVirtual(String s)
{
if(m_application.getRealPath(s) != null)
{
java.io.File file = new java.io.File(m_application.getRealPath(s));
return file.exists();
} else
{
return false;
}
}
}


jspsmart的使用

上传

// 新建一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 上传初始化
su.initialize(pageContext);
// 限制每个上传文件的最大长度。
su.setMaxFileSize(10000);
// 限制总上传数据的长度。
su.setTotalMaxFileSize(20000);
// 设定允许上传的文件（通过扩展名限制）,仅允许doc,txt文件。
su.setAllowedFilesList("doc,txt");
// 设定禁止上传的文件（通过扩展名限制）,禁止上传带有exe,bat,
//jsp,htm,html扩展名的文件和没有扩展名的文件。
su.setDeniedFilesList("exe,bat,jsp,htm,html,,");
// 上传文件
su.upload();
// 将上传文件全部保存到指定目录
int count = su.save("/upload");


下载

// 新建一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 初始化
su.initialize(pageContext);
// 设定contentDisposition为null以禁止浏览器自动打开文件，
//保证点击链接后是下载文件。若不设定，则下载的文件扩展名为
//doc时，浏览器将自动用word打开它。扩展名为pdf时，
//浏览器将用acrobat打开。
su.setContentDisposition(null);
// 下载文件
su.downloadFile("/upload/test.doc");



import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;

// Referenced classes of package com.jspsmart.upload:
// SmartUploadException, SmartUpload

public class File
{

private SmartUpload m_parent;
private int m_startData;
private int m_endData;
private int m_size;
private String m_fieldname;
private String m_filename;
private String m_fileExt;
private String m_filePathName;
private String m_contentType;
private String m_contentDisp;
private String m_typeMime;
private String m_subTypeMime;
private String m_contentString;
private boolean m_isMissing;
public static final int SAVEAS_AUTO = 0;
public static final int SAVEAS_VIRTUAL = 1;
public static final int SAVEAS_PHYSICAL = 2;

File()
{
m_startData = 0;
m_endData = 0;
m_size = 0;
m_fieldname = new String();
m_filename = new String();
m_fileExt = new String();
m_filePathName = new String();
m_contentType = new String();
m_contentDisp = new String();
m_typeMime = new String();
m_subTypeMime = new String();
m_contentString = new String();
m_isMissing = true;
}

public void saveAs(String s)
throws IOException, SmartUploadException
{
saveAs(s, 0);
}

public void saveAs(String s, int i)
throws IOException, SmartUploadException
{
String s1 = new String();
s1 = m_parent.getPhysicalPath(s, i);
if(s1 == null)
throw new IllegalArgumentException("There is no specified destination file (1140).");
try
{
java.io.File file = new java.io.File(s1);
FileOutputStream fileoutputstream = new FileOutputStream(file);
fileoutputstream.write(m_parent.m_binArray, m_startData, m_size);
fileoutputstream.close();
}
catch(IOException ioexception)
{
throw new SmartUploadException("File can't be saved (1120).");
}
}

public void fileToField(ResultSet resultset, String s)
throws ServletException, IOException, SmartUploadException, SQLException
{
long l = 0L;
int i = 0x10000;
int j = 0;
int k = m_startData;
if(resultset == null)
throw new IllegalArgumentException("The RecordSet cannot be null (1145).");
if(s == null)
throw new IllegalArgumentException("The columnName cannot be null (1150).");
if(s.length() == 0)
throw new IllegalArgumentException("The columnName cannot be empty (1155).");
l = BigInteger.valueOf(m_size).divide(BigInteger.valueOf(i)).longValue();
j = BigInteger.valueOf(m_size).mod(BigInteger.valueOf(i)).intValue();
try
{
for(int i1 = 1; (long)i1 < l; i1++)
{
resultset.updateBinaryStream(s, new ByteArrayInputStream(m_parent.m_binArray, k, i), i);
k = k != 0 ? k : 1;
k = i1 * i + m_startData;
}

if(j > 0)
resultset.updateBinaryStream(s, new ByteArrayInputStream(m_parent.m_binArray, k, j), j);
}
catch(SQLException sqlexception)
{
byte abyte0[] = new byte[m_size];
System.arraycopy(m_parent.m_binArray, m_startData, abyte0, 0, m_size);
resultset.updateBytes(s, abyte0);
}
catch(Exception exception)
{
throw new SmartUploadException("Unable to save file in the DataBase (1130).");
}
}

public boolean isMissing()
{
return m_isMissing;
}

public String getFieldName()
{
return m_fieldname;
}

public String getFileName()
{
return m_filename;
}

public String getFilePathName()
{
return m_filePathName;
}

public String getFileExt()
{
return m_fileExt;
}

public String getContentType()
{
return m_contentType;
}

public String getContentDisp()
{
return m_contentDisp;
}

public String getContentString()
{
String s = new String(m_parent.m_binArray, m_startData, m_size);
return s;
}

public String getTypeMIME()
throws IOException
{
return m_typeMime;
}

public String getSubTypeMIME()
{
return m_subTypeMime;
}

public int getSize()
{
return m_size;
}

protected int getStartData()
{
return m_startData;
}

protected int getEndData()
{
return m_endData;
}

protected void setParent(SmartUpload smartupload)
{
m_parent = smartupload;
}

protected void setStartData(int i)
{
m_startData = i;
}

protected void setEndData(int i)
{
m_endData = i;
}

protected void setSize(int i)
{
m_size = i;
}

protected void setIsMissing(boolean flag)
{
m_isMissing = flag;
}

protected void setFieldName(String s)
{
m_fieldname = s;
}

protected void setFileName(String s)
{
m_filename = s;
}

protected void setFilePathName(String s)
{
m_filePathName = s;
}

protected void setFileExt(String s)
{
m_fileExt = s;
}

protected void setContentType(String s)
{
m_contentType = s;
}

protected void setContentDisp(String s)
{
m_contentDisp = s;
}

protected void setTypeMIME(String s)
{
m_typeMime = s;
}

protected void setSubTypeMIME(String s)
{
m_subTypeMime = s;
}

public byte getBinaryData(int i)
{
if(m_startData + i > m_endData)
throw new ArrayIndexOutOfBoundsException("Index Out of range (1115).");
if(m_startData + i <= m_endData)
return m_parent.m_binArray[m_startData + i];
else
return 0;
}
}

发表于 @ 2006年11月18日 20:07:00|评论(4)|编辑

新一篇: 项目开发技巧（四）：使用JspSmartupload实现文件上传下载(二):jspSmartUpload上传下载全攻略(ZZ)  | 旧一篇:  把数据库库表记录转成XML评论
#shaoshao 发表于2007-08-22 14:29:32  IP: 124.230.47.*
楼主,你好!看到你这几篇文章真是太高兴了,你能发给我一份 JspSmartupload组件的源代码吗?我的邮箱是:[e-mail]
非常谢谢,很期待你的回复啊!#shaoshao 发表于2007-08-22 17:13:50  IP: 124.230.35.*
楼主,
你有没有发现下载text文件会出问题啊?
我出这样的错误
getOutputStream() has already been called for this response
不知道你有没有碰到?#shaoshao 发表于2007-08-22 17:27:51  IP: 124.230.35.*
我发现了 不是text文件格式的问题 是有些text文件可以下载 有些text文件下载就出错 excel文件也是一样
都是这个错误getOutputStream() has already been called for this response
是什么原因呢?#daming 发表于2007-12-30 22:17:28  IP: 221.11.20.*

评论

1 楼 yyh84yangtao 2008-09-23  

楼主,你好!看到你这几篇文章真是太高兴了,你能发给我一份 JspSmartupload.zip吗？我的邮箱是[e-mail],谢谢！