jsp.txt

一份java上传下载的源码加类的说明 值得学习

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");