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在Java項目中實現文件上傳的方法？相信很多沒有經驗的人對此束手無策，為此本文總結了問題出現的原因和解決方法，通過這篇文章希望你能解決這個問題。
1.jspsmartupload
這個組件用起來是挺方便的,不過就是只適合小文件上傳,如果大文件上傳的話就不行,查看了一下他的代碼,m_totalBytes = m_request.getContentLength(); m_binArray = new byte[m_totalBytes];居然把整個上傳文件都讀到內存去了,那如果是上傳幾十M的文件,同時幾個用戶上傳,服務器穩掛,不過如果只是上傳5M以內的小文件,這個組件還是挺實用的
下面是源代碼:
File類
/*
* 創建日期 2006-7-29
*
* 更改所生成文件模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
package com.kinstar.issuing.file;
/**
* @author gongyifeng
*
* 更改所生成類型注釋的模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
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 java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
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(){
DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String date = df.format(new Date());
return date+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;
}
}Files類
/*
* 創建日期 2006-7-29
*
* 更改所生成文件模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
package com.kinstar.issuing.file;
/**
* @author gongyifeng
*
* 更改所生成類型注釋的模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
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類
/*
* 創建日期 2006-7-29
*
* 更改所生成文件模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
package com.kinstar.issuing.file;
/**
* @author gongyifeng
*
* 更改所生成類型注釋的模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
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;
}
}SmartUpload類
/*
* 創建日期 2006-7-29
*
* 更改所生成文件模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
package com.kinstar.issuing.file;
/**
* @author gongyifeng
*
* 更改所生成類型注釋的模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
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.kinstar.issuing.file.File file = new com.kinstar.issuing.file.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;
}
}
}SmartUploadException 類
/*
* 創建日期 2006-7-29
*
* 更改所生成文件模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
package com.kinstar.issuing.file;
/**
* @author gongyifeng
*
* 更改所生成類型注釋的模板為
* 窗口 > 首選項 > Java > 代碼生成 > 代碼和注釋
*/
public class SmartUploadException extends Exception
{
SmartUploadException(String s)
{
super(s);
}
}上傳的Servlet
package com.kinstar.issuing.action;
import java.io.IOException;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import java.io.*;
import java.sql.SQLException;
import java.util.*;
import java.text.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.kinstar.issuing.file.File;
import com.kinstar.issuing.file.SmartUpload;
import com.kinstar.issuing.objects.t_user;
import com.kinstar.issuing.operation.UserOperation;
import com.kinstar.issuing.program.programService;
import com.kinstar.issuing.session.SessionGloble;
import com.kinstar.issuing.util.StringUtil;
/**
* @version 1.0
* @author gyf
*/
public class upload2ProgramAction extends HttpServlet{
private ServletConfig config;
/**
* 初始化Servlet
*/
final public void init(ServletConfig config) throws ServletException {
this.config = config;
}
/**
* 處理GET請求
*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
/**
* 響應POST請求
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
int count=0;
SmartUpload mySmartUpload = new SmartUpload();
try {
// 初始化
mySmartUpload.initialize(config,request,response);
// 上載
mySmartUpload.upload();
com.kinstar.issuing.file.File f1 = mySmartUpload.getFiles().getFile(0);
// com.kinstar.issuing.file.File f2 = mySmartUpload.getFiles().getFile(1);
String backPic = f1.getFileName();
//String name2 = f2.getFileName();
long size=0;
// 保存上載文件到指定目錄
count=mySmartUpload.save("ads");
response.sendRedirect("program.jsp?dopass=ture");
}
catch (Exception e){
response.sendRedirect("fail.jsp");
}
}2.common-fileupload組件
挺好用的,也能夠上傳大文件,我試過,300M以上的文件上傳本地傳非常快,異地測試也能夠上傳成功.
首先要下載org.apache.commons.fileupload包和org.apache.commons.io包
下面是我的servlet
package com.kinstar.issuing.action;
import java.io.IOException;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import java.io.*;
import java.sql.SQLException;
import java.util.*;
import java.text.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.regex.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import com.kinstar.issuing.objects.t_user;
import com.kinstar.issuing.operation.UserOperation;
import com.kinstar.issuing.program.programService;
import com.kinstar.issuing.session.SessionGloble;
import com.kinstar.issuing.util.StringUtil;
/**
* @version 1.0
* @author gyf
*/
public class uploadProgramAction extends HttpServlet{
private static final String CONTENT_TYPE = "text/html; charset=GB2312";
/**
* 處理GET請求
*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
/**
* 響應POST請求
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 變量定義
response.setContentType(CONTENT_TYPE);
HttpSession modifysession=request.getSession();
SessionGloble logonUser;
logonUser=(SessionGloble)modifysession.getAttribute("UserInfo");
if(logonUser==null){
response.sendRedirect("mainindex.jsp");
}
t_user userinfo=new t_user();
UserOperation user=null;
try {
user = new UserOperation();
} catch (Exception e1) {
// TODO 自動生成 catch 塊
e1.printStackTrace();
}
try {
userinfo=user.getUser(logonUser.getUserId());
} catch (Exception e2) {
// TODO 自動生成 catch 塊
e2.printStackTrace();
}
//System.out.println("figure="+userinfo.getUserFigure());
PrintWriter out=response.getWriter();
DateFormat updf = new SimpleDateFormat("yyyyMMddHHmm");
String updateTime = updf.format(new Date());
int isNeed = 0;
String IsCheck="0";
//省農行用戶上傳的節目必需顯示，且審批已經合格
if(userinfo.getUserFigure().equals("1")){
isNeed = 1;
IsCheck = "1";
}
else{
isNeed = 0;
IsCheck = "0";
}
int type=0;
String avaTime="";
String screen="";
int fileTime=0;
int fileTimeReal=0;
int circle=0;
String picSwitch="";
String deleState="1";
String backPic="";
String fieldName="";
String finalName="";
String fileNameReal="";
long size=0;
String name="";
try {
DiskFileUpload fu = new DiskFileUpload();
// 設置允許用戶上傳文件大小,單位:字節，這里設為2m
fu.setSizeMax(5*1024*1024*1024);
// 設置最多只允許在內存中存儲的數據,單位:字節
fu.setSizeThreshold(10*1024*1024);
// 設置一旦文件大小超過getSizeThreshold()的值時數據存放在硬盤的目錄
fu.setRepositoryPath("C:\\WINDOWS\\Temp\\");
//開始讀取上傳信息
List fileItems = fu.parseRequest(request);
//依次處理每個上傳的文件
Iterator iter = fileItems.iterator();
//正則匹配，過濾路徑取文件名
String regExp=".+\\\\(.+)$";
//過濾掉的文件類型
String[] errorType={".exe",".com",".cgi",".asp"};
Pattern p = Pattern.compile(regExp);
StringUtil su = new StringUtil();
while (iter.hasNext()) {
FileItem item = (FileItem)iter.next();
if(item.isFormField()) {
// 獲得表單域的名字
fieldName = item.getFieldName();
// 如果表單域的名字是name…
if(fieldName.equals("type"))
type = Integer.parseInt(item.getString());
}
if (!item.isFormField()) {
name = item.getName();
size = item.getSize();
if((name==null||name.equals("")) && size==0)
continue;
Matcher m = p.matcher(name);
boolean result = m.find();
if (result){
for (int temp=0;temp<errorType.length;temp++){
if (m.group(1).endsWith(errorType[temp])){
throw new IOException(name+": wrong type");
}
}
DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String date = df.format(new Date());
fileNameReal=date+m.group(1);
finalName=date+Math.round(Math.random()*10000)+fileNameReal.substring(fileNameReal.indexOf("."));
//保存上傳的文件到指定的目錄
//在下文中上傳文件至數據庫時，將對這里改寫
item.write(new File(getServletContext().getRealPath(".//ads//")+finalName));
//out.print(finalName+size);
}
else
{
throw new IOException("fail to upload");
}
}
if(item.isFormField()) {
// 獲得表單域的名字
fieldName = item.getFieldName();
if(fieldName.equals("avaTime"))
avaTime=item.getString();
if(fieldName.equals("screen"))
screen=item.getString();
if(fieldName.equals("fileTime"))
fileTime = Integer.parseInt(item.getString());
if(fieldName.equals("fileTimeReal"))
fileTimeReal = Integer.parseInt(item.getString());
if(fieldName.equals("circle"))
circle = Integer.parseInt(item.getString());
if(fieldName.equals("switchPic"))
picSwitch = item.getString();
}
}
}catch (IOException e){
out.println(e);
}catch (FileUploadException e){
out.println(e);
} catch (Exception e) {
// TODO 自動生成 catch 塊
e.printStackTrace();
}
if(finalName.equals("")){
response.sendRedirect("fail.jsp");
}
else{
try {
programService ps = new programService();
ps.insertProgram(userinfo.getUserId(),updateTime,type,finalName,size,isNeed,avaTime,deleState,IsCheck,userinfo.getCity(),backPic,screen,fileTime,fileTimeReal,picSwitch,circle,userinfo.getUserFigure(),new String(fileNameReal.getBytes("GB2312"),"ISO8859-1"));
response.sendRedirect("program.jsp?dopass=true");
} catch (Exception e3) {
// TODO 自動生成 catch 塊
e3.printStackTrace();
}
}
}
}看完上述內容，你們掌握在Java項目中實現文件上傳的方法的方法了嗎？如果還想學到更多技能或想了解更多相關內容，歡迎關注億速云行業資訊頻道，感謝各位的閱讀！
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