介绍两个jsp上传组件commons-fileupload和SmartUpload(部分来自网页)

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java

JSP Servlet J#Tomcat HTML

第1个上传组件commons-fileupload
=============commons-fileupload ================

common-fileupload组件是apache的一个开源项目之一，可以从http://jakarta.apache.org/commons/fileupload/下载。该组件简单易用，可实现一次上传一个或多个文件，并可限制文件大小。
-下载后解压zip包，将commons-fileupload-1.1.1.jar,和commons-io-1.2.jar复制到tomcat的webapps\你的webapp\WEB-INF\lib\下，如果目录不存在请自建目录。
新建一个servlet: FileUpload.java用于文件上传：
package com.drp.util.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.*;
import java.util.*;
import java.util.regex.*;
import java.io.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;

public class FileUpload extends HttpServlet {

private String uploadPath = ""; // 用于存放上传文件的目录

private File tempPath = new File("D:\\Tomcat 5.5\\webapps\\drp1.2\\tempimages\\"); // 用于存放临时文件的目录

public void doPost(HttpServletRequest req, HttpServletResponse res)
   throws ServletException, IOException {
  res.setContentType("text/html; charset=GB18030");
  PrintWriter out = res.getWriter();
  System.out.println(req.getContentLength());
  System.out.println(req.getContentType());
  DiskFileItemFactory factory = new DiskFileItemFactory();
  // maximum size that will be stored in memory
  //允许设置内存中存储数据的门限，单位：字节
  factory.setSizeThreshold(4096);
  // the location for saving data that is larger than getSizeThreshold()
  //如果文件大小大于SizeThreshold，则保存到临时目录
  factory.setRepository(new File("D:\\Tomcat 5.5\\webapps\\drp1.2\\tempimages"));

  ServletFileUpload upload = new ServletFileUpload(factory);
  // maximum size before a FileUploadException will be thrown
  //最大上传文件，单位：字节
  upload.setSizeMax(1000000);
  try {
   List fileItems = upload.parseRequest(req);
   // assume we know there are two files. The first file is a small
   // text file, the second is unknown and is written to a file on
   // the server
   Iterator iter = fileItems.iterator();

// 正则匹配，过滤路径取文件名
String regExp = ".+\\\\(.+)$";

   // 过滤掉的文件类型
   String[] errorType = { ".exe", ".com", ".cgi", ".asp" };
   Pattern p = Pattern.compile(regExp);
   String itemNo = "";//文件存放路径
   while (iter.hasNext()) {
    FileItem item = (FileItem) iter.next();

    // 忽略其他不是文件域的所有表单信息
    if (!item.isFormField()) {
     String name = item.getName();
     long 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");
       }
      }
      try {

// 保存上传的文件到指定的目录

// 在下文中上传文件至数据库时，将对这里改写
item.write(new File("d:\\" + m.group(1)));

out.print(name+"  "+size+"<br>");

      } catch (Exception e) {
       out.println(e);
      }

     } else {
      throw new IOException("fail to upload");
     }
    }
   }
  } catch (IOException e) {
   out.println(e);
  } catch (FileUploadException e) {
   out.println(e);
  }
}

public void init() throws ServletException {
this.uploadPath = this.getServletConfig().getInitParameter("upload_path");//的到web.xml中的配置文件用于保存上传文件，也可以在已开始定义的时候初始化，不过这样可以通过改动配置文件来改动存放路径，不用该代码，增加了灵活性。
}
}

web.xml中相应的配置如下：
<servlet>

<servlet-name>FileUpload</servlet-name>
<servlet-class>com.drp.util.servlet.FileUpload</servlet-class>//注意路径

<init-param>
<param-name>upload_path</param-name>
<param-value>D:\\Tomcat 5.5\\webapps\\drp1.2\\images\\item\\</param-value>//存放地址 </init-param>
</servlet>

<servlet-mapping>

<servlet-name>FileUpload</servlet-name>
<url-pattern>/servlet/FileUpload</url-pattern>

</servlet-mapping>

对应的请求文件：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>index.html</title>

</head>

<body>
//注意action地址，还有enctype要写成multipart/form-data，和method="POST" <form name="uploadform" method="POST" action="./servlet/FileUpload" ENCTYPE="multipart/form-data">

文件1：<input name="x" size="40" type="file">

</td></tr>

文件2：<input name="y" size="40" type="file">

</td></tr>

文件3：<input name="z" size="40" type="file">

</td></tr>

</table>

<table>

</table>

</form>

</body>
</html>

第二个组件SmartUpload
=================SmartUpload=================================================
SmartUpload.zip 下载地址： http://dev2dev.bea.com.cn/bbs/servlet/D2DServlet/download/121-20468-118409-1176/SmartUpload.zip
解压后有6个主要文件：ServletUpload.java，SmartFile.java，SmartFiles.java，SmartRequest.java，SmartUpload.java， SmartUploadException.java 将其放在你的javabeen目录下，注意每个文件的包名和你的存放位置是否相否，
由于不能传中文，根据网站上的介绍对其中的SmartUpload.java做修改添加toUtf8String(String s)方法：
改动后SmartUpload.java的全部代码如下：红色代表改动的部分：
package com.drp.upload;//写你自己的包名

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;

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 SmartFiles m_files;
    private SmartRequest 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 SmartFiles();
        m_formRequest = new SmartRequest();
    }

    /**
     * @deprecated Method init is deprecated
     */
    public final void init(ServletConfig servletconfig) throws ServletException
    {
        m_application = servletconfig.getServletContext();
    }

    /**
     * @deprecated Method service is deprecated
     */
    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();
    }

    /**
     * @deprecated Method initialize is deprecated
     */
    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;
        boolean flag1 = false;
        //boolean flag2 = false;
        long l = 0L;
        //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();
        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)
            {
                SmartFile file = new SmartFile();
                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("/");
            //System.out.println("s == null,m_application.getRealPath:" + s);
        }
        if(s.indexOf("/") != -1)
        {
            if(s.charAt(s.length() - 1) != '/')
            {
                s = s + "/";
                //System.out.println("m_application.getRealPath::" + s);
            }
        }
        else
        {
            if(s.charAt(s.length() - 1) != '\\')
            {
                s = s + "\\";
                //System.out.println("m_application.getRealPath" + s);
            }
        }
        //System.out.println("m_application.getRealPath:::" + s);
        FileNames = new String[m_files.getCount()];
        for(int k = 0;k < m_files.getCount();k++)
        {
            if(!m_files.getFile(k).isMissing())
            {
                //System.out.println("s + m_files.getFile(k).getFileName():" + s + m_files.getFile

(k).getFileName());
                m_files.getFile(k).saveAs(s + m_files.getFile(k).getFileName(),i);
                FileNames[j] = s + m_files.getFile(k).getFileName();
                j++;
            }
        }

return j;
}

    //Add
    private String[] FileNames;
    public String[] getFileNames()
    {
        //Method may expose internal representation by returning array
        //Returning an array value stored in one of the object's fields exposes the internal representation of

the object.? For classes shared by other untrusted classes, this could potentially be a security issue.?

Returning a new copy of the array is better approach in many situations.
        String[] vFileNames = new String[FileNames.length];
        System.arraycopy(FileNames,0,vFileNames,0,FileNames.length);
        return vFileNames;
    }

    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 SmartFiles getFiles()
    {
        return m_files;
    }

    public SmartRequest 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=" +
     toUtf8String(getFileName(s)));
else
if(s2.length() == 0)
     m_response.setHeader("Content-Disposition",
     m_contentDisposition);
else
     m_response.setHeader("Content-Disposition",

     m_contentDisposition + " filename=" + toUtf8String(s2));

while((long)k < l)
{
     int j = fileinputstream.read(abyte0, 0, i);
     k += j;
     m_response.getOutputStream().write(abyte0, 0, j);
}
fileinputstream.close();
    }

public static String toUtf8String(String s) {
StringBuffer sb = new StringBuffer();
for (int i=0;i<s.length();i++) {
     char c = s.charAt(i);
     if (c >= 0 && c <= 255) {
  sb.append(c);
     } else {
  byte[] b;
  try {
      b = Character.toString(c).getBytes("utf-8");
  } catch (Exception ex) {
      System.out.println(ex);
      b = new byte[0];
  }
  for (int j = 0; j < b.length; j++) {
      int k = b[j];
      if (k < 0) k += 256;
      sb.append("%" + Integer.toHexString(k).
      toUpperCase());
  }
     }
}
return sb.toString();
    }
    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('.') + 1;
        j = s.length();
        s1 = s.substring(i,j);
        if(s.lastIndexOf('.') > 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();
        //boolean flag = false;
        int i = 0;
        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();
        String s1 = "";
        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 = "";
        //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()
    {
        //boolean flag = false;
        int i = m_currentIndex;
        int j = 0;
        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();
        //boolean flag = false;
        //boolean flag1 = false;
        //boolean flag2 = false;
        int i = 0;
        i = s.lastIndexOf('/');
        if(i != -1)
        {
            return s.substring(i + 1,s.length());
        }
        i = s.lastIndexOf('\\');
        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 != "")
            if(!s2.equals(""))
            {
                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 != "")
            if(!s2.equals(""))
            {
                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
    {
        //boolean flag = false;
        int i = 0;
        int j = 0;
        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;
        }
    }

}

下面是上传的应用：
首先是一个请求页面：
upload.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>文件上传</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>

<body>
<p> </p>
<p align="center">上传资源</p>
<FORM METHOD="POST" ACTION="do_upload.jsp"
ENCTYPE="multipart/form-data">
<table width="75%" border="1" align="center">
    <tr>
      <td><div align="center">1、
          <input type="FILE" name="FILE1" size="30">
        </div></td>
    </tr>
      <td><div align="center">
          <input type="submit" name="Submit" value="上传">
        </div></td>
    </tr>
</table>
</FORM>
</body>
</html>
然后是处理页面：do_upload.jsp

<%@ page contentType="text/html; charset=gb2312" language="java"
import="java.util.*,com.drp.upload.*" errorPage="" %>//注意包名
<html>
<head>
<title>文件上传处理页面</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>

<body>
<%
// 新建一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 上传初始化
su.initialize(pageContext);
// 设定上传限制
// 1.限制每个上传文件的最大长度。
// su.setMaxFileSize(10000);
// 2.限制总上传数据的长度。
// su.setTotalMaxFileSize(20000);
// 3.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");
// 4.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");
out.println(count+"个文件上传成功！<br>");

// 逐一提取上传文件信息，同时可保存文件。
for (int i=0;i<su.getFiles().getCount();i++)
{
  SmartFile file = su.getFiles().getFile(i);

  // 若文件不存在则继续
  if (file.isMissing()) continue;

  // 显示当前文件信息
  out.println("<TABLE BORDER=1>");
  out.println("<TR><TD>表单项名（FieldName）</TD><TD>"
  + file.getFieldName() + "</TD></TR>");
  out.println("<TR><TD>文件长度（Size）</TD><TD>" +
  file.getSize() + "</TD></TR>");
  out.println("<TR><TD>文件名（FileName）</TD><TD>"
  + file.getFileName() + "</TD></TR>");
  out.println("<TR><TD>文件扩展名（FileExt）</TD><TD>"
  + file.getFileExt() + "</TD></TR>");
  out.println("<TR><TD>文件全名（FilePathName）</TD><TD>"
  + file.getFilePathName() + "</TD></TR>");
  out.println("</TABLE><BR>");

  // 将文件另存
  // file.saveAs("/upload/" + myFile.getFileName());
  // 另存到以WEB应用程序的根目录为文件根目录的目录下
  // file.saveAs("/upload/" + myFile.getFileName(),
    //su.SAVE_VIRTUAL);
  // 另存到操作系统的根目录为文件根目录的目录下
  // file.saveAs("c:\\temp\\" + myFile.getFileName(),
  //su.SAVE_PHYSICAL);

}
%>
</body>
</html>

下载：
请求页面：download.html

<html>
<head>
<title>下载</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<form action="do_download.jsp" method="post" name="form1" >
<table width="400" border="1" align="center">
    <tr>
      <td><div align="center">文件下载</div></td>
    </tr>
    <tr>
      <td><div align="center">选择文件：
          <input name="file" type="file" size="25">
      </div></td>
    </tr>
    <tr>
      <td><div align="center">
        <input type="submit" name="Submit" value="提交">
        <input type="reset" name="Submit" value="重置">
      </div></td>
    </tr>
</table>
</form>
</body>
</html>
处理页面：do_download.jsp
<%@ page language="java" contentType="text/html; charset=gbk" import="java.util.*,com.drp.upload.*"
pageEncoding="gbk"%>
<% request.setCharacterEncoding("gbk"); %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<title>Insert title here</title>

<%
response.setCharacterEncoding("gbk");
String finame = request.getParameter("file");
  // 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(finame);

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最爱巴乔（生活就是一场挑战，就象踢点球） | Tomcat解决URL传中文的方法

2007-09-28 21:39
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