javascript
jsp上传组件 -凯发k8官方网
=============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 "
");
} 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：
对应的请求文件：
//注意action地址，还有enctype要写成multipart/form-data，和method="post"
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
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
上传资源
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
<%
// 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！
");
// 逐一提取上传文件信息，同时可保存文件。
for (int i=0;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("
out.println("");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("
| 表单项名（fieldname） | " file.getfieldname() " |
| 文件长度（size） | " file.getsize() " |
| 文件名（filename） | " file.getfilename() " |
| 文件扩展名（fileext） | " file.getfileext() " |
| 文件全名（filepathname） | " file.getfilepathname() " |
");
// 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);
}
%>
下载：
请求页面：download.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"); %>
<%
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);
%>
转载于:https://www.cnblogs.com/kentyshang/archive/2008/07/02/1234216.html
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