JAVA培训之SmartUpload使用 笔记

java hutool multipart参数摘要：1.简介：Hutool工具类库2.Java中Multipart参数的使用3.Hutool中的Multipart操作方法4.实例：使用Hutool和Multipart处理文件上传5.总结：Hutool与Multipart合作的优势和局限性正文：近年来，Java开发中，上传下载文件变得越来越普遍。

为了简化这个过程，许多开发者选择使用Hutool工具类库。

本文将介绍如何在Java中使用Hutool与Multipart参数进行文件上传和下载，以及相关操作方法。

首先，简要介绍一下Hutool工具类库。

Hutool是一个Java工具类库，提供了许多实用的功能，如文件操作、日期处理、加密解密等。

它极大地简化了Java开发中的常见操作，使开发者能够更加专注于业务逻辑的实现。

在Java中，Multipart参数主要用于处理文件上传和下载。

通常，我们在Web开发中，通过HttpServletRequest对象获取Multipart对象。

而在Hutool中，我们可以直接使用其提供的Multipart操作方法，更加方便地处理文件上传和下载。

下面，我们来看一下Hutool中Multipart操作的方法。

1.获取Multipart对象：```javaMultipartMap multipartMap =ServletUtil.getMultipartMap(request);```2.获取文件上传：```javaFileUpload fileUpload = FileUpload.init(multipartMap);```3.获取文件下载：```javaFileDownload fileDownload = FileDownload.init(multipartMap);```4.处理文件上传：```java// 实例化一个文件上传处理器FileUploadListener fileUploadListener = new FileUploadListener() { @Overridepublic void fileUploaded(File file) {System.out.println("文件上传成功：" +file.getAbsolutePath());}@Overridepublic void fileUploadFailed(File file, Exception e) {System.out.println("文件上传失败：" + file.getAbsolutePath());}};// 设置文件上传处理器fileUpload.setListener(fileUploadListener);// 判断是否包含文件上传if (fileUpload.isMultipart()) {// 上传文件File uploadFile = fileUpload.execute();System.out.println("上传文件：" + uploadFile.getAbsolutePath());}```5.处理文件下载：```java// 实例化一个文件下载处理器FileDownloadListener fileDownloadListener = new FileDownloadListener() {@Overridepublic void fileDownloaded(File file) {System.out.println("文件下载成功：" +file.getAbsolutePath());}@Overridepublic void fileDownloadFailed(File file, Exception e) {System.out.println("文件下载失败：" +file.getAbsolutePath());}};// 设置文件下载处理器fileDownload.setListener(fileDownloadListener);// 下载文件String downloadFilePath = fileDownload.execute();System.out.println("下载文件：" + downloadFilePath);```通过以上方法，我们可以方便地在Java项目中处理文件上传和下载。

FileUpload是Apache组织（）提供的免费的上传组件， 可以直接从Apache站点上下载（下载地址： /fileupload/），本书使用的版本是1.2.1，下 载界面如图8-9所示。但是FileUpload组件本身还依赖于commons组件， 所以从Apache下载此组件的时候还需要连同commons组件的IO包一起下 载（下载地址：/io/）
构造
实例化FileUploadTools类，并接收request对 象、最大上传文件限制、上传临时保存 目录路径 根据参数名称取得参数内容

2
普通
3
4
public String[] getParameterValues(String name)
public Map<String, FileItem> getUploadFiles()
E-MAIL：mldnqa@
上传原理
使用fileupload组件接收完全部的数据之后，所有的数据都保存在了List集 合之中，则就需要使用Iterator输出每一个，但是由于其中既有普通的文 本数据又有上传的文件，每一个上传内容都使用一个FileItem类对象表示 。 所以当使用Iterator依次取出每一个FileItem对象的时候，就可以使用 FileItem类中的isFormField()方法来判断当前操作的内容是普通的文本还 是上传文件，如果是上传文件，则将文件的内容依次取出；如果是普通的 文本，则直接通过getString()方法取得具体的信息。
E-MAIL：mldnqa@
FileUpload的问题
学习完了FileUpload组件的基本操作之后，实际上对于这种组件也是存在 了以下的几个不便之处： 无法像使用request.getParameter()方法那样准确的取得提交的参数 ； 无法像使用request.getParameterValues()那样准确的取得一组提交 参数； 所有的上传文件都需要进行依次的判断，才能够分别保存，不能一次 性批量保存。

一、文件上传入门1. 应用：用户上传头像、上传图片、邮件上传附件等2. 页面表单的实现文件上传表单和普通表单有两个区别1) 表单的提交方式必须是 post2) 需要文件上传字段 <input type=”file” />3) form 表单的 enctype 属性需要指定为 multipart/form-data3. 服务器端解析request在 Servlet 中通过 request.getInputStream 获得表单上传数据，会发现数据是分段发送的由于自己写程序解析有难度，我们可以使用Apache 开发的开源组件Commons-fileupload 需要导入 jar 包Commons-fileupload 和Commons-io4 . UploadServlet 中处理文件上传程序二、文件上传处理细节1. 中文乱码问题1) 文件名中文乱码问题，解决办法：告诉文件上传组件以什么编码方式来解码文件名ServletUpload.setCharacterEncoding(“utf-8”);request. setCharacterEncoding(“utf-8”);2) 普通字段中文乱码问题fileitem.getString(“utf-8”);2. 临时文件3. 文件存放目录1) 目录需要隐藏，禁止外界直接访问2) 文件名需要保证不重复3) 文件应该分目录存放三、上传进度条1. 实现进度监听需要实现对文件上传进度的监听，需要给FileUpload 对象添加 ProgressListener2. 在jsp 页面显示进度实验：1) 使用 iframe 发送请求，请求一个Servlet, 在Servlet 中返回响应,发送自增的num此时会发现 iframe 会不停第想Servlet发送请求2) 点击文件上传按钮后，iframe立刻停止刷新，直至上传完毕页面跳转至新页面3）为了观察实验结果，将form 的 target 指定为 iframe， UploadServlet回送上传完毕的结果4) 出现上述问题的原因，浏览器不支持多线程同时访问服务器只能同时发送一个请求，这样的访问方式为同步访问5) 要在文件上传的同时在iframe中实现进度访问，就需要ie浏览器与服务器进行异步交互此时就需要 XMLHttpRequest 对象在javascript中可以直接使用XMLHttpRequest 对象与服务器进行异步通信获得XmlHttpRequest 对象的方式有两种ie7以上版本var xhr = null;if(window.XMLHttpRequest)xhr = new XMLHttpRequest();ie7以下版本if(window.ActiveXObject)xhr = new ActiveXObject(“Microsoft.XMLHTTP”);获得对象后需要调用open方法输入请求地址注意请求方式，地址的输入，并且需要设置为true 指定异步访问该地址xhr.open(“get”,”/upload/servlet/UploadServlet”, false)// 调用send 方法发送请求，post方式需要发送消息体，get方式则不用直接传入null值xhr.send(null);// 访问 responseText 属性获得 Servlet 回送的数据document.write(xhr.responseText);四、 api方法1. DiskFileItemFactory 对象设置缓冲区大小，字节为单位，默认为10K，一般不用修改factory.setSizeThreshold(1000);设置临时文件存放目录factory.setRepository(file);2. ServletFileUpload 对象判断是否为文件上传表单boolean b = upload.i sMultipartContent(request);解析request对象List<FileItem> list = upload.parseRequest(request);设置上传文件的最大值setFileSizeMax(long fileSizeMax)设置上传文件总量的最大值setSizeMax(long sizeMax)设置编码格式setHeaderEncoding(ng.String encoding)注册进度监听器setProgressListener(ProgressListener pListener)3. FileItem 对象获得表单字段的属性名item.getFieldName();获得普通字段的值item.getString(charsetName)获得文件上传字段的文件名item.getName()获得文件上传的流item.getInputStream()。

JspSmart之upload组件源码及使用·JSP教程:tomcat配置数据库连接池·Windows 2000 server下搭建JSP网站环境·JSP网站开发环境的目录结构标准·Jsp页面实现文件上传下载·Jsp常用功能:CSV文件的生成与分析关键词:JspSmart之upload组件源码及使用JspSmart之upload组件源码主要包括了5个java文件File.javaimport java.io.ByteArrayInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.math.BigInteger;import java.sql.ResultSet;import java.sql.SQLException;import javax.servlet.ServletException;// Referenced classes of package com.jspsmart.upload: // SmartUploadException, SmartUploadpublic 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)).longValu e();j = BigInteger.valueOf(m_size).mod(BigInteger.valueOf(i)).intValue();try{for(int i1 = 1; (long)i1 < l; i1++){resultset.updateBinaryStream(s, new ByteArrayInputStream(m_parent.m_binArray, k, i), i);k = k != 0 ? k : 1;k = i1 * i + m_startData;}if(j > 0)resultset.updateBinaryStream(s, new ByteArrayInputStream(m_parent.m_binArray, k, j), j);}catch(SQLException sqlexception){byte abyte0[] = new byte[m_size];System.arraycopy(m_parent.m_binArray, m_startData, abyte0, 0, m_size);resultset.updateBytes(s, abyte0);}catch(Exception exception){throw new SmartUploadException("Unable to save file in the DataBase (1130).");}}public boolean isMissing(){return m_isMissing;}public String getFieldName(){return m_fieldname;}public String getFileName(){return m_filename;}public String getFilePathName(){return m_filePathName;}public String getFileExt(){return m_fileExt;}public String getContentType(){return m_contentType;}public String getContentDisp(){return m_contentDisp;}public String getContentString(){String s = new String(m_parent.m_binArray, m_startData, m_size);return s;}public String getTypeMIME()throws IOException{return m_typeMime;}public String getSubTypeMIME(){return m_subTypeMime;}public int getSize(){return m_size;}protected int getStartData(){return m_startData;protected int getEndData(){return m_endData;}protected void setParent(SmartUpload smartupload) {m_parent = smartupload;}protected void setStartData(int i){m_startData = i;}protected void setEndData(int i){m_endData = i;}protected void setSize(int i){m_size = i;}protected void setIsMissing(boolean flag){m_isMissing = flag;}protected void setFieldName(String s){m_fieldname = s;}protected void setFileName(String s)m_filename = s;}protected void setFilePathName(String s) {m_filePathName = s;}protected void setFileExt(String s){m_fileExt = s;}protected void setContentType(String s) {m_contentType = s;}protected void setContentDisp(String s) {m_contentDisp = s;}protected void setTypeMIME(String s) {m_typeMime = s;}protected void setSubTypeMIME(String s) {m_subTypeMime = s;}public byte getBinaryData(int i){if(m_startData + i > m_endData)throw new ArrayIndexOutOfBoundsException("Index Out of range (1115).");if(m_startData + i <= m_endData)return m_parent.m_binArray[m_startData + i];elsereturn 0;}}Files.javaimport java.io.IOException;import java.util.*;// Referenced classes of package com.jspsmart.upload:// File, SmartUploadpublic 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).");elsereturn 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.javaimport 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.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;elsereturn (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).");if(hashtable == null)return null;String as[] = new String[hashtable.size()];for(int i = 0; i < hashtable.size(); i++)as[i] = (String)hashtable.get(new Integer(i));return as;}}SmartUploadException .javapublic class SmartUploadException extends Exception {SmartUploadException(String s){super(s);}}SmartUpload.javaimport 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, Filepublic 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;elsem_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("T otal File Size exceeded (1110).");}if(flag3){com.facet.jspsmart.upload.File file = new com.facet.jspsmart.upload.File();file.setParent(this);file.setFieldName(s3);file.setFileName(s4);file.setFileExt(s5);file.setFilePathName(s6);file.setIsMissing(s6.length() == 0);file.setContentType(s7);file.setContentDisp(s8);file.setTypeMIME(s9);file.setSubTypeMIME(s10);if(s7.indexOf("application/x-macbinary") > 0)m_startData = m_startData + 128;file.setSize((m_endData - m_startData) + 1);file.setStartData(m_startData);file.setEndData(m_endData);m_files.addFile(file);} else{String s11 = new String(m_binArray, m_startData, (m_endData - m_startData) + 1);m_formRequest.putParameter(s3, s11);}if((char)m_binArray[m_currentIndex + 1] == '-')break;}}public int save(String s)throws ServletException, IOException, SmartUploadException{return save(s, 0);}public int save(String s, int i)throws ServletException, IOException, SmartUploadException{int j = 0;if(s == null)s = m_application.getRealPath("/");if(s.indexOf("/") != -1){if(s.charAt(s.length() - 1) != '/')s = s + "/";} elseif(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");elseif(s1.length() == 0)m_response.setContentType("application/x-msdownload");elsem_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));elseif(s2.length() == 0)m_response.setHeader("Content-Disposition",m_contentDisposition);elsem_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");elseif(s1.length() == 0)m_response.setContentType("application/x-msdownload");elsem_response.setContentType(s1);m_response.setContentLength(abyte0.length);if(s2 == null)m_response.setHeader("Content-Disposition", "attachment;");elseif(s2.length() == 0)m_response.setHeader("Content-Disposition", "attachment;");elsem_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 = stIndexOf(46) + 1;j = s.length();s1 = s.substring(i, j);if(stIndexOf(46) > 0)return s1;elsereturn "";}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);elsereturn 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 = stIndexOf(47);if(i != -1)return s.substring(i + 1, s.length());i = stIndexOf(92);if(i != -1)return s.substring(i + 1, s.length());elsereturn 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(stIndexOf("\\") >= 0){s1 = s.substring(0, stIndexOf("\\"));s2 = s.substring(stIndexOf("\\") + 1);}if(stIndexOf("/") >= 0){s1 = s.substring(0, stIndexOf("/"));s2 = s.substring(stIndexOf("/") + 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;elses1 = s1 + s3 + s2;return s1;}if(flag){if(m_denyPhysicalPath)throw new IllegalArgumentException("Physical path is denied (1125).");elsereturn 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;elses1 = s1 + s3 + s2;return s1;}if(flag)throw new IllegalArgumentException("The path is not a virtual path.");elsethrow new IllegalArgumentException("This path does not exist (1135).");}if(i == 2){if(flag)if(m_denyPhysicalPath)throw new IllegalArgumentException("Physical path is denied (1125).");elsereturn s;if(isVirtual(s1))throw new IllegalArgumentException("The path is not a physical path.");elsethrow 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。