Java-FileUploadUtil工具类

package com.gootrip.util;import java.io.File;import java.util.*;import org.apache.commons.fileupload.*;import javax.servlet.http.HttpServletRequest;import java.util.regex.Pattern;import java.io.IOException;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import java.util.regex.Matcher;public class FileUploadUtil {    //当上传文件超过限制时设定的临时文件位置，注意是绝对路径    private String tempPath = null;    //文件上传目标目录，注意是绝对路径    private String dstPath = null;    //新文件名称，不设置时默认为原文件名    private String newFileName = null;    //获取的上传请求    private HttpServletRequest fileuploadReq = null;    //设置最多只允许在内存中存储的数据,单位:字节，这个参数不要设置太大    private int sizeThreshold = 4096;    //设置允许用户上传文件大小,单位:字节    //共10M    private long sizeMax = 10485760;    //图片文件序号    private int picSeqNo = 1;    private boolean isSmallPic = false;    public FileUploadUtil(){    }    public FileUploadUtil(String tempPath, String destinationPath){        this.tempPath  = tempPath;        this.dstPath = destinationPath;    }    public FileUploadUtil(String tempPath, String destinationPath, HttpServletRequest fileuploadRequest){        this.tempPath   = tempPath;        this.dstPath = destinationPath;        this.fileuploadReq = fileuploadRequest;    }    /** 文件上载     * @return true —— success; false —— fail.     */    public boolean Upload(){        DiskFileItemFactory factory = new DiskFileItemFactory();        try {            //如果没有上传目的目录，则创建它            FileUtil.makeDirectory(dstPath+"/ddd");            /*if (!FileUtil.makeDirectory(dstPath+"/ddd")) {                throw new IOException("Create destination Directory Error.");            }*/            //如果没有临时目录，则创建它            FileUtil.makeDirectory(tempPath+"/ddd");            /*if (!FileUtil.makeDirectory(tempPath+"/ddd")) {                throw new IOException("Create Temp Directory Error.");            }*/            //上传项目只要足够小，就应该保留在内存里。            //较大的项目应该被写在硬盘的临时文件上。            //非常大的上传请求应该避免。            //限制项目在内存中所占的空间，限制最大的上传请求，并且设定临时文件的位置。            //设置最多只允许在内存中存储的数据,单位:字节            factory.setSizeThreshold(sizeThreshold);            // the location for saving data that is larger than getSizeThreshold()            factory.setRepository(new File(tempPath));            ServletFileUpload upload = new ServletFileUpload(factory);            //设置允许用户上传文件大小,单位:字节            upload.setSizeMax(sizeMax);            List fileItems = upload.parseRequest(fileuploadReq);            // 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", ".php", ".jsp"};            Pattern p = Pattern.compile(regExp);            while (iter.hasNext()) {                System.out.println("++00++====="+newFileName);                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();                    System.out.println("++++====="+name);                    long size = item.getSize();                    //有多个文件域时，只上传有文件的                    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 File Type");                            }                        }                        String ext = "."+FileUtil.getTypePart(name);                        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                            //没有指定新文件名时以原文件名来命名                            if (newFileName == null || newFileName.trim().equals(""))                            {                                item.write(new File(dstPath +"/"+ m.group(1)));                            }                            else                            {                                String uploadfilename = "";                                if (isSmallPic)                                {                                    uploadfilename = dstPath +"/"+ newFileName+"_"+picSeqNo+"_small"+ext;                                }                                else                                {                                    uploadfilename = dstPath +"/"+ newFileName+"_"+picSeqNo+ext;                                }                                //生成所有未生成的目录                                System.out.println("++++====="+uploadfilename);                                FileUtil.makeDirectory(uploadfilename);                                //item.write(new File(dstPath +"/"+ newFileName));                                item.write(new File(uploadfilename));                            }                            picSeqNo++;                            //out.print(name + "&nbsp;&nbsp;" + size + "<br>");                        } catch (Exception e) {                            //out.println(e);                            throw new IOException(e.getMessage());                        }                    } else {                        throw new IOException("fail to upload");                    }                }            }        } catch (IOException e) {            System.out.println(e);        } catch (FileUploadException e) {            System.out.println(e);        }        return true;    }    /**从路径中获取单独文件名     * @author     *     * TODO 要更改此生成的类型注释的模板，请转至     * 窗口 － 首选项 － Java － 代码样式 － 代码模板     */    public String GetFileName(String filepath)    {        String returnstr = "*.*";        int length       = filepath.trim().length();        filepath = filepath.replace('\\', '/');        if(length >0)        {            int i = filepath.lastIndexOf("/");            if (i >= 0)            {                filepath  = filepath.substring(i + 1);                returnstr = filepath;            }        }        return returnstr;    }    /**     * 设置临时存贮目录     */    public void setTmpPath(String tmppath)    {        this.tempPath = tmppath;    }    /**     * 设置目标目录     */    public void setDstPath(String dstpath) {        this.dstPath = dstpath;    }    /**     * 设置最大上传文件字节数，不设置时默认10M     */    public void setFileMaxSize(long maxsize) {        this.sizeMax = maxsize;    }    /**     * 设置Http 请求参数，通过这个能数来获取文件信息     */    public void setHttpReq(HttpServletRequest httpreq) {        this.fileuploadReq = httpreq;    }    /**     * 设置Http 请求参数，通过这个能数来获取文件信息     */    public void setNewFileName(String filename) {        this.newFileName = filename;    }    /**     * 设置此上传文件是否是缩略图文件，这个参数主要用于缩略图命名     */    public void setIsSmalPic(boolean isSmallPic) {        this.isSmallPic = isSmallPic;    }    /**     * 设置Http 请求参数，通过这个能数来获取文件信息     */    public void setPicSeqNo(int seqNo) {        this.picSeqNo = seqNo;    }}