html:file 参考”struts学习笔记.doc” 自编的一个的文件上传类 com.cn.rolia.util.struts.upload .UploadUtil.java package com.cn.rolia.util.struts.upload;   import org.apache.struts.upload.FormFile;   import java.io.BufferedOutputStream; import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.HashSet; import java.util.Iterator; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory;   /**  *  * @author rolia  *  */ public class UploadUtil {          /*           * FormFile,表示要上传的文件           */          FormFile file;          /**           * 保存目录           */          String savePath;          /**           * 文件大小           */          int fileSize;          /**           * 上传文件的最大值,单位为 byte           */          int sizeLimited;          /**           * 文件名           */          String fileName;          /**           * 文件类型           */          String fileType;          /**           * 允许的文件类型           */          HashSet allowedExt;                   public UploadUtil(FormFile file){                    this.file = file;                    this.fileSize=file.getFileSize();                    this.fileName=file.getFileName();                    this.fileType=file.getContentType();                    this.savePath = null;                    allowedExt = null;                    this.sizeLimited = 0;          }            public UploadUtil(FormFile file,String savePath){                    this.file = file;                    this.fileSize=file.getFileSize();                    this.fileName=file.getFileName();                    this.fileType=file.getContentType();                    this.savePath = savePath;                    allowedExt = null;                    this.sizeLimited = 0;          }          public UploadUtil(FormFile file,String savePath,HashSet allowedExt){                    this.file = file;                    this.fileSize=file.getFileSize();                    this.fileName=file.getFileName();                    this.fileType=file.getContentType();                    this.savePath = savePath;                    this.allowedExt = allowedExt;                    this.sizeLimited = 0;          }          public UploadUtil(FormFile file,String savePath,HashSet allowedExt,int sizeLimited){                    this.file = file;                    this.fileSize=file.getFileSize();                    this.fileName=file.getFileName();                    this.fileType=file.getContentType();                    this.savePath = savePath;                    this.allowedExt = allowedExt;                    this.sizeLimited = sizeLimited;          }                     public UploadUtil(FormFile file,String savePath,HashSet allowedExt,int sizeLimited,String fileName){                    this.file = file;                    this.fileSize=file.getFileSize();                    this.fileName=fileName;                    this.fileType=file.getContentType();                    this.savePath = savePath;                    this.sizeLimited = sizeLimited;                    this.allowedExt = allowedExt;          }                   /**           * 保存文件操作。           * 以下情况会抛出异常：           * 1。      上传文件的类型不允许           * 2。      上传文件的大小超出允许的最大值           * 3。      没有指定文件的保存路径           * 4。      指定的文件保存路径不存在           * 5。      服务器上已有与上传文件同名的文件           * 6。     IO错误           * @throws Exception 文件保存过程中出现的异常。           */          public void writeFile()throws Exception{                    Log log = LogFactory.getLog(UploadUtil.class);                                       //过滤上传文件的类型                    if(allowedExt==null){                             log.info("Allow all types of file being uploaded!");                    }else{                             boolean flag = false;                             Iterator iterator = allowedExt.iterator();                             while(iterator.hasNext() && flag==false){                                      flag = this.fileName.endsWith(iterator.next().toString());                             }                             if(flag==false){                                      log.warn("The type of file \""+this.fileName+"\" is firbided!");                                      throw new UploadException("The type of file \""+this.fileName+"\" is firbided!");                             }                    }                                       //设置允许上传文件的最大值                    if((sizeLimited!=0) && (this.fileSize > this.sizeLimited)){                             log.warn("The file is greater than "+this.sizeLimited+"bytes");                             throw new UploadException("The file is greater than "+this.sizeLimited+"bytes");                    }                                       //检查是否指定了保存路径                    if(savePath==null){                             log.error("The destination file being saved is not assigned!");                             throw new UploadException("The destination file being saved is not assigned!");                    }                                       //检查指定的路径是否存在                    File saveFile = new File(savePath+"\\"+this.fileName);                    if(!saveFile.getParentFile().exists()){                             log.error("The Directory: "+savePath+" is not exists!");                             throw new UploadException("The Directory: \""+savePath+"\" is not exists!");                    }                                       //检查服务器里是否已经存在此上传的文件                    if(saveFile.exists()){                             log.error("The file: "+saveFile.getPath()+" has existed!");                             throw new UploadException("The file: \""+saveFile.getPath()+"\" has existed!");                    }                                       //开始上传                    InputStream in = null;                    OutputStream out = null;                    try{                             in = new BufferedInputStream(file.getInputStream());                             out = new BufferedOutputStream(new FileOutputStream(saveFile));                             int b;                             while((b=in.read())!=-1){                                      out.write((char)b);                             }                    }catch(IOException e){                             log.error(e.getMessage());                             throw new IOException(e.getMessage());                    }                    finally{                             try{                                      if(out!=null)out.close();                                      if(in!=null)in.close();                             }catch(IOException e){                                      log.error(e.getMessage());                                      throw new IOException(e.getMessage());                             }                    }                    file.destroy();                    log.info("File \""+saveFile.getPath()+"\" has been saved successfully!");          }          public HashSet getAllowedExt() {                    return allowedExt;          }          public FormFile getFile() {                    return file;          }          public String getFileName() {                    return fileName;          }          public int getFileSize() {                    return fileSize;          }          public String getFileType() {                    return fileType;          }          public int getSizeLimited() {                    return sizeLimited;          }          public String getSavePath() {                    return savePath;          }          public void setAllowedExt(HashSet allowedExt) {                    this.allowedExt = allowedExt;          }          public void setFileName(String fileName) {                    this.fileName = fileName;          }          public void setSizeLimited(int sizeLimited) {                    this.sizeLimited = sizeLimited;          }          public void setSavePath(String savePath) {                    this.savePath = savePath;          } }

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