smartupload.java

java上传文件工具非常实用 java上传文件工具非常实用

      } else
      if(destFileName.length()==0){
        m_response.setHeader("Content-Disposition","attachment;");
      } else{
        m_response.setHeader("Content-Disposition",
            "attachment; filename=".
            concat(String.valueOf(destFileName)));
      }
      m_response.getOutputStream().write(b,0,b.length);
    }
  }

  public void downloadField(ResultSet rs,String columnName,String contentType,
      String destFileName) throws SQLException,
      IOException,ServletException{
    if(rs==null){
      throw new IllegalArgumentException("The RecordSet cannot be null (1045).");
    }
    if(columnName==null){
      throw new IllegalArgumentException(
          "The columnName cannot be null (1050).");
    }
    if(columnName.length()==0){
      throw new IllegalArgumentException(
          "The columnName cannot be empty (1055).");
    }
    byte b[]=rs.getBytes(columnName);
    if(contentType==null){
      m_response.setContentType("application/x-msdownload");
    } else{
      if(contentType.length()==0){
        m_response.setContentType("application/x-msdownload");
      } else{
        m_response.setContentType(contentType);
      }
    }
    m_response.setContentLength(b.length);
    if(destFileName==null){
      m_response.setHeader("Content-Disposition","attachment;");
    } else{
      if(destFileName.length()==0){
        m_response.setHeader("Content-Disposition","attachment;");
      } else{
        destFileName=new String(destFileName.getBytes("GB2312"),"ISO8859-1");
        m_response.setHeader("Content-Disposition",
            "attachment; filename=".concat(String.valueOf(
            destFileName)));
      }
    }
    m_response.getOutputStream().write(b,0,b.length);
  }

  public void fieldToFile(ResultSet rs,String columnName,
      String destFilePathName) throws SQLException,
      SmartUploadException,IOException,ServletException{
    try{
      if(m_application.getRealPath(destFilePathName)!=null){
        destFilePathName=m_application.getRealPath(destFilePathName);
      }
      InputStream is_data=rs.getBinaryStream(columnName);
      FileOutputStream file=new FileOutputStream(destFilePathName);
      int c;
      while((c=is_data.read())!=-1){
        file.write(c);
      }
      file.close();
    } catch(Exception e){
      throw new SmartUploadException(
          "Unable to save file from the DataBase (1020).");
    }
  }

  private String getDataFieldValue(String dataHeader,String fieldName){
    String token=new String();
    String value=new String();
    int pos=0;
    int i=0;
    int start=0;
    int end=0;
    token=String.valueOf((new StringBuffer(String.valueOf(fieldName))).
        append("=").
        append('"'));
    pos=dataHeader.indexOf(token);
    if(pos>0){
      i=pos+token.length();
      start=i;
      token="\"";
      end=dataHeader.indexOf(token,i);
      if(start>0&&end>0){
        value=dataHeader.substring(start,end);
      }
    }
    return value;
  }

  private String getFileExt(String fileName){
    String value=new String();
    int start=0;
    int end=0;
    if(fileName==null){
      return null;
    }
    start=fileName.lastIndexOf(46)+1;
    end=fileName.length();
    value=fileName.substring(start,end);
    if(fileName.lastIndexOf(46)>0){
      return value;
    } else{
      return "";
    }
  }

  private String getContentType(String dataHeader){
    String token=new String();
    String value=new String();
    int start=0;
    int end=0;
    token="Content-Type:";
    start=dataHeader.indexOf(token)+token.length();
    if(start!=-1){
      end=dataHeader.length();
      value=dataHeader.substring(start,end);
    }
    return value;
  }

  private String getTypeMIME(String ContentType){
    String value=new String();
    int pos=0;
    pos=ContentType.indexOf("/");
    if(pos!=-1){
      return ContentType.substring(1,pos);
    } else{
      return ContentType;
    }
  }

  private String getSubTypeMIME(String ContentType){
    String value=new String();
    int start=0;
    int end=0;
    start=ContentType.indexOf("/")+1;
    if(start!=-1){
      end=ContentType.length();
      return ContentType.substring(start,end);
    } else{
      return ContentType;
    }
  }

  private String getContentDisp(String dataHeader){
    String value=new String();
    int start=0;
    int end=0;
    start=dataHeader.indexOf(":")+1;
    end=dataHeader.indexOf(";");
    value=dataHeader.substring(start,end);
    return value;
  }

  private void getDataSection(){
    boolean found=false;
    String dataHeader=new String();
    int searchPos=m_currentIndex;
    int keyPos=0;
    int boundaryLen=m_boundary.length();
    m_startData=m_currentIndex;
    m_endData=0;
    do{
      if(searchPos>=m_totalBytes){
        break;
      }
      if(m_binArray[searchPos]==(byte)m_boundary.charAt(keyPos)){
        if(keyPos==boundaryLen-1){
          m_endData=((searchPos-boundaryLen)+1)-3;
          break;
        }
        searchPos++;
        keyPos++;
      } else{
        searchPos++;
        keyPos=0;
      }
    } while(true);
    m_currentIndex=m_endData+boundaryLen+3;
  }

  private String getDataHeader(){
    int start=m_currentIndex;
    int end=0;
    int len=0;
    boolean found=false;
    while(!found){
      if(m_binArray[m_currentIndex]==13&&
          m_binArray[m_currentIndex+2]==13){
        found=true;
        end=m_currentIndex-1;
        m_currentIndex=m_currentIndex+2;
      } else{
        m_currentIndex++;
      }
    }
    String dataHeader=new String(m_binArray,start,(end-start)+1);
    return dataHeader;
  }

  private String getFileName(String filePathName){
    String token=new String();
    String value=new String();
    int pos=0;
    int i=0;
    int start=0;
    int end=0;
    pos=filePathName.lastIndexOf(47);
    if(pos!=-1){
      return filePathName.substring(pos+1,filePathName.length());
    }
    pos=filePathName.lastIndexOf(92);
    if(pos!=-1){
      return filePathName.substring(pos+1,filePathName.length());
    } else{
      return filePathName;
    }
  }

  public void setDeniedFilesList(String deniedFilesList) throws SQLException,
      IOException,ServletException{
    String ext="";
    if(deniedFilesList!=null){
      ext="";
      for(int i=0;i<deniedFilesList.length();i++){
        if(deniedFilesList.charAt(i)==','){
          if(!m_deniedFilesList.contains(ext)){
            m_deniedFilesList.addElement(ext);
          }
          ext="";
        } else{
          ext=ext+deniedFilesList.charAt(i);
        }
      }

      if(ext!=""){
        m_deniedFilesList.addElement(ext);
      }
    } else{
      m_deniedFilesList=null;
    }
  }

  public void setAllowedFilesList(String allowedFilesList){
    String ext="";
    if(allowedFilesList!=null){
      ext="";
      for(int i=0;i<allowedFilesList.length();i++){
        if(allowedFilesList.charAt(i)==','){
          if(!m_allowedFilesList.contains(ext)){
            m_allowedFilesList.addElement(ext);
          }
          ext="";
        } else{
          ext=ext+allowedFilesList.charAt(i);
        }
      }

      if(ext!=""){
        m_allowedFilesList.addElement(ext);
      }
    } else{
      m_allowedFilesList=null;
    }
  }

  public void setDenyPhysicalPath(boolean deny){
    m_denyPhysicalPath=deny;
  }

  public void setForcePhysicalPath(boolean force){
    m_forcePhysicalPath=force;
  }

  public void setContentDisposition(String contentDisposition){
    m_contentDisposition=contentDisposition;
  }

  public void setTotalMaxFileSize(long totalMaxFileSize){
    m_totalMaxFileSize=totalMaxFileSize;
  }

  public void setMaxFileSize(long maxFileSize){
    m_maxFileSize=maxFileSize;
  }

  protected String getPhysicalPath(String filePathName,int option) throws
      IOException{
    String path=new String();
    String fileName=new String();
    String fileSeparator=new String();
    boolean isPhysical=false;
    fileSeparator=System.getProperty("file.separator");
    if(filePathName==null){
      throw new IllegalArgumentException(
          "There is no specified destination file (1140).");
    }
    if(filePathName.equals("")){
      throw new IllegalArgumentException(
          "There is no specified destination file (1140).");
    }
    if(filePathName.lastIndexOf("\\")>=0){
      path=filePathName.substring(0,filePathName.lastIndexOf("\\"));
      fileName=filePathName.substring(filePathName.lastIndexOf("\\")+1);
    }
    if(filePathName.lastIndexOf("/")>=0){
      path=filePathName.substring(0,filePathName.lastIndexOf("/"));
      fileName=filePathName.substring(filePathName.lastIndexOf("/")+1);
    }
    path=path.length()!=0?path:"/";
    File physicalPath=new File(path);
    if(physicalPath.exists()){
      isPhysical=true;
    }
    if(option==0){
      if(isVirtual(path)){
        path=m_application.getRealPath(path);
        if(path.endsWith(fileSeparator)){
          path=path+fileName;
        } else{
          path=String.valueOf((new StringBuffer(String.valueOf(path))).
              append(fileSeparator).append(fileName));
        }
        return path;
      }
      if(isPhysical){
        if(m_denyPhysicalPath){
          throw new IllegalArgumentException("Physical path is denied (1125).");
        } else{
          return filePathName;
        }
      } else{
        throw new IllegalArgumentException("This path does not exist (1135).");
      }
    }
    if(option==1){
      if(isVirtual(path)){
        path=m_application.getRealPath(path);
        if(path.endsWith(fileSeparator)){
          path=path+fileName;
        } else{
          path=String.valueOf((new StringBuffer(String.valueOf(path))).
              append(fileSeparator).append(fileName));
        }
        return path;
      }
      if(isPhysical){
        throw new IllegalArgumentException("The path is not a virtual path.");
      } else{
        throw new IllegalArgumentException("This path does not exist (1135).");
      }
    }
    if(option==2){
      if(isPhysical){
        if(m_denyPhysicalPath){
          throw new IllegalArgumentException("Physical path is denied (1125).");
        } else{
          return filePathName;
        }
      }
      if(isVirtual(path)){
        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 destFilePathName) throws SmartUploadException,
      IOException{
    int intsize=0;
    int pos=0;
    int readBytes=0;
    if(destFilePathName==null){
      throw new IllegalArgumentException(
          "There is no specified destination file (1025).");
    }
    if(destFilePathName.length()==0){
      throw new IllegalArgumentException(
          "There is no specified destination file (1025).");
    }
    if(!isVirtual(destFilePathName)&&m_denyPhysicalPath){
      throw new SmartUploadException("Physical path is denied (1035).");
    }
    intsize=m_request.getContentLength();
    m_binArray=new byte[intsize];
    for(;pos<intsize;pos+=readBytes){
      try{
        readBytes=m_request.getInputStream().read(m_binArray,pos,
            intsize-pos);
      } catch(Exception e){
        throw new SmartUploadException("Unable to upload.");
      }
    }

    if(isVirtual(destFilePathName)){
      destFilePathName=m_application.getRealPath(destFilePathName);
    }
    try{
      File file=new File(destFilePathName);
      file.createNewFile();
      FileOutputStream fileOut=new FileOutputStream(file);
      fileOut.write(m_binArray);
      fileOut.close();
    } catch(Exception e){
      throw new SmartUploadException(
          "The Form cannot be saved in the specified file (1030).");
    }
  }

  private boolean isVirtual(String pathName){
    if(m_application.getRealPath(pathName)!=null){
      File virtualFile=new File(m_application.getRealPath(pathName));
      return virtualFile.exists();
    } else{
      return false;
    }
  }

  /**
   * 将文件名中的汉字转为UTF8编码的串,以便下载时能正确显示另存的文件名.
   * 纵横软件制作中心雨亦奇2003.08.01
   * @param s 原文件名
   * @return 重新编码后的文件名
   */
  public 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();
  }
}