将以前的自已写的东西代走，以备以后用——文件上传下载

public class ESImgUploadUtil
        extends FrameworkObject {
	/*
	 * 文件上传功能
	 * @author LYJ
	 * @date 2010/09/05
	 */
	private static final long serialVersionUID = 1L;
	private long sysMaxSize = (5024*1024);
    private List fileTypes = Arrays.asList(new String[]{".GIF",".JPG",".JPEG"});
    public static final String FILE_SEPARATOR = "file.separator";
    public static final String DEFAULT_FILE_UPLOAD_PATH = "repository";
    private String msg = "";
    private ESImgUploadModel eSImgUploadModel = new ESImgUploadModel();
    private EsRepairFacade facade = new EsRepairFacade();
    private List upLoadFileList = new ArrayList();

    public String imgFileUpLoad(HttpServletRequest request,String curId,String itemId){

   	 DiskFileUpload diskFileUpload = new DiskFileUpload();
   	 //设置文件流编码
   	 if(request.getCharacterEncoding().equals("")||request.getCharacterEncoding()==null){
   		 diskFileUpload.setHeaderEncoding("UTF_8");
   	 }else{
   		 diskFileUpload.setHeaderEncoding(request.getCharacterEncoding());
   	 }
   	 //获得用户当前项目路径
   	 String dir = getProperty(USER_DIR);
   	 String tempDir = dir+"\\imgTemp";
   	 String upLoadDir = dir+"\\imgUpLoad";
   	 File temp_Dir = new File(tempDir);
   	 File upLoad_Dir = new File(upLoadDir);
   	 eSImgUploadModel.setSizeMax(sysMaxSize);
   	 //检查目是否存在,若不存在  刚创建此目录
   	 try {
   		 if(!temp_Dir.exists()){
   			 //创建目录
       		 temp_Dir.mkdir();
       	 }
   		 if(!upLoad_Dir.exists()){
   			 upLoad_Dir.mkdir();
   		 }
			
		} catch (Exception e) {
			msg += e.getMessage();
		}
   	 
   	 //设置上传文件大小
   	 diskFileUpload.setSizeMax(sysMaxSize);
   	 //设置充许存在在内存缓存中的大小
   	 diskFileUpload.setSizeThreshold(4096);
   	 //设置上传文件的大小一但超过setSizeThreshold大小时，即存到RepositoryPath的物理路径下
   	 diskFileUpload.setRepositoryPath(DEFAULT_FILE_UPLOAD_PATH + System.getProperty(FILE_SEPARATOR)); 
   	 //得到上传信息
   	 try {
		 List list = diskFileUpload.parseRequest(request);
		 Iterator iter = list.iterator();
	   	 while(iter.hasNext()){
	   		 FileItem item = (FileItem)iter.next();
	   		 if(!item.isFormField()){
	   			eSImgUploadModel.setItemId(itemId);
	   			 String fileName = item.getName();
	   			 eSImgUploadModel.setFilePath(upLoadDir);
	   			 fileName = fileName.substring(fileName.lastIndexOf("\\")+1);//获得文件名，且不包括路路径
	   			 eSImgUploadModel.setFileName(fileName);
	   			 long fileSize = item.getSize();
	   			 eSImgUploadModel.setFileSize(fileSize);
	   			 //获取文件类型
	   			 String fileType = fileName.substring(fileName.lastIndexOf("."));
	   			 eSImgUploadModel.setFileType(fileType);
	   			 fileType = fileType.toUpperCase();
	   			 if(fileTypes.contains(fileType)){
	           			 if(fileName != null && !fileName.equals("") && fileSize!= 0){
	           				 //开始操作文件的上读入
	           				 item.write(new File(upLoadDir,fileName));
	           				 upLoadFileList.add(eSImgUploadModel);
	           				facade.upLoadPhoto(eSImgUploadModel,curId);
	           			 }
	   			 }else{
	   				msg += "SERVICE.MESSAGE_FILE_TYPE";
	   			 }
	   		 }
	   	 }
	} catch (FileUploadException e) {
		msg += e.getMessage();
	} catch (Exception e) {
		msg += e.getMessage();
	}
    	return msg;
    	
    }
    
    public String getMessage(){
    	return  this.msg;
    }
    public List upLoadFileList(){
    	if(this.upLoadFileList.size()< 1){
    		return null;
    	}else{
    		return this.upLoadFileList;
    	}
    }
   
}