package com.highcom.object.common; import java.io.*; import javax.servlet.*; import com.jspsmart.upload.*; import com.highcom.hcgip.basic.common.*; import javax.servlet.http.*; /**  * 处理系统中的各类附件。这些附件被保存到在config.properties中attachmentpath指定的路径下。  * <p>Title: Objective Management System</p>  * <p>Description: </p>  * <p>Copyright: Copyright (c) 2004</p>  * @version 1.0  */ public class FileKeeper     extends javax.servlet.http.HttpServlet {     public static String base_dir;     static {         base_dir = PropertiesReader.getConfigValue("attachmentpath");     }     public FileKeeper() {     }     public static String getRelativePath(java.io.File abs_path){         String fullpath= abs_path.getAbsolutePath();         String new_fullpath = fullpath.replaceAll("/","\\").toLowerCase();         String new_base_dir = base_dir.replaceAll("/","\\").toLowerCase();         int i=new_fullpath.indexOf(new_base_dir);         if(i<0){            return fullpath;         }else{             return  fullpath.substring(i);         }      }     /**      * 上传一个文件,保存到指定文件夹。      * @param for_upload File 需要保存的文件      * @param relative_dir String 指定的文件夹(相对路径),路径用"\\"分割。      * @param rename boolean 是否要系统自动重命名为其它名字      * @return String 如果保存成功,返回相对地址。否则,返回null      */     public static String upload(com.jspsmart.upload.File for_upload,                                       String relative_dir, boolean rename) {         if (for_upload == null) {             return null;         }         if (relative_dir == null || relative_dir.length() == 0) {             relative_dir = "\\";         }         if (!relative_dir.startsWith("\\")) {             relative_dir = "\\" + relative_dir;         }         if (!relative_dir.endsWith("\\")) {             relative_dir = relative_dir + "\\";         }         java.io.File dir = new java.io.File(base_dir + relative_dir);         if (!dir.exists()) {             dir.mkdirs();         }         java.io.File saved = null;         if (rename) {             try {                 saved = java.io.File.createTempFile("sys", "", dir);             }             catch (Exception ex) {                 ex.printStackTrace();                 Log.debug(ex, "FileKeeper");             }         }         else {             String filename = for_upload.getFileName();             saved = new java.io.File(dir.getAbsolutePath() +                                      java.io.File.separator + filename);         }         if (saved == null) {             return null;         }         try {             for_upload.saveAs(saved.getAbsolutePath(),                               SmartUpload.SAVE_PHYSICAL);         }         catch (Exception ex) {             ex.printStackTrace();             Log.debug(ex, "FileKeeper");             saved = null;         }         if(saved!=null){             return relative_dir + saved.getName();         }else{             return null;         }     }     /**      * 取得一个指定文件的流。      * @param relative_path String 相对路径,包含文件名。      * @return InputStream 该文件的输入流,供外部程序读取。      */     public static InputStream download(String relative_path) {         if (!relative_path.startsWith("\\")) {             relative_path = "\\" + relative_path;         }         java.io.File file = new java.io.File(base_dir + relative_path);         if (!file.exists()) {             return null;         }         else {             try {                 return new FileInputStream(file);             }             catch (Exception ex) {                 ex.printStackTrace();                 Log.debug(ex, "FileKeeper");                 return null;             }         }     }     /**      * 删除指定文件。      * @param relative_path String 文件的相对路径。请不要以“/”开头。可以用"\"开头,也可以不用。      */     public static void delete(String relative_path){         if(!relative_path.startsWith("\\")){             relative_path = "\\"+relative_path;         }         java.io.File file = new java.io.File(base_dir+relative_path);         if(file.exists() && file.isFile()){             file.delete();         }     }     public void doPost(HttpServletRequest request, HttpServletResponse response) throws         ServletException, IOException {         //System.out.println("do post....");         doGet(request, response);     }     /**      * 处理下载文件的请求。需要在request中提供三个参数:      * 1.path,说明需要下载的文件的相对路径,包含磁盘文件名本身。      * 2.filename,说明一个文件名,这个文件名将成为用户保存文件时的默认用户名。如果不提供,系统取在path中的文件名      * 3.mime,说明文件的MIME_TYPE。如果不提供,默认为"application/*"。      * @param request HttpServletRequest      * @param response HttpServletResponse      * @throws ServletException      * @throws IOException      */     public void doGet(HttpServletRequest request, HttpServletResponse response) throws         ServletException, IOException {         //System.out.println("FileKeeper do get...");         String relative_path = ParameterParser.getStrPara(request, "path");         String filename = ParameterParser.getStrPara(request, "filename");         String mime = ParameterParser.getStrPara(request, "mime");         if (mime.length() > 0) {             response.setContentType(mime);         }         else {             response.setContentType("application/*");         }         response.setHeader("Content-Disposition",                            "attachment;filename=" + filename);         InputStream in = download(relative_path);         if (in == null) {             Log.debug("文件" + filename + "不存在.", this);             response.getOutputStream().close();             return;         }         byte[] b = new byte[1024];         int len;         while ( (len = in.read(b)) > 0) {             response.getOutputStream().write(b, 0, len);         }         in.close();         response.getOutputStream().flush();         response.getOutputStream().close();     } }
   
 
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