public void init(ServletConfig config) throws ServletException {
super.init(config);
try {
// 应用的相对路径前缀
String prefix = config.getServletContext().getRealPath("/");
if (prefix == null) prefix = "";
// 获取配置文件的文件名称
uploadPath = config.getInitParameter(this.UPLOAD_FILE_PATH_PARAM);
// 文件不存在提醒信息
alarmMessage =
config.getInitParameter(this.FILE_UN_EXIST_ALARM) == null
? alarmMessage
: config.getInitParameter(this.FILE_UN_EXIST_ALARM);
// 是否是相对路径
String isRelatePath =
config.getInitParameter(this.UPLOAD_FILE_PATH_RELATE_FLAG_PARAM) == null
? "true"
: config.getInitParameter(this.UPLOAD_FILE_PATH_RELATE_FLAG_PARAM);
if (isRelatePath.equalsIgnoreCase("true"))
uploadPath = prefix + (uploadPath.indexOf("/") == 0 ? "" : "/") + uploadPath;
if ((uploadPath.lastIndexOf("/") + 1) != uploadPath.length()) uploadPath += "/";
logger.info("file upload path=" + uploadPath);
} catch (Exception e) {
logger.error("fileDownload Servlet init Error:" + e.getMessage());
e.printStackTrace();
}
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
* javax.servlet.http.HttpServletResponse)
*/
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
String downFileName = req.getParameter(this.DOWN_DISPLAY_FILENAME);
String realFileName = req.getParameter(this.DOWN_REAL_FILENAME);
String isNewWindow = null;
try {
isNewWindow = req.getParameter(this.DOWN_IS_NEW_WINDOW);
} catch (Exception e) {
logger.info("file downLoadServlet:本页面下载文件!");
e.printStackTrace();
}
logger.info("下载文件为:" + uploadPath + realFileName);
File downFile = new File(uploadPath + realFileName);
resp.setContentType("text/html;charset=UTF-8");
// resp.setCharacterEncoding("UTF-8");
if (!downFile.exists()) {
System.out.println("下载文件为=" + downFileName);
logger.info("下载文件为:" + new String(downFileName.getBytes(), "UTF-8") + "不存在!");
String alarm =
StringUtil.replaceStr(alarmMessage, "{0}", new String(downFileName.getBytes(), "UTF-8"));
resp.getWriter().print("<script type=\"text/javascript\">");
resp.getWriter().print("alert('" + alarm + "');");
if (isNewWindow != null) {
resp.getWriter().print("window.close();");
}
resp.getWriter().print("</script>");
return;
}
try {
resp.setContentType("application/x-download");
resp.setHeader(
"Content-Disposition", "attachment;filename=" + URLEncoder.encode(downFileName, "UTF-8"));
ServletOutputStream out = resp.getOutputStream();
InputStream inStream = new FileInputStream(downFile);
// 循环取出流中的数据
byte[] b = new byte[1024];
int len;
while ((len = inStream.read(b)) > 0) out.write(b, 0, len);
out.flush();
out.close();
inStream.close();
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getMessage());
}
}
/**
* 解压资源到web应用指定的路径下 目前不采取比较版本文件方式，采用非覆盖解压模式,对于已经存在的文件不做修改
*
* @param pResources
* @param pDestPath
* @throws Exception
*/
private static void loadResource(ResourceFile resModel, String webHome)
throws LoadResourcesException {
String exportDir =
webHome
+ (resModel.getUnzipPath().indexOf(File.separator) != 0 ? File.separator : "")
+ resModel.getUnzipPath();
try {
InputStream resources = ResourcesLoader.class.getResourceAsStream(resModel.getResource());
ZipInputStream zis = new ZipInputStream(resources);
FileUtil.unzip(zis, exportDir, false);
} catch (Exception e) {
final String MSG =
"解压缩资源文件:" + resModel.getResource() + " 到 " + resModel.getUnzipPath() + "失败!";
logger.error(MSG);
throw new LoadResourcesException(MSG, e);
}
}