liferay5.2.3 附件上传
1、首先要在liferay项目中的service.xml? 中找到需要关联附件的表对应的entity标签,，在</entity>之前加上
2、就是对jsp（或者html）中的表单加上一个属性enctype="multipart/form-data"
3.就是保存表单提交给服务器的处理了
首先就是要获得一个uploadRequest 对象
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4.ContractLocalServiceImpl中的实现
try {
}
contractPersistence.update(contract);
5.附件的显示
"get.contract.annex.file" />
6、下载
?5中已经把下载的连接写出来了，这里就是后台的处理了，如下：
String? fileName = contract.getAuthorizationBookName();
?
String? filePath = TextUtil.getAnnexPath("contract_authorization_book
", createUserId, contractId)+separator+fileName;//这个与上面保存文件使用的是同一个方法获得路径
?
?
?
??? ??? ??? HttpServletResponse response=PortalUtil.getHttpServletResponse(portletResponse);
??? ??? ??? InputStream is = null;
??? ??? ???
??? ??? ??? try {
??? ??? ??? ??? is = DLLocalServiceUtil.getFileAsStream(
??? ??? ??? ??? ??? ??? companyId, CompanyConstants.SYSTEM, filePath);
??? ??? ??? ??? int contentLength = (int)DLServiceUtil.getFileSize(
??? ??? ??? ??? ??? ??? companyId, CompanyConstants.SYSTEM, filePath);
??? ??? ??? ??? response.setHeader(
??? ??? ??? ??? ??? ??? HttpHeaders.CACHE_CONTROL, HttpHeaders.CACHE_CONTROL_PUBLIC_VALUE);
??? ??? ??? ??? response.setHeader(HttpHeaders.PRAGMA, HttpHeaders.PRAGMA_PUBLIC_VALUE);
??? ??? ??? ???
??? ??? ??? ??? String contentDisposition =
??? ??? ??? ??? ?? "attachment; filename=\"" + new String(fileName.getBytes("UTF-8"),"ISO-8859-1") + "\"";
??? ??? ??? ??? response.setContentLength(contentLength);
??? ??? ??? ??? response.setHeader(
??? ??? ??? ??? ??? ??? HttpHeaders.CONTENT_DISPOSITION, contentDisposition);
??? ??? ??? ??? write(response, is, contentLength);
??? ??? ??? ???
??? ??? ??? }
??? ??? ??? finally {
??? ??? ??? ??? ServletResponseUtil.cleanUp(is);
??? ??? ??? }??
?
?
?
下面是就是附带的几个下载的时候需要的方法
?
?
??? publicstaticvoid write(
??? ??? ??? HttpServletResponse response, InputStream is, int contentLength)
??? ??? throws IOException {
?
??? ??? OutputStream os = null;
?
??? ??? try {
??? ??? ??? if (!response.isCommitted()) {
??? ??? ??? ??? if (contentLength > 0) {
??? ??? ??? ??? ??? response.setContentLength(contentLength);
??? ??? ??? ??? }
?
??? ??? ??? ??? os = new BufferedOutputStream(response.getOutputStream());
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??? ??? ??? ??? int c = is.read();
?
??? ??? ??? ??? while (c != -1) {
??? ??? ??? ??? ??? os.write(c);
?
??? ??? ??? ??? ??? c = is.read();
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? ??? finally {
??? ??? ??? cleanUp(os, is);
??? ??? }
??? }
???
??? publicstaticvoid cleanUp(OutputStream os, InputStream is) {
??? ??? cleanUp(os);
??? ??? cleanUp(is);
??? }
??? publicstaticvoid cleanUp(OutputStream os) {
??? ??? try {
??? ??? ??? if (os != null) {
??? ??? ??? ??? os.flush();
??? ??? ??? }
??? ??? }
??? ??? catch (Exception e) {
??? ??? ??? if (_log.isWarnEnabled()) {
??? ??? ??? ??? _log.warn(e);
??? ??? ??? }
??? ??? }
?
??? ??? try {
??? ??? ??? if (os != null) {
??? ??? ??? ??? os.close();
??? ??? ??? }
??? ??? }
??? ??? catch (Exception e) {
??? ??? ??? if (_log.isWarnEnabled()) {
??? ??? ??? ??? _log.warn(e);
??? ??? ??? }
??? ??? }
??? }
??? publicstaticvoid cleanUp(InputStream is) {
??? ??? try {
??? ??? ??? if (is != null) {
??? ??? ??? ??? is.close();
??? ??? ??? }
??? ??? }
??? ??? catch (Exception e) {
??? ??? ??? if (_log.isWarnEnabled()) {
??? ??? ??? ??? _log.warn(e);
??? ??? ??? }
??? ??? }
??? }
???
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?
?
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附注，因为在程序涉及到了比较多的逻辑处理，这里写是最主要的过程，具体的逻辑处理可以自己发挥！