liferay中使用liferay-ui进行文件上传

在liferay中使用liferay-ui进行文件上传比较容易，效果还不错，下面我们来看都需要哪些代码

1，jsp页面中，见下面代码

<%
for (int i = 1; i <= 5; i++) {
%>

<tr>
<td>
<liferay-ui:message key="file" /> <%= i %>
</td>
<td>
<input name="<portlet:namespace />msgFile<%= i %>" size="70" type="file" />
</td>
</tr>

<%
}
%>

通过循环控制上传文件个数

2，我们再看action的部分，如下代码

List files = new ArrayList();

if (attachments) {
UploadPortletRequest uploadReq =
PortalUtil.getUploadPortletRequest(req);

for (int i = 1; i <= 5; i++) {
File file = uploadReq.getFile("msgFile" + i);
String fileName = uploadReq.getFileName("msgFile" + i);
byte[] bytes = FileUtil.getBytes(file);

if ((bytes != null) && (bytes.length > 0)) {
ObjectValuePair ovp = new ObjectValuePair(fileName, bytes);

files.add(ovp);
}
}
}

将request中的文件存放在list中

3，最后在service进行保存，如下代码

if (files.size() > 0) {
long companyId = issue.getCompanyId();
String portletId = CompanyImpl.SYSTEM_STRING;
long groupId1 = GroupImpl.DEFAULT_PARENT_GROUP_ID;
long repositoryId = CompanyImpl.SYSTEM;
String dirName = issue.getAttachmentsDir();

try {
try {
dlService.deleteDirectory(
companyId, portletId, repositoryId, dirName);
}
catch (NoSuchDirectoryException nsde) {
}

dlService.addDirectory(companyId, repositoryId, dirName);

for (int i = 0; i < files.size(); i++) {
ObjectValuePair ovp = (ObjectValuePair)files.get(i);

String fileName = (String)ovp.getKey();
byte[] byteArray = (byte[])ovp.getValue();

try {
dlService.addFile(
companyId, portletId, groupId1, repositoryId,
dirName + "/" + fileName, StringPool.BLANK,
new String[0], byteArray);
}
catch (DuplicateFileException dfe) {
}
}
}
catch (RemoteException re) {
throw new SystemException(re);
}
}
这样通过documentlibrary的DLService进行文件保存