Liferay7 BPM门户开发之28: Portlet文件上传,及实体类同步更新上传

抓住核心 。

Liferay文件上传的核心就是使用UploadPortletRequest类

继承关系
java.lang.Object
  extended byjavax.servlet.ServletRequestWrapper
    extended byjavax.servlet.http.HttpServletRequestWrapper
      extended bycom.liferay.util.servlet.UploadPortletRequest

实现关系:
Implemented Interfaces:

  • javax.servlet.http.HttpServletRequest
  • javax.servlet.ServletRequest

单一文件上传

jsp代码

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui"%>
<%@ taglib uri="http://liferay.com/tld/ui" prefix="liferay-ui"%>
<portlet:defineObjects /> <portlet:actionURL name="upload" var="uploadFileURL"></portlet:actionURL> <aui:form action="<%= uploadFileURL %>" enctype="multipart/form-data" method="post"> <aui:input type="file" name="fileupload" /> <aui:button name="Save" value="Save" type="submit" /> </aui:form>

java:

import java.io.File;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import org.apache.commons.io.FileUtils;
import com.liferay.portal.kernel.upload.UploadPortletRequest;
import com.liferay.portal.util.PortalUtil;
import com.liferay.util.bridges.mvc.MVCPortlet; public class RelatedFilesPortlet extends MVCPortlet { private final static int ONE_GB = ; private final static String baseDir = "/tmp/uploaded/"; private final static String fileInputName = "fileupload"; public void upload(ActionRequest request, ActionResponse response)
throws Exception { UploadPortletRequest uploadRequest = PortalUtil.getUploadPortletRequest(request); long sizeInBytes = uploadRequest.getSize(fileInputName); if (uploadRequest.getSize(fileInputName) == ) {
throw new Exception("文件为空!");
} // 从uploadRequest获得File对象
File uploadedFile = uploadRequest.getFile(fileInputName); String sourceFileName = uploadRequest.getFileName(fileInputName); // 存储文件的目录
File folder = new File(baseDir); // 对当前目录做可用空间检查
if (folder.getUsableSpace() < ONE_GB) {
throw new Exception("空间不足1GB!");
} // 最终的文件路径
File filePath = new File(folder.getAbsolutePath() + File.separator + sourceFileName); // 保存文件到物理路径
FileUtils.copyFile(uploadedFile, filePath); //以下是保存在文档库
ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY);
ServiceContext serviceContext = ServiceContextFactory.getInstance(actionRequest);
String contentType = MimeTypesUtil.getContentType(uploadedFile);
InputStream inputStream = new FileInputStream(uploadedFile);
//要保存的文档库路径
Folder folderName = DLAppLocalServiceUtil.getFolder(parentRepositoryId,
parentFolderId,
"Folder Name");
long folderId = folderName.getFolderId();
long repositoryId = folderName.getRepositoryId();
//保存到文档库
FileEntry fileEntry = DLAppLocalServiceUtil.addFileEntry(themeDisplay.getUserId(),
repositoryId,
folderId,
uploadedFile.getName(),
contentType,
"File Name",
"description",
"changeLog",
inputStream,
uploadedFile.length(),
serviceContext);
}
}

关于文档库参数说明的解释:
http://blog.csdn.net/lan861698789/article/details/8122203

和实体类一起保存文件的Demo

public void addYourEntity(ActionRequest request, ActionResponse response)
throws Exception { UploadPortletRequest uploadPortletRequest =
PortalUtil.getUploadPortletRequest(request); long artistId = ParamUtil.getLong(uploadPortletRequest, "artistId");
String name = ParamUtil.getString(uploadPortletRequest, "name");
int year = ParamUtil.getInteger(uploadPortletRequest, "year");
//更多的实体类信息
...... InputStream inputStream = uploadPortletRequest.getFileAsStream("file");
ServiceContext serviceContext = ServiceContextFactory.getInstance(
YourEntity.class.getName(), uploadPortletRequest); try {
YourEntityServiceUtil.addYourEntity(
artistId, name, year, inputStream, serviceContext); SessionMessages.add(request, "YourEntityAdded"); String redirect = ParamUtil.getString(
uploadPortletRequest, "redirect"); response.sendRedirect(redirect);
}
catch (Exception e) {
SessionErrors.add(request, e.getClass().getName()); if (e instanceof YourEntityNameException ||
e instanceof PrincipalException) { response.setRenderParameter(
"jspPage", "/html/YourEntitys/edit_YourEntity.jsp");
}
else {
response.setRenderParameter("jspPage", "/html/error.jsp");
}
}
}
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