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

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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 = 1073741824;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) == 0) {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");}}
}