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");

        }

    }

}