Liferay7 BPM Portal Development 28:portlet file upload, and entity class synchronization update upload

Seize the core--Wang Xin

The core of Liferay file upload is the use of the Uploadportletrequest class

Inheritance relationship
Java.lang.Object
Extended Byjavax.servlet.ServletRequestWrapper
Extended Byjavax.servlet.http.HttpServletRequestWrapper
Extended Bycom.liferay.util.servlet.UploadPortletRequest

To implement a relationship:
Implemented Interfaces:

• Javax.servlet.http.HttpServletRequest
• Javax.servlet.ServletRequest

Single File Upload

JSP code

<%@ 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:actionurlname= "Upload"var= "Uploadfileurl"></Portlet:actionurl> <Aui:formAction= "<%= uploadfileurl%>"enctype= "Multipart/form-data"Method= "POST">     <Aui:inputtype= "File"name= "FileUpload" />        <Aui:buttonname= "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 classRelatedfilesportlet extends Mvcportlet {PrivateFinalStatic intONE_GB =1073741824; PrivateFinalStaticString BaseDir ="/tmp/uploaded/"; PrivateFinalStaticString fileinputname ="FileUpload";  Public voidUpload (actionrequest request, actionresponse response) throws Exception {uploadportletrequest UPL Oadrequest=portalutil.getuploadportletrequest (Request); LongsizeInBytes =uploadrequest.getsize (fileinputname); if(Uploadrequest.getsize (fileinputname) = =0) {            Throw NewException ("the file is empty!"); }         //obtaining a File object from UploadrequestFile UploadedFile =Uploadrequest.getfile (fileinputname); String sourceFileName=Uploadrequest.getfilename (fileinputname); //directory where files are storedFile folder =NewFile (BaseDir); //Make available space checks on the current directory        if(Folder.getusablespace () <ONE_GB) {            Throw NewException ("Insufficient space 1gb!"); }         //the final file pathFile FilePath =NewFile (Folder.getabsolutepath () + File.separator +sourceFileName); //save file to physical pathfileutils.copyfile (UploadedFile, FilePath); //The following are saved in the document libraryThemedisplay Themedisplay =(Themedisplay) Actionrequest.getattribute (Webkeys.theme_display); Servicecontext Servicecontext=servicecontextfactory.getinstance (actionrequest); String ContentType=Mimetypesutil.getcontenttype (UploadedFile); InputStream InputStream=NewFileInputStream (UploadedFile); //the document library path to saveFolder FolderName =Dlapplocalserviceutil.getfolder (Parentrepositoryid, Paren Tfolderid,"Folder Name"); LongFolderID =Foldername.getfolderid (); LongRepositoryid =Foldername.getrepositoryid (); //Save to document libraryFileentry Fileentry =Dlapplocalserviceutil.addfileentry (Themedisplay.getuserid (),                                                                  Repositoryid, FolderID,                                                                  Uploadedfile.getname (), ContentType,"File Name",                                                                  "Description",                                                                  "ChangeLog", InputStream, Uploadedfile.length (), service    Context); }}

Explanation of document library parameter descriptions:
http://blog.csdn.net/lan861698789/article/details/8122203

The demo that saves the file with the entity class

 Public voidaddyourentity (actionrequest request, actionresponse response) throws Exception {Uploadportletrequest Uploadpor Tletrequest=portalutil.getuploadportletrequest (Request); LongArtistID = Paramutil.getlong (Uploadportletrequest,"ArtistID"); String name= Paramutil.getstring (Uploadportletrequest,"name"); intYear = Paramutil.getinteger (Uploadportletrequest," Year"); //more entity-class information    ...... 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"); }    }}

Liferay7 BPM Portal Development 28:portlet file upload, and entity class synchronization update upload