salesforce开发之 文件系统浅析

<apex:page controller="FileUploadController" showHeader="false" sidebar="false" >
 <apex:form >
 <apex:pagemessages />
 <apex:pageBlock >
 <apex:pageBlockSection columns="4">
 <apex:inputFile value="{!csvFileBody}" filename="{!csvAsString}"/>
 <apex:commandButton value="Import file" action="{!importFile}"/>
 </apex:pageBlockSection>
 </apex:pageBlock>
 </apex:form>
</apex:page>
public class FileUploadController {
 public transient Blob csvFileBody{get;set;}
 public String csvAsString{get;set;}
 public String oppId{get;set;}
 public FileUploadController(){
 oppId = ApexPages.currentPage().getParameters().get('oppId');
}
 public void importFile(){
 ContentVersion contentVersion_1 = new ContentVersion();
 contentVersion_1.Title = csvAsString;
 contentVersion_1.PathOnClient = csvAsString;
 contentVersion_1.VersionData = csvFileBody;
 insert contentVersion_1;
 List<ContentVersion> list_version = SELECT contentdocumentid,ownerid FROM ContentVersion WHERE id =: contentVersion_1.Id;
 ContentDocumentLink link = new ContentDocumentLink();
 link.ContentDocumentId = list_version0.contentdocumentid;
 link.LinkedEntityId = oppId;
 link.ShareType = 'V';
 insert link;
}
}

Lighting Aura:
<div>
 <center>
 <aura:iteration items="{!v.uploadedFiles}" var="item" indexVar="index">
 <tr class="slds-hint-parent">
 <th data-label="" scope="row">
 <ui:outputText value="{!item.name}"></ui:outputText>
 </th>
 </tr>
 </aura:iteration>
 <lightning:fileUpload label="" multiple="true"   
 accept="{!v.accept}" recordId="{!v.recordId}"   
 onuploadfinished="{!c.UploadFinished}" /> 
 </center>
</div>
UploadFinished : function(component, event, helper) {  
 var recordId = component.get("v.recordId");
 var fNameList=event.getParam("files");  
 var toastEvent = $A.get("e.force:showToast");
}   

Inert ContentVersion后，生成ContentDocumentLink与对象链接起来
 public static void generateContentFile(string objectId, String fileName, Blob contentData) {
 ContentVersion conVer = new ContentVersion();
 conVer.ContentLocation = 'S';
 conVer.PathOnClient = fileName;
 conVer.Title = fileName;
 conVer.VersionData = contentData;
 insert conVer;
 Id conDoc = [SELECT ContentDocumentId FROM ContentVersion WHERE Id = :conVer.Id].ContentDocumentId;
 ContentDocumentLink conDocLink = New ContentDocumentLink();
 conDocLink.LinkedEntityId = objectId;
 conDocLink.ContentDocumentId = conDoc;
 conDocLink.shareType = 'V';
 insert conDocLink;
    }

trigger ContentVersionTrigger on ContentVersion (after insert) 
{
 if (trigger.isAfter && trigger.isInsert) 
    {
 List<ContentDistribution> itemList = new List<ContentDistribution>();
 for (ContentVersion cv : trigger.new) 
        {
 ContentDistribution newItem = new ContentDistribution();
 newItem.Name = cv.Title;
 newItem.ContentVersionId = cv.Id;
 newItem.PreferencesAllowViewInBrowser= true;
 newItem.PreferencesLinkLatestVersion=true;
 newItem.PreferencesNotifyOnVisit=false;
 newItem.PreferencesPasswordRequired=false;
 newItem.PreferencesAllowOriginalDownload= true;
 itemList.add(newItem);
        }
 INSERT itemList;
    }
}   

 public static ContentDistribution createContentDistribution(Id contentVersionId, String ContentName, Boolean ifDownLoad) {
 ContentDistribution newDist = new ContentDistribution();
 newDist.ContentVersionId = id.valueOf(contentVersionId);
 newDist.Name = ContentName;
 newDist.PreferencesAllowViewInBrowser = true;
 newDist.PreferencesLinkLatestVersion = true;
 newDist.PreferencesNotifyOnVisit = false;
 newDist.PreferencesPasswordRequired = false;
 newDist.PreferencesAllowPDFDownload = false;
 newDist.PreferencesAllowOriginalDownload = ifDownLoad;
 return newDist;
 ContentDistribution newItem = createContentDistribution(cv.id,cv.Title,true);
 insertList.add(newItem);
 distributionList = [SELECT Id,DistributionPublicUrl, PdfDownloadUrl, ContentDownloadUrl,ContentVersionId,PreferencesAllowOriginalDownload FROM ContentDistribution WHERE ContentVersionId IN: cvIdList];