Created
January 28, 2017 18:40
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Show PDF Files With PrimeFaces
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| import java.io.File; | |
| import java.io.FileInputStream; | |
| import java.io.FileNotFoundException; | |
| import java.io.InputStream; | |
| import java.util.ArrayList; | |
| import java.util.List; | |
| import javax.annotation.PostConstruct; | |
| import javax.faces.bean.ApplicationScoped; | |
| import javax.faces.bean.ManagedBean; | |
| import org.primefaces.event.SelectEvent; | |
| import org.primefaces.model.DefaultStreamedContent; | |
| import org.primefaces.model.StreamedContent; | |
| @ApplicationScoped | |
| @ManagedBean | |
| public class FormView { | |
| private StreamedContent streamedContent; | |
| private List<MyFile> files = new ArrayList<MyFile>(); | |
| private String selectedFileName; | |
| @PostConstruct | |
| public void init() { | |
| MyFile myFile1 = new MyFile(1, "1.pdf"); | |
| MyFile myFile2 = new MyFile(2, "2.pdf"); | |
| files.add(myFile1); | |
| files.add(myFile2); | |
| } | |
| public List<MyFile> getFiles() { | |
| return files; | |
| } | |
| public String getSelectedFileName() { | |
| return selectedFileName; | |
| } | |
| public void setSelectedFileName(String selectedFileName) { | |
| this.selectedFileName = selectedFileName; | |
| } | |
| public StreamedContent getStreamedContent() { | |
| return streamedContent; | |
| } | |
| public void setStreamedContent(StreamedContent streamedContent) { | |
| this.streamedContent = streamedContent; | |
| } | |
| public void onRowSelect(SelectEvent event) { | |
| String fileName = ((MyFile) event.getObject()).getName(); | |
| // we use this for refill the stream | |
| selectedFileName = fileName; | |
| createStream(fileName); | |
| } | |
| private StreamedContent createStream(String fileName) { | |
| streamedContent = new DefaultStreamedContent(getData(fileName), "application/pdf", "downloaded_" + fileName); | |
| return streamedContent; | |
| } | |
| private InputStream getData(String fileName) { | |
| // pdf files under src\main\resources | |
| File file = new File(System.getProperty("user.dir") + "\\src\\main\\resources\\" + fileName); | |
| InputStream is = null; | |
| try { | |
| is = new FileInputStream(file); | |
| } catch (FileNotFoundException e) { | |
| e.printStackTrace(); | |
| } | |
| return is; | |
| } | |
| // refill the stream | |
| public void refreshStream() { | |
| createStream(selectedFileName); | |
| } | |
| public String generateRandomIdForNotCaching() { | |
| return java.util.UUID.randomUUID().toString(); | |
| } | |
| } |
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| <?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" | |
| "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" | |
| xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:p="http://primefaces.org/ui"> | |
| <h:head> | |
| </h:head> | |
| <h:body> | |
| <h2>Page No.1</h2> | |
| <p:dataTable var="file" value="#{formView.files}" selectionMode="single" rowKey="#{file.id}" style="width:50%"> | |
| <p:ajax event="rowSelect" listener="#{formView.onRowSelect}" oncomplete="PF('dlg1').show()" update=":form" /> | |
| <p:column headerText="Name"> | |
| <h:outputText value="#{file.name}" /> | |
| </p:column> | |
| </p:dataTable> | |
| <p:dialog header="Dialog" widgetVar="dlg1" modal="false"> | |
| <h:form id="form"> | |
| <p:messages id="msgs" /> | |
| <h:panelGrid columns="1" cellpadding="5"> | |
| <p:media value="#{formView.streamedContent}" player="pdf" width="600px" height="300px"> | |
| <f:param name="id" value="#{formView.generateRandomIdForNotCaching()}" /> | |
| </p:media> | |
| <p:commandButton value="download" ajax="false" onclick="PrimeFaces.monitorDownload(startOffer, stopOffer);"> | |
| <p:fileDownload value="#{formView.streamedContent}" /> | |
| </p:commandButton> | |
| </h:panelGrid> | |
| </h:form> | |
| </p:dialog> | |
| <h:form> | |
| <p:remoteCommand name="refreshStreamOffer" actionListener="#{formView.refreshStream()}" /> | |
| </h:form> | |
| <script type="text/javascript"> | |
| function startOffer() { | |
| refreshStreamOffer(); | |
| } | |
| function stopOffer() { | |
| refreshStreamOffer(); | |
| } | |
| </script> | |
| </h:body> | |
| </html> |
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| public class MyFile { | |
| private Integer id; | |
| private String name; | |
| public MyFile(Integer id, String name) { | |
| this.id = id; | |
| this.name = name; | |
| } | |
| public Integer getId() { | |
| return id; | |
| } | |
| public void setId(Integer id) { | |
| this.id = id; | |
| } | |
| public String getName() { | |
| return name; | |
| } | |
| public void setName(String name) { | |
| this.name = name; | |
| } | |
| } |
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