我正在尝试实现一个功能，我必须使用PrimeFaces p：media标签动态生成流内容 .
要求是此内容可以是需要在p：media标签中显示/流式传输的pdf或视频文件 .
现在，我可以成功动态流式传输pdf内容类型，并在浏览器中显示pdf文档 .
但是对于相同的代码，我无法打开视频流 . 如果选择的类型是视频（例如avi，其中播放器是Windows，媒体播放器打开，说“打开媒体”然后）没有任何反应 . flv视频相同（未在浏览器中加载电影）
我还提供了日志消息，显示流不为空，并且正确设置了mime类型 .
我已经浏览了p：media标签的文档，并提出了一段代码，如下所示：
这是我写的示例代码：
XHTML：
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:fn="http://java.sun.com/jsp/jstl/functions"
template="/resources/templates/contentTemplate.xhtml>
<ui:define name="linked-content">
<p:panelGrid style="width: 100%; height: 100%" id="masterPanel">
<p:row>
<p:column>
<p:media value="#{mediaViewManagedBean.media}" style="width: 100%; height: 100%" player="#{mediaViewManagedBean.player}" rendered="#{not empty mediaViewManagedBean.media}">
</p:media>
</p:column>
</p:row>
</p:panelGrid>
</ui:define>
托管 beans ：
package [redacted];
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.ResourceBundle;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import org.apache.commons.io.FilenameUtils;
import org.[redacted].core.domain.model.MediaMaster;
import org.[redacted].web.context.constants.ApplicationConstant;
import org.[redacted].web.context.util.AbstractManagedBeanSupport;
import org.[redacted].web.context.util.FacesUtils;
import org.primefaces.model.DefaultStreamedContent;
import org.primefaces.model.StreamedContent;
import org.springframework.util.StringUtils;
/**
*
* @author Saikat Mukherjee <saikat44@gmail.com>
*/
@ManagedBean
@RequestScoped
public class MediaViewManagedBean extends AbstractManagedBeanSupport<MediaViewManagedBean> {
private StreamedContent media;
private String player;
private static transient ResourceBundle mimeTypeResourceBundle;
private static final String[] playerTypeWindows = {"asx", "asf", "avi", "wma", "wmv"};
private static final String[] playerTypeQT = {"aif", "aiff", "aac", "au", "bmp", "gsm", "mov", "mid", "midi", "mpg", "mpeg", "mp4", "m4a", "psd", "qt", "qtif", "qif", "qti", "snd", "tif", "tiff", "wav", "3g2", "3pg"};
private static final String[] playerTypeFlash = {"flv", "mp3", "swf"};
private static final String[] playerTypeReal = {"ra", "ram", "rm", "rpm", "rv", "smi", "smil"};
private static final String[] playerTypePDF = {"pdf"};
public MediaViewManagedBean() {
super(MediaViewManagedBean.class);
}
@PostConstruct
@Override
public void initMetaData() {
try {
loggingService.debug("initMetaData called");
mimeTypeResourceBundle = ResourceBundle.getBundle(ApplicationConstant.PROP_BUNDLE_MIME_TYPE);
/**
* Generate a streamed media content from the media in question
*/
MediaMaster targetMedia = (MediaMaster) FacesUtils.getHttpSession(false).getAttribute(ApplicationConstant.REQ_PARAM_TARGET_MEDIA_MASTER);
if (targetMedia == null) {
loggingService.info("Something is not right, the target media is null, will not generate a streamed content");
} else {
String mediaLink = targetMedia.getMediaLink();
loggingService.info("target media has got a target of [" + mediaLink + "]");
if (StringUtils.isEmpty(mediaLink)) {
loggingService.info("mediaLink is empty, no streamed content to be generated");
} else {
File targetFile = new File(mediaLink);
if (targetFile.exists() && !targetFile.isDirectory()) {
loggingService.info("we will now generate a streamed content for the file [" + mediaLink + "]");
InputStream targetFileInputStream = new BufferedInputStream(new FileInputStream(targetFile));
//InputStream targetFileInputStream = this.getClass().getResourceAsStream(mediaLink);
loggingService.info("got a not null bytestream");
String fileExtension = FilenameUtils.getExtension(targetFile.getName());
String mimeType = mimeTypeResourceBundle.getString(fileExtension);
loggingService.info("file extenstion [" + fileExtension + "] , mimeType [" + mimeType + "]");
media = new DefaultStreamedContent(targetFileInputStream, mimeType);
generatePlayerType(fileExtension);
} else {
loggingService.info("target file [" + mediaLink + "] does not exist, will not generate a streamed content");
}
}
}
} catch (Exception e) {
loggingService.error("Internal error:", e);
processException(e);
}
}
public void resetForm() {
initMetaData();
}
private void generatePlayerType(String fileExtension) {
if (Arrays.asList(playerTypeWindows).contains(fileExtension)) {
player = "windows";
}
if (Arrays.asList(playerTypeQT).contains(fileExtension)) {
player = "quicktime";
}
if (Arrays.asList(playerTypeFlash).contains(fileExtension)) {
player = "flash";
}
if (Arrays.asList(playerTypeReal).contains(fileExtension)) {
player = "real";
}
if (Arrays.asList(playerTypePDF).contains(fileExtension)) {
player = "pdf";
}
loggingService.info("selected player type for fileExtension[" + fileExtension + "] is [" + player + "]");
}
public StreamedContent getMedia() {
//initMetaData();
return media;
}
public void setMedia(StreamedContent media) {
this.media = media;
}
public String getPlayer() {
return player;
}
public void setPlayer(String player) {
this.player = player;
}
}
生成的日志：
61681 [http-nio-8084-exec-12] DEBUG org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - initMetaData called
61681 [http-nio-8084-exec-12] INFO org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - target media has got a target of [C:\Users\[redacted]\Desktop\Temp\A_[2009].avi]
61751 [http-nio-8084-exec-12] INFO org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - we will now generate a streamed content for the file [C:\Users\[redacted]\Desktop\Temp\A_[2009].avi]
61752 [http-nio-8084-exec-12] INFO org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - got a not null bytestream
61752 [http-nio-8084-exec-12] INFO org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - file extenstion [avi] , mimeType [video/x-msvideo,application/x-troff-msvideo,video/avi,video/msvideo]
61753 [http-nio-8084-exec-12] INFO org.[redacted].web.view.admin.managedbeans.MediaViewManagedBean - selected player type for fileExtension[avi] is [windows]
有人可以建议如何使视频流可运行 .
PS：视频文件未损坏 .
Primefaces 5.0