Question

显示图形图像时遇到问题。我想用复选框选择图像。图像路径从数据库中撤消。这是一个显示代码：

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
            xmlns:h="http://xmlns.jcp.org/jsf/html"
            xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
            xmlns:p="http://primefaces.org/ui"
            xmlns:f="http://xmlns.jcp.org/jsf/core">
<p:outputPanel autoUpdate="true" rendered="#{loggedUser.isLogged() == true}">
    <h:head>
    </h:head>
    <h:form>
        <p:growl autoUpdate="true" sticky="true" id="growl" showDetail="true" />
        <ui:repeat value="#{orderMB.photoList}" var="photo">
            <p:selectBooleanCheckbox value="#{orderMB.selection[photo]}" />
            <p:graphicImage value="#{photo.toStreamedContent()}"/>
        </ui:repeat>
    </h:form>
</p:outputPanel>

这是一个OrderMB：

public class UserOrderMB {

@Inject
LoggedUser loggedUser;

private List<Photo> photoList;

private Map<Photo, Boolean> selection;

@PostConstruct
public void init() {
    photoList = loggedUser.getPhotoList();
    selection = new HashMap<>(); // No need to prefill it!
}

public List<Photo> getPhotoList() {
    return photoList;
}

public void setPhotoList(List<Photo> photoList) {
    this.photoList = photoList;
}

public LoggedUser getLoggedUser() {
    return loggedUser;
}

public void setLoggedUser(LoggedUser loggedUser) {
    this.loggedUser = loggedUser;
}


public Map<Photo, Boolean> getSelection() {
    return selection;
}

public void setSelection(Map<Photo, Boolean> selection) {
    this.selection = selection;
}

}

将照片更改为StreamedContent的代码：

   public StreamedContent toStreamedContent(){
    StreamedContent sc = new DefaultStreamedContent();
   try {
      sc  = new DefaultStreamedContent(new FileInputStream(new File(getPhotoPath())), "image/png");
   }
   catch (FileNotFoundException e){
       e.printStackTrace();
   }
   return sc;
}

我确信photoList有内容，并且照片会被更改，并且位置很好。该网站只显示没有图像的复选框。这不是重复，因为我不在数据库中但在驱动器上保存图像。我只保留数据库中的图像路径。

Primefaces p：不显示graphicImage

0 个答案: