JSF2中的显示清单属性

Question

在纯粹的 JSF2.0应用程序中访问Manifest属性（来自/META-INF/Manifest.mf）的最佳方式是什么？

Answer 1

THX到麦克道尔的上述建议，改进的init()变为：

@PostConstruct 
public void init() { 
    try { 
     InputStream is = FacesContext.getCurrentInstance().getExternalContext().getResourceAsStream("/META-INF/MANIFEST.MF"); 
     manifest = new Manifest(); 
     manifest.read(is); 
    } catch (IOException ioe) { 
     logger.error("Unable to read the Manifest file from classpath.", ioe); 
    } 
} 

Answer 2

以下似乎工作：

创建ManagedBean：

@ManagedBean(name = "cic") 
@ApplicationScoped 
public class ConfigurationInformationController { 
    private static final Logger logger = LoggerFactory.getLogger(ConfigurationInformationController.class.getName()); 
    private Manifest manifest = null; 
    public Manifest getManifest() { 
     return manifest; 
    } 
    @PostConstruct 
    public void init() { 
     File manifestFile = null; 
     try { 
      String home = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/"); 
      manifestFile = new File(home, "META-INF/MANIFEST.MF"); 
      manifest = new Manifest(); 
      manifest.read(new FileInputStream(manifestFile)); 
     } catch (IOException ioe) { 
      logger.error("Unable to read the Manifest file from '"+manifestFile.getAbsolutePath()+"'",ioe); 
     } 
    } 
} 

在Facelets的页面，从那里调用属性...

<h:outputLabel for="Build-BuildTimestamp" value="Build Timestamp:"/> 
    <h:outputText id="Build-BuildTimestamp" value="#{cic.manifest.mainAttributes.getValue('Build-BuildTimestamp')}"/>