在Java中,getResources()
方法用于從類加載器中獲取資源。為了優化資源獲取,可以采取以下策略:
ConcurrentHashMap
來存儲緩存的資源對象。private static final Map<String, Resource> resourceCache = new ConcurrentHashMap<>();
public static Resource getResource(String resourcePath) {
return resourceCache.computeIfAbsent(resourcePath, key -> {
try {
return classLoader.getResource(key);
} catch (NullPointerException e) {
// 資源未找到
return null;
}
});
}
public static void getResources(String[] resourceNames, Consumer<Resource> consumer) {
Arrays.stream(resourceNames)
.map(this::getResource)
.filter(Objects::nonNull)
.forEach(consumer);
}
private static final ThreadLocal<ClassLoader> threadClassLoader = new InheritableThreadLocal<>();
public static void setClassLoader(ClassLoader classLoader) {
threadClassLoader.set(classLoader);
}
public static ClassLoader getClassLoader() {
return threadClassLoader.get();
}
public static Resource getResource(String resourcePath) {
ClassLoader classLoader = getClassLoader();
if (classLoader == null) {
classLoader = ClassLoader.getSystemClassLoader();
}
return classLoader.getResource(resourcePath);
}
通過以上策略,你可以優化Java中getResources()
方法對資源的獲取,提高應用程序的性能。