我目前正在重构一个大型的Swing应用程序，以便从XmlBeanFactory中获取一些对象。
许多不同的类都可以使用它，我想知道共享此beanFactory的最佳方法是什么。
我应该创建一个Singleton来共享此XmlBeanFactory吗？
Singleton类
{
公共静态XmlBeanFactory getBeanFactory（）
{（...）
}
}
还是我应该在对象中添加一些设置器（丑陋的：它添加了一些缺陷...）
另一个解决方案？
谢谢
最佳答案
使用静态单例是一个好的方法。我还没有找到更好的解决方案。这有点令人不满意，因为在使用单例之前必须先使用接线文件对其进行初始化，否则将导致bean创建异常，这是要记住的另一件事。
public final class SpringUtil {
private static ApplicationContext context = null;
private static Set<String> alreadyLoaded = new HashSet<String>();
/**
* Sets the spring context based off multiple wiring files. The files must exist on the classpath to be found.
* Consider using "import resource="wiring.xml" in a single wiring file to reference other wiring files instead.
* Note that this will destroy all previous existing wiring contexts.
*
* @param wiringFiles an array of spring wiring files
*/
public static void setContext(String... wiringFiles) {
alreadyLoaded.clear();
alreadyLoaded.addAll(Arrays.asList(wiringFiles));
context = new ClassPathXmlApplicationContext(wiringFiles);
}
/**
* Adds more beans to the spring context givin an array of wiring files. The files must exist on the classpath to be
* found.
*
* @param addFiles an array of spring wiring files
*/
public static void addContext(String... addFiles) {
if (context == null) {
setContext(addFiles);
return;
}
Set<String> notAlreadyLoaded = new HashSet<String>();
for (String target : addFiles) {
if (!alreadyLoaded.contains(target)) {
notAlreadyLoaded.add(target);
}
}
if (notAlreadyLoaded.size() > 0) {
alreadyLoaded.addAll(notAlreadyLoaded);
context = new ClassPathXmlApplicationContext(notAlreadyLoaded.toArray(new String[] {}), context);
}
}
/**
* Gets the current spring context for direct access.
*
* @return the current spring context
*/
public static ApplicationContext getContext() {
return context;
}
/**
* Gets a bean from the current spring context.
*
* @param beanName the name of the bean to be returned
* @return the bean, or throws a RuntimeException if not found.
*/
public static Object getBean(final String beanName) {
if (context == null) {
throw new RuntimeException("Context has not been loaded.");
}
return getContext().getBean(beanName);
}
/**
* Sets this singleton back to an uninitialized state, meaning it does not have any spring context and
* {@link #getContext()} will return null. Note: this is for unit testing only and may be removed at any time.
*/
public static void reset() {
alreadyLoaded.clear();
context = null;
}
}
使用springframework的较新版本，您可以使用泛型使getBean（）返回比Object更特定的类，这样您就不必在获取bean之后对其进行转换。