Spring--ClassPathXmlApplicationContext

public class ClassPathXmlApplicationContext extends AbstractXmlApplicationContext {

	private Resource[] configResources;

	/**
	 * Create a new ClassPathXmlApplicationContext for bean-style configuration.
	 * @see #setConfigLocation
	 * @see #setConfigLocations
	 * @see #afterPropertiesSet()
	 */
	public ClassPathXmlApplicationContext() {
	}

	/**
	 * Create a new ClassPathXmlApplicationContext for bean-style configuration.
	 * @param parent the parent context
	 * @see #setConfigLocation
	 * @see #setConfigLocations
	 * @see #afterPropertiesSet()
	 */
	public ClassPathXmlApplicationContext(ApplicationContext parent) {
		super(parent);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext, loading the definitions
	 * from the given XML file and automatically refreshing the context.
	 * @param configLocation resource location
	 * @throws BeansException if context creation failed
	 */
	//下载一个定义好的xml,自动刷新上下文
	public ClassPathXmlApplicationContext(String configLocation) throws BeansException {
		this(new String[] {configLocation}, true, null);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext, loading the definitions
	 * from the given XML files and automatically refreshing the context.
	 * @param configLocations array of resource locations
	 * @throws BeansException if context creation failed
	 */
	//下载一个定义好的xml,自动刷新上下文
	public ClassPathXmlApplicationContext(String... configLocations) throws BeansException {
		this(configLocations, true, null);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext with the given parent,
	 * loading the definitions from the given XML files and automatically
	 * refreshing the context.
	 * @param configLocations array of resource locations
	 * @param parent the parent context
	 * @throws BeansException if context creation failed
	 */
	public ClassPathXmlApplicationContext(String[] configLocations, ApplicationContext parent) throws BeansException {
		this(configLocations, true, parent);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext, loading the definitions
	 * from the given XML files.
	 * @param configLocations array of resource locations
	 * @param refresh whether to automatically refresh the context,
	 * loading all bean definitions and creating all singletons.
	 * Alternatively, call refresh manually after further configuring the context.
	 * @throws BeansException if context creation failed
	 * @see #refresh()
	 */
	public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh) throws BeansException {
		this(configLocations, refresh, null);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext with the given parent,
	 * loading the definitions from the given XML files.
	 * @param configLocations array of resource locations
	 * @param refresh whether to automatically refresh the context,
	 * loading all bean definitions and creating all singletons.
	 * Alternatively, call refresh manually after further configuring the context.
	 * @param parent the parent context
	 * @throws BeansException if context creation failed
	 * @see #refresh()
	 */
	public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh, ApplicationContext parent)
			throws BeansException {

		super(parent);
		setConfigLocations(configLocations);
		if (refresh) {
			refresh();
		}
	}

	/**
	 * Create a new ClassPathXmlApplicationContext, loading the definitions
	 * from the given XML file and automatically refreshing the context.
	 * <p>This is a convenience method to load class path resources relative to a
	 * given Class. For full flexibility, consider using a GenericApplicationContext
	 * with an XmlBeanDefinitionReader and a ClassPathResource argument.
	 * @param path relative (or absolute) path within the class path
	 * @param clazz the class to load resources with (basis for the given paths)
	 * @throws BeansException if context creation failed
	 * @see org.springframework.core.io.ClassPathResource#ClassPathResource(String, Class)
	 * @see org.springframework.context.support.GenericApplicationContext
	 * @see org.springframework.beans.factory.xml.XmlBeanDefinitionReader
	 */
	public ClassPathXmlApplicationContext(String path, Class<?> clazz) throws BeansException {
		this(new String[] {path}, clazz);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext, loading the definitions
	 * from the given XML files and automatically refreshing the context.
	 * @param paths array of relative (or absolute) paths within the class path
	 * @param clazz the class to load resources with (basis for the given paths)
	 * @throws BeansException if context creation failed
	 * @see org.springframework.core.io.ClassPathResource#ClassPathResource(String, Class)
	 * @see org.springframework.context.support.GenericApplicationContext
	 * @see org.springframework.beans.factory.xml.XmlBeanDefinitionReader
	 */
	public ClassPathXmlApplicationContext(String[] paths, Class<?> clazz) throws BeansException {
		this(paths, clazz, null);
	}

	/**
	 * Create a new ClassPathXmlApplicationContext with the given parent,
	 * loading the definitions from the given XML files and automatically
	 * refreshing the context.
	 * @param paths array of relative (or absolute) paths within the class path
	 * @param clazz the class to load resources with (basis for the given paths)
	 * @param parent the parent context
	 * @throws BeansException if context creation failed
	 * @see org.springframework.core.io.ClassPathResource#ClassPathResource(String, Class)
	 * @see org.springframework.context.support.GenericApplicationContext
	 * @see org.springframework.beans.factory.xml.XmlBeanDefinitionReader
	 */
	public ClassPathXmlApplicationContext(String[] paths, Class<?> clazz, ApplicationContext parent)
			throws BeansException {

		super(parent);
		Assert.notNull(paths, "Path array must not be null");
		Assert.notNull(clazz, "Class argument must not be null");
		this.configResources = new Resource[paths.length];
		for (int i = 0; i < paths.length; i++) {
			this.configResources[i] = new ClassPathResource(paths[i], clazz);
		}
		refresh();
	}

	@Override
	protected Resource[] getConfigResources() {
		return this.configResources;
	}

}