import org.opensaml.core.config.InitializationException; //导入依赖的package包/类
private MetadataResolver initializeMetadata() {
    try {
        InitializationService.initialize();
        String content = new MetadataFactory().defaultMetadata();
        StringBackedMetadataResolver metadataResolver = new StringBackedMetadataResolver(content);
        BasicParserPool pool = new BasicParserPool();
        pool.initialize();
        metadataResolver.setParserPool(pool);
        metadataResolver.setId("testResolver");
        metadataResolver.setResolveViaPredicatesOnly(true);
        metadataResolver.setRequireValidMetadata(true);
        EntityDescriptorCriterionPredicateRegistry registry = new EntityDescriptorCriterionPredicateRegistry();
        registry.register(EntitiesDescriptorNameCriterion.class, EntitiesDescriptorNamePredicate.class);
        metadataResolver.setCriterionPredicateRegistry(registry);
        metadataResolver.initialize();
        return metadataResolver;
    } catch (ComponentInitializationException | InitializationException e) {
        throw propagate(e);
    }
}
 

import org.opensaml.core.config.InitializationException; //导入依赖的package包/类
/**
 * Initializes the OpenSAML library modules, if not initialized yet.
 *
 * @throws SSOException if an error occurs when bootstrapping the OpenSAML2 library
 */
public static void doBootstrap() throws SSOException {
    try {
        if (!isBootstrapped) {
            InitializationService.initialize();
            isBootstrapped = true;
        }
    } catch (InitializationException e) {
        throw new SSOException("Error in bootstrapping the OpenSAML library", e);
    }
}