spring获取指定包下面的所有类
import java.io.IOException; import java.util.HashSet; import java.util.Set; import org.springframework.context.ResourceLoaderAware; import org.springframework.core.io.Resource; import org.springframework.core.io.ResourceLoader; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternUtils; import org.springframework.core.type.classreading.CachingMetadataReaderFactory; import org.springframework.core.type.classreading.MetadataReader; import org.springframework.core.type.classreading.MetadataReaderFactory; import org.springframework.util.ClassUtils; import org.springframework.util.SystemPropertyUtils; import xxxxx.mall.common.application.MallApplication; import xxxxx.common.assertion.Assert; /** * SPRING扫描包下面的类 * * @project common-utils * @fileName Scaner.java * @Description * @author light-zhang * @date 2019年5月5日 * @version 1.0.0 */ public class ScanSupport implements ResourceLoaderAware { /** * Spring容器注入 */ private ResourceLoader resourceLoader; private ResourcePatternResolver resolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader); private MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(resourceLoader); private static final String FULLTEXT_SACN_PACKAGE_PATH = "fulltext.scan.package"; /** * set注入对象 */ @Override public void setResourceLoader(ResourceLoader resourceLoader) { this.resourceLoader = resourceLoader; } /** * 利用spring提供的扫描包下面的类信息,再通过classfrom反射获得类信息 * * @param scanPath * @return * @throws IOException */ public Set<Class<?>> doScan(String scanPath) throws IOException { Set<Class<?>> classes = new HashSet<Class<?>>(); String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX .concat(ClassUtils.convertClassNameToResourcePath(SystemPropertyUtils.resolvePlaceholders(scanPath)) .concat("/**/*.class")); Resource[] resources = resolver.getResources(packageSearchPath); MetadataReader metadataReader = null; for (Resource resource : resources) { if (resource.isReadable()) { metadataReader = metadataReaderFactory.getMetadataReader(resource); try { if (metadataReader.getClassMetadata().isConcrete()) {// 当类型不是抽象类或接口在添加到集合 classes.add(Class.forName(metadataReader.getClassMetadata().getClassName())); } } catch (Exception e) { e.printStackTrace(); } } } return classes; } /** * 指定包下面的类信息 * * @return 多个类信息 */ public static Set<Class<?>> classInfos() { try { String scanPath = MallApplication.getApplicationContext().getEnvironment() .getProperty(FULLTEXT_SACN_PACKAGE_PATH); return new ScanSupport().doScan(scanPath); } catch (Exception e) { Assert.RuntimeException("扫描包类信息错误"); } return null; } }