Spring boot 打jar包启动后无法正常扫描class的问题（Idea直接运行正常）

import com.google.common.collect.Lists;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
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 java.io.IOException;
import java.util.Collections;
import java.util.List;

/**
 * 注意，如果是jar包启动的，需要打包的时候加上<addDefaultImplementationEntries>true</addDefaultImplementationEntries>
 */
@Slf4j
public class ClassUtil {

    public static List<Class<?>> getAllClasses(Class<?> c) {
        String packageName = c.getPackage().getName();
        return getClasses(packageName);
    }

    /**
     * 根据包名查询出所有子类信息
     *
     */
    private static List<Class<?>> getClasses(String packageName) {
        ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
        final String RESOURCE_PATTERN = "/**/*.class";
        // 扫描的包名
        List<Class<?>> classCache = Lists.newArrayList();
        try {
            String pattern = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + ClassUtils.convertClassNameToResourcePath(packageName)
                    + RESOURCE_PATTERN;
            Resource[] resources = resourcePatternResolver.getResources(pattern);
            MetadataReaderFactory readerFactory = new CachingMetadataReaderFactory(resourcePatternResolver);
            for (Resource resource : resources) {
                if (resource.isReadable()) {
                    MetadataReader reader = readerFactory.getMetadataReader(resource);
                    //扫描到的class
                    String className = reader.getClassMetadata().getClassName();
                    Class<?> clazz = Class.forName(className);
                    classCache.add(clazz);
                }
            }
            return classCache;
        } catch (ClassNotFoundException | IOException e) {
            log.error("读取class失败", e);
        }
        return Collections.emptyList();
    }


}