java查找指定包名下所有类

使用的是Spring提供的工具：ClassPathScanningCandidateComponentProvider

获取包下所有类（包含子包），匹配任何类

    public static List<Class<?>> getClasssFromPackage(String... packges)
    {
        final List<Class<?>> clazzs = new ArrayList<>();
        for (String packge : packges)
        {
            ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
             provider.addIncludeFilter(new TypeFilter()
            {
                
                @Override
                public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory) throws IOException
                {
                    
                    String className = metadataReader.getClassMetadata().getClassName();
                    try
                    {
                        Class<?> clazz = Class.forName(className);
                        clazzs.add(clazz);
                    } catch (ClassNotFoundException e)
                    {
                        e.printStackTrace();
                    }
                    
                    return true;
                }
            });
            provider.findCandidateComponents(packge);
        }
        return clazzs;
    }

带过滤的匹配

public static void main(String[] args) throws ClassNotFoundException 
{

    // true：默认TypeFilter生效，这种模式会查询出许多不符合你要求的class名
    // false：关闭默认TypeFilter
    ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(
            false);

    // 扫描带有自定义注解的类
    provider.addIncludeFilter(new AnnotationTypeFilter(ScanAnnotation.class));

    // 接口不会被扫描，其子类会被扫描出来
    provider.addIncludeFilter(new AssignableTypeFilter(ScanClassInterface.class));

    // Spring会将 .换成/  ("."-based package path to a "/"-based)
    // Spring拼接的扫描地址：classpath*:xxx/xxx/xxx/**/*.class
    // Set<BeanDefinition> scanList = provider.findCandidateComponents("com.p7.demo.scanclass");
    Set<BeanDefinition> scanList = provider.findCandidateComponents("*");

    for (BeanDefinition beanDefinition : scanList) 
    {
        System.out.println(beanDefinition.getBeanClassName());
    }

}