- **Builder Pattern** - `CopyOptions` for configuring bean copying operations with fluent API
- **Adapter Pattern** - Logging adapters (`JclLoggerAdapter`, `JulLoggerAdapter`) for different logging frameworks
- **Template Method** - Resource traversal utilities with customizable handlers
- **Utility Classes** - All core functionality exposed through static utility methods for easy access

### Performance Optimizations

    String JOB_TEMPLATE_TITLE_WEB = "job.template.title.web";

    /** The key of the configuration. e.g. File Crawler - {0} */
    String JOB_TEMPLATE_TITLE_FILE = "job.template.title.file";

    /** The key of the configuration. e.g. Data Crawler - {0} */
    String JOB_TEMPLATE_TITLE_DATA = "job.template.title.data";

        final String template = """
                {"source":{"index":"__SOURCE_INDEX__","size":__SIZE__},"dest":{"index":"__DEST_INDEX__"}}
                """;
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String source = template //
                .replace("__SOURCE_INDEX__", fromIndex)//