package edu.nju.service; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import edu.nju.dao.AnnotationDao; import edu.nju.entities.ImageAnnotation; @Service public class AnnotationService { @Autowired AnnotationDao andao; public boolean save(String id, String width, String height, String[] xs, String[] ys) { try { andao.save(new ImageAnnotation(id, width, height, xs, ys)); return true; } catch (Exception e) { return false; } } public boolean delete(String id) { try { andao.remove(id); return true; } catch (Exception e) { return false; } } public ImageAnnotation get(String id) { return andao.findById(id); } }