项目初始导入

src/main/java/com/nis/web/service/TreeService.java

@@ -0,0 +1,81 @@
+
+package com.nis.web.service;
+
+import java.util.List;
+
+import org.springframework.transaction.annotation.Transactional;
+
+import com.nis.domain.TreeEntity;
+import com.nis.exceptions.ServiceException;
+import com.nis.util.Reflections;
+import com.nis.util.StringUtil;
+import com.nis.util.StringUtils;
+import com.nis.web.dao.TreeDao;
+
+/**
+ * Service基类
+ * @author ThinkGem
+ * @version 2014-05-16
+ */
+public abstract class TreeService<D extends TreeDao<T>, T extends TreeEntity<T>> extends CrudService<D, T> {
+	
+	public void save(T entity) {
+		
+		@SuppressWarnings("unchecked")
+		Class<T> entityClass = Reflections.getClassGenricType(getClass(), 1);
+		
+		// 如果没有设置父节点，则代表为跟节点，有则获取父节点实体
+		if (entity.getParent() == null || StringUtil.isEmpty(entity.getParentId()) 
+				|| "0".equals(entity.getParentId())){
+			entity.setParent(null);
+		}else{
+			entity.setParent(super.get(entity.getParentId()));
+		}
+		if (entity.getParent() == null){
+			T parentEntity = null;
+			try {
+				parentEntity = entityClass.getConstructor(Long.class).newInstance(0l);
+			} catch (Exception e) {
+				throw new ServiceException(e);
+			}
+			entity.setParent(parentEntity);
+			entity.getParent().setParentIds(StringUtils.EMPTY);
+		}
+		
+		// 获取修改前的parentIds，用于更新子节点的parentIds
+		String oldParentIds = entity.getParentIds(); 
+		
+		// 设置新的父节点串
+		entity.setParentIds(entity.getParent().getParentIds()+entity.getParent().getId()+",");
+		
+		// 保存或更新实体
+		super.save(entity);
+		
+		// 更新子节点 parentIds
+		T o = null;
+		try {
+			o = entityClass.newInstance();
+		} catch (Exception e) {
+			throw new ServiceException(e);
+		}
+		o.setParentIds("%,"+entity.getId()+",%");
+		List<T> list = dao.findByParentIdsLike(o);
+		for (T e : list){
+			if (e.getParentIds() != null && oldParentIds != null){
+				e.setParentIds(e.getParentIds().replace(oldParentIds, entity.getParentIds()));
+				preUpdateChild(entity, e);
+				dao.updateParentIds(e);
+			}
+		}
+		
+	}
+	
+	/**
+	 * 预留接口，用户更新子节前调用
+	 * @param childEntity
+	 */
+	protected void preUpdateChild(T entity, T childEntity) {
+		
+	}
+
+}