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  • java实现遍历树形菜单方法——service层

    Service接口:

     /**  
    * @Title: IVoteTreeService.java
    * @Package org.Service
    * @Description: TODO该方法的主要作用:
    * @author A18ccms A18ccms_gmail_com  
    * @date 2017-5-6 下午10:42:10
    * @version V1.0  
    */
    package org.Service;
    
    import java.util.List;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    import org.entity.VoteTree;
    
     /**   
     *    
     * 项目名称:testTree   
     * 类名称:IVoteTreeService   
     * 类描述:   
     * 创建人:Mu Xiongxiong  
     * 创建时间:2017-5-6 下午10:42:10   
     * 修改人:Mu Xiongxiong   
     * 修改时间:2017-5-6 下午10:42:10   
     * 修改备注:   
     * @version    
     *    
     */
    public interface IVoteTreeService {
    	
    	public JSONArray getTreeJson();
    	List<VoteTree> treeList();
    }
    

    Service实现类:

     /**  
    * @Title: VoteTreeServiceImpl.java
    * @Package org.Service.impl
    * @Description: TODO该方法的主要作用:
    * @author A18ccms A18ccms_gmail_com  
    * @date 2017-5-6 下午10:43:10
    * @version V1.0  
    */
    package org.Service.impl;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    import org.Service.IVoteTreeService;
    import org.dao.IVoteTreeDao;
    import org.dao.impl.IVoteTreeDaoImpl;
    import org.entity.VoteTree;
    import org.junit.Test;
    
    import com.alibaba.fastjson.JSON;
    import com.sun.org.apache.xerces.internal.parsers.IntegratedParserConfiguration;
    
     /**   
     *    
     * 项目名称:testTree   
     * 类名称:VoteTreeServiceImpl   
     * 类描述:   
     * 创建人:Mu Xiongxiong  
     * 创建时间:2017-5-6 下午10:43:10   
     * 修改人:Mu Xiongxiong   
     * 修改时间:2017-5-6 下午10:43:10   
     * 修改备注:   
     * @version    
     *    
     */
    public class VoteTreeServiceImpl implements IVoteTreeService {
    	IVoteTreeDao voteTreeDao = new IVoteTreeDaoImpl();
    	
    	
    	public JSONArray getTreeJson(){
    		Map<String, Object> treeMap = new HashMap<String, Object>();
    		Map<String, Object> treejsonMap = new HashMap<String, Object>();
    		treeMap.put("id",1);
    		treeMap.put("text", "用户");
    		treeMap.put("children", treeList());
    		JSONArray jsonObject = JSONArray.fromObject(treeMap);
    		return jsonObject;
    		
    	}
    	
    	
    	
    	@Override
    	public List<VoteTree> treeList() {
    		List<VoteTree> nextSubSet = new ArrayList<VoteTree>();
    		//最小的level
    		Long minLevel =voteTreeDao.minId();  
    		//一级目录
    		List<VoteTree> friList = voteTreeDao.getFirstLevel(minLevel);
    		for (VoteTree voteTree : friList) {
    			//根据一级目录查找所有的子集
    			voteTree.setChildren(nextSubSet);
    			nextSubSet =voteTreeDao.getNextSubSet(voteTree);
    		}
    		return nextSubSet;
    	}
    	
    
    }
    


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  • 原文地址:https://www.cnblogs.com/a1111/p/7459714.html
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