每日学习

今天继续个人作业2，

对于获取的数据的处理：

public Map<String,Integer> getallmax()
    {
        String sql="select * from cvpr";
        Map<String, Integer>map=new HashMap<String, Integer>();
        Map<String, Integer>sorted=new HashMap<String, Integer>();
        Connection con=null;
        Statement state=null;
        ResultSet rs=null;
        try {
			con=Util.getConnection();
		} catch (SQLException e3) {
			// TODO Auto-generated catch block
			e3.printStackTrace();
		}
        try {
            state=con.createStatement();
            rs=state.executeQuery(sql);
            while(rs.next())
            {
                String keywords=rs.getString("keywords");
                String[] split = keywords.split(",");
                for(int i=0;i<split.length;i++)
                {
                    if(map.get(split[i])==null)
                    {
                        map.put(split[i],0);
                    }
                    else
                    {
                        map.replace(split[i], map.get(split[i])+1);
                    }
                }
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Util.close( con, state,rs);
        sorted = map
                .entrySet()
                .stream()
                .sorted(Collections.reverseOrder(Map.Entry.comparingByValue()))
                .collect(
                		Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e2,
                                LinkedHashMap::new));
        return sorted;
    }