每日总结6.15

今天做热词数量统计部分

public void sumreci() {
        String keys = null;
        Connection connection = DBUtil.getConn();
        PreparedStatement preparedStatement=null; 
        ResultSet rs=null;
            try {    
                String sql = "select keywords from lunwen";
                preparedStatement=connection.prepareStatement(sql);
                rs=preparedStatement.executeQuery();
                while(rs.next()){
                    if(keys==null) 
                        {keys=(String)rs.getObject(1);}
                    else {keys+=(String)rs.getObject(1);}
                }
            } catch (SQLException  e) {
                e.printStackTrace();
            }
            
            String arrays[]=keys.split(",");
            Map<String,Integer> map = new HashMap<String,Integer>();
            for(int i=0;i<arrays.length;i++){
                if(map.get(arrays[i])!=null){
                    map.put(arrays[i],map.get(arrays[i])+1);
                }else{
                    map.put(arrays[i],1);
                }
            }
            
            
            Set<String> keys1 = map.keySet();
            Iterator<String> its = keys1.iterator();
            int i=1;
            while(its.hasNext()){
                String key = its.next();
                Integer value = map.get(key);
                if(value>1){
                    //System.out.println(i+"元素"+key+" "+value);
                    i++;
                }
            }
 
            
    }