List 《Map《String, Object》》进行map里面某个key相同则合并数据

public static void main(String[] args) {  
        //存放所有数据  
        List> dataList = new ArrayList>();  
          
        Map m1 = new HashMap();  
        m1.put("name", "张三");  
        m1.put("afterSaleProfit", 1.3);  
        dataList.add(m1);  
          
        Map m2 = new HashMap();  
        m2.put("name", "李四");  
        m2.put("afterSaleProfit", 2);  
        dataList.add(m2);  
          
        Map m3 = new HashMap();  
        m3.put("name", "李四");  
        m3.put("afterSaleProfit", 1.2);  
        dataList.add(m3);  
          
        Map m4 = new HashMap();  
        m4.put("name", "张三");  
        m4.put("afterSaleProfit", 1);  
        dataList.add(m4);  
          
        List> countList = combineMap("name", dataList);
        
        for (Map map : countList) {  
            System.out.println(map);  
        }  
    }  

/** 
     *  
     * @param combineField 根据该字段进行合并 
     * @param dataList 原始数据 
     * @return 
     */  
    public static List> combineMap(String combineField, List> dataList){  
        //用于存放最后的结果    
        List> countList = new ArrayList>();  
        for (int i = 0; i < dataList.size(); i++) {    
            String oldCombineField = String.valueOf(dataList.get(i).get(combineField));    
                
            int flag = 0;//0为新增数据，1为增加count    
            for (int j = 0; j < countList.size(); j++) {    
                String newCombineField = String.valueOf(countList.get(j).get(combineField));    
                if (oldCombineField.equals(newCombineField)) {  
                    //做累加的操作  
                    double afterSaleProfit = Double.parseDouble(String.valueOf(dataList.get(i).get("afterSaleProfit"))) + Double.parseDouble(String.valueOf(countList.get(j).get("afterSaleProfit")));  
                    countList.get(j).put("afterSaleProfit", afterSaleProfit);    
                    flag = 1; 
                    break;    
                }    
            }    
            if (flag == 0) {    
                countList.add(dataList.get(i));    
            }    
        }    
        return countList;   
    }