lamada表达式优化多层for循环速度

相对于直接双层for循环，速度起飞

Map<String,Map<String,String>> map2= resultList.stream().collect(
                Collectors.toMap(s->getKeyStr(s),s->s));

dataList.forEach(c->{
     if(map2.get(getKey(c))!=null){
         c.put("debitStartSum",map2.get(getKey(c)).get("debitStartSum"));  
});
        
public String getKeyStr(Map<String,String>s){
   return String.valueOf(s.get("sys_object_id"))+","+String.valueOf(s.get("account"))+","
           +String.valueOf(s.get("currency_type"))+","+String.valueOf(s.get("sb_id"));
}

标签：String,get,valueOf,多层,map2,lamada,debitStartSum,id,表达式
来源： https://blog.csdn.net/ashe1318758303/article/details/104758653