map合并

得到一些数据，List<Map<String，String>>  里面存的代码值和代码类型，

 

list=Arrays.asList(Immutable.of("code","001","type","‘充值’),Immutable.of("code","002","type","‘充值2’),Immutable.of("code","003","type","‘充值3’));

现在需要将list转为map，数据格式为，Immutable.of("001","充值","002","充值2'，“003”，"充值3");

Map map=new Hash();

list.forEach(li->map.merge(li.get(“code”)，li.get("type"),

(k,v)->{

throw new RuntimeException("充值类型代码值重复");

}

));

　

不适用本次需求，
Map<String, String> _czType = czType.stream().flatMap(map -> map.entrySet().stream())
        .collect(Collectors.toMap(
                Map.Entry::getKey,
                Map.Entry::getValue
        ));