Map转实体，String 数据转list＜entity＞

如：[{code=xxxx,name=xxxxxxxx}]转换成list

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.readValue(line, objectMapper.getTypeFactory().constructCollectionType(List.class,
                                entity.class));
              

List> results = new ArrayList<>();
       ObjectMapper mapper = new ObjectMapper();
                String s = mapper.writeValueAsString(results);
                xxxxx  xxx= mapper.readValue(s, xxxxx.class);