org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.util.ArrayList o

使用jackson解析，出现问题

待解析json

{"name":"myEnterprise", "departments":["HR"]}

解析异常

ATTENTION: /enterprise/enterprise: org.codehaus.jackson.map.JsonMappingException: 
Can not deserialize instance of java.util.ArrayList out of VALUE_STRING token at 

解析的代码

public <T> T fromJson(String jsonString, Class<T> clazz) {  
        if (StringUtils.isEmpty(jsonString)) {  
            return null;  
        }  
  
        try {  
            return mapper.readValue(jsonString, clazz);  
        } catch (IOException e) {  
            logger.warn("parse json string error:" + jsonString, e);  
            return null;  
        }  
    }  

TbLtTourOrderGuest[] togs = jsonBinder.fromJson(addGuests, TbLtTourOrderGuest[].class);

排查了下，原来是json字符串的问题

应该是

[{"name":"myEnterprise", "departments":["HR"]}]