Could not read document: Can not deserialize instance of java.lang.String out of START_ARRAY

线上问题：

{
    "timestamp": "1544510665",
    "status": 400,
    "error": "Bad Request",
    "exception": "org.springframework.http.converter.HttpMessageNotReadableException",
    "message": "Could not read document: Can not deserialize instance of java.lang.String out of START_ARRAY token\n at [Source: java.io.PushbackInputStream@6d9b2ba7; line: 18, column: 18] (through reference chain: com.imdada.shine.dao.vo.SenderVo[\"poiAddress\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token\n at [Source: java.io.PushbackInputStream@6d9b2ba7; line: 18, column: 18] (through reference chain: com.imdada.shine.dao.vo.SenderVo[\"poiAddress\"])",
    "path": "/toc/corp/client/addSender"
}

解决方案：
    发现是在解析json字符串的时候，某个字段的值本来应该是字符串，结果是[开头的