实际开发中，String拼接成json串作为入参请求接口，发生以下错误

{
    "timestamp": "2018-11-09 14:55:49",
    "status": 400,
    "error": "Bad Request",
    "message": "JSON parse error: Cannot deserialize value of type `java.util.Date` from String \"2016-02-02\": not a valid representation 
    (error: Failed to parse Date value '2016-02-02': Unparseable date: \"2016-02-02\"); 
    nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: 
    Cannot deserialize value of type `java.util.Date` from String \"2016-02-02\": not a valid representation 
    (error: Failed to parse Date value '2016-02-02': Unparseable date: \"2016-02-02\")\n at [Source: (PushbackInputStream); 
    line: 89, column: 23] (through reference chain: com.guorenpcic.grecar.dto.vo.Proposal[\"bc\"]->com.guorenpcic.grecar.dto.vo.BCVo[\"prpTitemCar\"]->
    com.×××.grecar.dto.entity.Prptitemcar[\"certifiCateDate\"])",
    "path": "/ecar/calculationPremium"
}

【问题】这是该字符串certifiCateDate作为Date格式的无法转换成json，转换错误。

【解决办法】实体Prptitemcar字段certifiCateDate上添加 @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8") 注解既解决。