杰克逊用时间戳字段反序列化JSON

Question

我有这样的字符串:

{
   "debug":"false", 
   "switchTime":"2017-04-12 17:04:42.896026"
}

我试图通过这种方法获得对象:

new ObjectMapper().readValue(string, MyObject.class);

和MyObject类:

class MyObject {
    private Boolean debug;
    private Timestamp switchTime;
    //...getters, setters, constructors
}

我有这样的例外:

com.fasterxml.jackson.databind.exc.InvalidFormatException: 
Can not deserialize value of type java.sql.Timestamp from String
"2017-04-12 17:04:42.896026": not a valid representation (error:
Failed to parse Date value '2017-04-12 17:04:42.896026': 
Can not parse date "2017-04-12 17:04:42.896026Z": while it seems 
to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSS'Z'', 
parsing fails (leniency? null))  at [Source:   
{"debug":"false", "switchTime":"2017-04-12 17:04:42.896026"}; 

我不明白为什么......如果我在调试模式下使用Timestamp.valueOf()和"2017-04-12 17:04:42.896026" - 我有成功

Answer 1

我认为你需要使用@JsonFormat注释设置预期的日期/时间格式,如下所示.

class MyObject {
  private Boolean debug;
  @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss.SSS")
  private Timestamp switchTime;
  //...getters, setters, constructors
}

您还可以将时区设置为 @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss.SSS",timezone="PST")