杰克逊自动格式化Joda DateTime为ISO 8601格式 [英] Jackson automatic formatting of Joda DateTime to ISO 8601 format

问题描述

根据 http://wiki.fasterxml.com/JacksonFAQDateHandling ，DateTime可以自动序列化/反序列化，类似于java.util.Date的处理方式。但是，我无法完成此自动功能。有关于此主题的StackOverflow讨论，但大多数涉及基于代码的解决方案，但基于上面的引用，我应该能够通过简单的配置来实现这一点。

According to http://wiki.fasterxml.com/JacksonFAQDateHandling, "DateTime can be automatically serialized/deserialized similar to how java.util.Date is handled." However, I am not able to accomplish this automatic functionality. There are StackOverflow discussions related to this topic yet most involve a code-based solution, but based upon the quote above I should be able to accomplish this via simple configuration.

Per http://wiki.fasterxml.com/JacksonFAQDateHandling 我的配置已设置为将日期写为时间戳为假。结果是java.util.Date类型被序列化为ISO 8601格式，但org.joda.time.DateTime类型被序列化为长对象表示。

Per http://wiki.fasterxml.com/JacksonFAQDateHandling I have my configuration set so that writing dates as timestamps is false. The result is that java.util.Date types are serialized to ISO 8601 format, but org.joda.time.DateTime types are serialized to a long object representation.

My环境是这样的：

Jackson 2.1

Joda time 2.1

Spring 3.2

Java 1.6

Jackson 2.1
Joda time 2.1
Spring 3.2
Java 1.6

我的jsonMapper bean的Spring配置是

My Spring configuration for the jsonMapper bean is

@Bean
public ObjectMapper jsonMapper() {
    ObjectMapper objectMapper = new ObjectMapper();

    //Fully qualified path shows I am using latest enum
    ObjectMapper.configure(com.fasterxml.jackson.databind.SerializationFeature.
        WRITE_DATES_AS_TIMESTAMPS , false);

    return objectMapper;
}

我的测试代码片段是这个

My test code snippet is this

Date d = new Date();
DateTime dt = new DateTime(d); //Joda time 
Map<String, Object> link = new LinkedHashMap<String, Object>();
link.put("date", d);
link.put("createdDateTime", dt);

生成的JSON输出片段为：

The resulting snippet of JSON output is this:

{"date":"2012-12-24T21:20:47.668+0000"}

{"createdDateTime": {"year":2012,"dayOfMonth":24,"dayOfWeek":1,"era":1,"dayOfYear":359,"centuryOfEra":20,"yearOfEra":2012,"yearOfCentury":12,"weekyear":2012,"monthOfYear":12 *... remainder snipped for brevity*}}

我的期望是DateTime对象应该根据配置匹配Date对象的那个。我做错了什么，或者我误解了什么？我是否对Jackson文档中的自动这个词进行了过多的阅读，并且生成字符串表示虽然不是ISO 8601，却产生了广告自动功能？

My expectation is that the DateTime object should matche that of the Date object based upon the configuration. What am I doing wrong, or what am I misunderstanding? Am I reading too much into the word automatically from the Jackson documentation and the fact that a string representation was produced, albeit not ISO 8601, is producing the advertised automatic functionality?

推荐答案

我能够从杰克逊用户邮件列表中得到答案，并希望与您分享，因为这是一个新手问题。从阅读杰克逊日期常见问题解答，我没有意识到需要额外的依赖和注册，但事实就是这样。它在git hub项目页面上有记录， https://github.com/FasterXML/jackson-datatype-joda

I was able to get the answer to this from the Jackson user mailing list, and wanted to share with you since it is a newbie issue. From reading the Jackson Date FAQ, I did not realize that extra dependencies and registration are required, but that is the case. It is documented at the git hub project page here https://github.com/FasterXML/jackson-datatype-joda

基本上，我必须为特定于Joda数据类型的Jackson jar添加另一个依赖项，然后我必须在对象映射器上注册该模块的使用。代码片段如下。

Essentially, I had to add another dependency to a Jackson jar specific to the Joda data type, and then I had to register the use of that module on the object mapper. The code snippets are below.

对于我的Jackson Joda数据类型Maven依赖设置，我使用了这个：

For my Jackson Joda data type Maven dependency setup I used this:

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-joda</artifactId>
    <version>${jackson.version}</version>
</dependency>

要注册Joda序列化/反序列化功能，我使用了这个：

To register the Joda serialization/deserialization feature I used this:

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new JodaModule());
objectMapper.configure(com.fasterxml.jackson.databind.SerializationFeature.
    WRITE_DATES_AS_TIMESTAMPS , false);

这篇关于杰克逊自动格式化Joda DateTime为ISO 8601格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！