使用杰克逊的json中的ISO8601毫秒 [英] ISO8601 with milliseconds in json using Jackson

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本文介绍了使用杰克逊的json中的ISO8601毫秒的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

import com.fasterxml.jackson.databind.util.ISO8601DateFormat;

objectMapper.setDateFormat(new ISO8601DateFormat());

很好但这忽略了毫秒,如何在不使用非线程的情况下在日期中获取它们安全 SimpleDateFormatter

Nice but this ignores milliseconds, how can I get them in the dates without using the non-thread-safe SimpleDateFormatter?

https://github.com/FasterXML/jackson-databind/blob/master/src/ main / java / com / fasterxml / jackson / databind / util / ISO8601DateFormat.java

推荐答案

ISO8601DateFormat.format 调用 ISO8601Utils.format(日期),后者又调用 format(date,false, TIMEZONE_Z) - false 参数告诉jackson不包括毫秒。

ISO8601DateFormat.format calls ISO8601Utils.format(date), which in turn calls format(date, false, TIMEZONE_Z) - the false parameter tells jackson to don't include the milliseconds.

似乎没有办法配置这个类设置任何参数,但幸运的是它可以扩展:

There seems to be no way to configure this class nor set any parameter, but fortunately it can be extended:

public class ISO8601WithMillisFormat extends ISO8601DateFormat {
    @Override
    public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
        String value = ISO8601Utils.format(date, true); // "true" to include milliseconds
        toAppendTo.append(value);
        return toAppendTo;
    }
}

然后我们可以在对象映射器中使用这个新类:

Then we can use this new class in the object mapper:

ObjectMapper objectMapper = new ObjectMapper();
ISO8601DateFormat dateFormat = new ISO8601WithMillisFormat();
objectMapper.setDateFormat(dateFormat);

我用新日期(),结果是 2017-07-24T12:14:26.817Z (以毫秒为单位)。

I've made a test with new Date() and the result was 2017-07-24T12:14:26.817Z (with the milliseconds).

这篇关于使用杰克逊的json中的ISO8601毫秒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!

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