将DateTimeFormatter与ObjectMapper一起使用 [英] Using DateTimeFormatter with ObjectMapper

问题描述

在Java8之前，我们曾经使用ObjectMapper设置DateFormat，如下所示:

Prior to Java8, we used to set DateFormat with ObjectMapper as follows

DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
ObjectMapper mapper = <SomeInstantiation>
mapper.setDateFormat(df);
mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

现在，我们有了java.time.format.DateTimeFormatter，它与SimpleDateFormat相比具有线程安全性和更强大的功能.我想替换ObjectMapper上的上述设置.

Now that we have java.time.format.DateTimeFormatter which is threadsafe and more robust unlike SimpleDateFormat. I want to replace above settings on ObjectMapper.

如何使用ObjectMapper设置DateTimeFormatter

How do I set DateTimeFormatter with ObjectMapper

推荐答案

您可以尝试以下操作:

DateTimeFormatter formatter = DateTimeFormatter.ISO_DATE_TIME;

LocalDateTimeDeserializer dateTimeDeserializer = new LocalDateTimeDeserializer(formatter);
LocalDateTimeSerializer dateTimeSerializer = new LocalDateTimeSerializer(formatter);

JavaTimeModule javaTimeModule = new JavaTimeModule(); 
javaTimeModule.addDeserializer(LocalDateTime.class, dateTimeDeserializer);
javaTimeModule.addSerializer(LocalDateTime.class, dateTimeSerializer);

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(javaTimeModule);

需要 jackson-datatype-jsr310 依赖项:

The jackson-datatype-jsr310 dependency is required:

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.8.2</version>
</dependency>

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