java - 如何用 Jackson 序列化 LocalDateTime？

Question

我得到了以下代码:

    ObjectMapper mapper = new ObjectMapper();
    mapper.registerModule(new JavaTimeModule());
    mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
    String now = new ObjectMapper().writeValueAsString(new SomeClass(LocalDateTime.now()));
    System.out.println(now);

我明白了:

{"time":{"hour":20,"minute":49,"second":42,"nano":99000000,"dayOfYear":19,"dayOfWeek":"THURSDAY","month":"JANUARY","dayOfMonth":19,"year":2017,"monthValue":1,"chronology":{"id":"ISO","calendarType":"iso8601"}}}

我要实现的是ISO8601中的字符串

2017-01-19T18:36:51Z

Answer 1

这可能是由于您的代码有误。您正在使用新的未配置的映射器实例，这是修复方法:

 ObjectMapper mapper = new ObjectMapper();
 mapper.registerModule(new JavaTimeModule());
 mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
 String now = mapper.writeValueAsString(new SomeClass(LocalDateTime.now()));
 System.out.println(now);