Jackson 将日期从 Twitter 反序列化为“ZonedDateTime" [英] Jackson deserialize date from Twitter to `ZonedDateTime`

问题描述

我想将日期从 Twitter 反序列化为 ZonedDateTime.我的程序在 created_at 字段反序列化时失败.

I want to deserialize date from Twitter to ZonedDateTime. My program fails on the created_at field deserializing.

My Domain 类

My Domain class

@JsonIgnoreProperties(ignoreUnknown = true)
public final class Tweet {

    public final String id;
    public final String idStr;
    public final ZonedDateTime created_at;
    public final String text;
    public final long timestamp_ms;
    public final User user;


    @JsonCreator
    public Tweet(@JsonProperty("id") String id,
                 @JsonProperty("id_str") String idStr,
                 @JsonProperty("created_at") ZonedDateTime created_at,
                 @JsonProperty("text") String text,
                 @JsonProperty("timestamp_ms") long timestamp_ms,
                 @JsonProperty("user") User user) {
        this.id = id;
        this.idStr = idStr;
        this.created_at = created_at;
        this.text = text;
        this.timestamp_ms = timestamp_ms;
        this.user = user;
    }
}

我的解析方法

public class TweetTest {
    private static final String TWEET = "{"created_at":"Mon Aug 20 13:28:07 +0000 2018","id":1031533339793129472,"id_str":"1031533339793129472","text":"juntar dinheiro pra ir na prox tour do justin bieber que eu amo","source":"\u003ca href=\"http:\/\/twitter.com\/download\/iphone\" rel=\"nofollow\"\u003eTwitter for iPhone\u003c\/a\u003e","truncated":false,"in_reply_to_status_id":null,"in_reply_to_status_id_str":null,"in_reply_to_user_id":null,"in_reply_to_user_id_str":null,"in_reply_to_screen_name":null,"user":{"id":1239680360,"id_str":"1239680360","name":"ste","screen_name":"flowxrst","location":"Manaus, Brasil","url":null,"description":null,"translator_type":"none","protected":false,"verified":false,"followers_count":1444,"friends_count":378,"listed_count":5,"favourites_count":13566,"statuses_count":40091,"created_at":"Sun Mar 03 19:38:25 +0000 2013","utc_offset":null,"time_zone":null,"geo_enabled":true,"lang":"pt","contributors_enabled":false,"is_translator":false,"profile_background_color":"FFFFFF","profile_background_image_url":"http:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png","profile_background_image_url_https":"https:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png","profile_background_tile":false,"profile_link_color":"000000","profile_sidebar_border_color":"FFFFFF","profile_sidebar_fill_color":"DDEEF6","profile_text_color":"333333","profile_use_background_image":false,"profile_image_url":"http:\/\/pbs.twimg.com\/profile_images\/1030497329999237121\/MLVfvoFy_normal.jpg","profile_image_url_https":"https:\/\/pbs.twimg.com\/profile_images\/1030497329999237121\/MLVfvoFy_normal.jpg","profile_banner_url":"https:\/\/pbs.twimg.com\/profile_banners\/1239680360\/1533144133","default_profile":false,"default_profile_image":false,"following":null,"follow_request_sent":null,"notifications":null},"geo":null,"coordinates":null,"place":null,"contributors":null,"is_quote_status":false,"quote_count":0,"reply_count":0,"retweet_count":0,"favorite_count":0,"entities":{"hashtags":[],"urls":[],"user_mentions":[],"symbols":[]},"favorited":false,"retweeted":false,"filter_level":"low","lang":"pt","timestamp_ms":"1534771687826"}";

    @Test
    public void jackson_parsesDateTime() throws IOException {
        DateFormat dateFormat = new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy", Locale.ENGLISH);
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new JavaTimeModule());
        mapper.setDateFormat(dateFormat);

        Tweet tweet = mapper.readValue(TWEET, Tweet.class);

        Assert.assertNotNull(tweet);
    }

    @Test
    public void ztd_parse() throws ParseException {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss Z yyyy");

        ZonedDateTime.parse("Mon Aug 20 13:28:07 +0000 2018", formatter);
    }
}

两个测试都失败了 om.fasterxml.jackson.databind.exc.InvalidFormatException:无法反序列化类型的值java.time.ZonedDateTimefrom String "Mon Aug 20 13:28:07 +0000 2018":文本 'Mon Aug 20 13:28:07 +0000 2018' 无法在索引 0 处解析 错误.

Both tests fail with the om.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of typejava.time.ZonedDateTimefrom String "Mon Aug 20 13:28:07 +0000 2018": Text 'Mon Aug 20 13:28:07 +0000 2018' could not be parsed at index 0 error.

我在 Stackoverflow 上查过类似的问题，我的 "EEE MMM dd HH:mm:ss Z yyyy" 格式看起来正确.

I've checked the similar questions on Stackoverflow, my "EEE MMM dd HH:mm:ss Z yyyy" format looks correct.

我做错了吗?

已解决

问题出在语言环境中.添加确切的语言环境后，测试开始通过.

The problem was in the locale. After adding the exact locale tests started to pass.

对于jackson_parsesDateTime

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "EEE MMM dd HH:mm:ss Z yyyy", locale = "en")
@JsonProperty("created_at") ZonedDateTime created_at,

用于ztd_parse 测试

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss Z yyyy", Locale.ENGLISH);

推荐答案

尝试在您的属性上添加此注释

Try to add this annotation over your property

@JsonFormat(shape= JsonFormat.Shape.STRING, pattern="EEE MMM dd HH:mm:ss Z yyyy")
@JsonProperty("created_at") 
ZonedDateTime created_at;

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