差異處
這裏顯示兩個版本的差異處。
| 下次修改 | 前次修改 | ||
|
java:jackson:annotation:jsonserialize:convertdate [2016/03/10 23:48] tony 建立 |
java:jackson:annotation:jsonserialize:convertdate [2023/06/25 09:48] (目前版本) |
||
|---|---|---|---|
| 行 72: | 行 72: | ||
| } | } | ||
| </code> | </code> | ||
| + | ==== Convert to Json ==== | ||
| + | 簡單寫一個測試案例，去驗證序列化後再反序列化的內容會一致: | ||
| + | <code java> | ||
| + | @Test | ||
| + | public void testDateWithAnnotation() throws Exception { | ||
| + | ObjectMapper mapper = new ObjectMapper(); | ||
| + | |||
| + | Date d = new Date(); | ||
| + | Event e = new Event(); | ||
| + | e.setDate(d); | ||
| + | |||
| + | String ret = mapper.writeValueAsString(e); | ||
| + | System.out.println(ret); | ||
| + | Event newEvent = mapper.readValue(ret, Event.class); | ||
| + | assertEquals(d.getTime(), newEvent.getDate().getTime()); | ||
| + | } | ||
| + | </code> | ||
| + | output: | ||
| + | <code> | ||
| + | {"date":"2016-03-10T15:40:11.869+0000","message":null} | ||
| + | </code> | ||
| + | ==== Apply to all Date fields ==== | ||
| + | 上面所敘述的是透過在欄位宣告@JsonSerialize，來達到我們的目的。如果想要讓每一個擁有Date的bean物件都能使用這個格式，可以透過Jackson所提供的Module功能，去設定對應物件的Serializer與Deserializer: | ||
| + | <code java> | ||
| + | ObjectMapper mapper = new ObjectMapper(); | ||
| + | |||
| + | SimpleModule m = new SimpleModule(); | ||
| + | m.addSerializer(Date.class, new ISO8601DateSerializer()); | ||
| + | m.addDeserializer(Date.class, new ISO8601DateDeserializer()); | ||
| + | |||
| + | mapper.registerModule(m); | ||
| + | </code> | ||
| + | ==== 後記 ==== | ||
| + | - 時間轉換可以透過[[http://www.joda.org/joda-time/|joda-time]]去實作你想要的格式。 | ||
| + | - Jackson提供了[[https://github.com/FasterXML/jackson-datatype-joda/wiki|joda模組]]，讓你轉換更容易。 | ||
| ===== Reference ===== | ===== Reference ===== | ||
| * [[http://stackoverflow.com/questions/5471379/ways-to-convert-unix-linux-time-to-windows-time|ways-to-convert-unix-linux-time-to-windows-time]] | * [[http://stackoverflow.com/questions/5471379/ways-to-convert-unix-linux-time-to-windows-time|ways-to-convert-unix-linux-time-to-windows-time]] | ||
