blocks|key|1198242|text|在要映射的对象中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1198243|@JsonSerialize(using+=+CustomDateSerializer.class)
public+DateTime+getDate()+{+...+}|code-block|syntax|javascript|1198244|在CustomDateSerializer中：|1198245|public+class+CustomDateSerializer+extends+JsonSerializer<DateTime>+{

++++private+static+DateTimeFormatter+formatter+=+
++++++++DateTimeFormat.forPattern("dd-MM-yyyy");

++++@Override
++++public+void+serialize(DateTime+value,+JsonGenerator+gen,+
++++++++++++++++++++++++++SerializerProvider+arg2)
++++++++throws+IOException,+JsonProcessingException+{

++++++++gen.writeString(formatter.print(value));
++++}
}|1198246|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In the object you're mapping:

<pre><code>@JsonSerialize(using = CustomDateSerializer.class)
public DateTime getDate() { ... }
</code></pre>

In CustomDateSerializer:

<pre><code>public class CustomDateSerializer extends JsonSerializer&lt;DateTime&gt; {

 private static DateTimeFormatter formatter = 
 DateTimeFormat.forPattern("dd-MM-yyyy");

 @Override
 public void serialize(DateTime value, JsonGenerator gen, 
 SerializerProvider arg2)
 throws IOException, JsonProcessingException {

 gen.writeString(formatter.print(value));
 }
}
</code></pre>

blocks|key|1198300|text|https://stackoverflow.com/a/10835114/1113510|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1198301|尽管您可以为每个日期字段添加注释，但最好对对象映射器进行全局配置。如果你使用jackson，你可以这样配置你的弹簧：|1198302|<bean+id="jacksonObjectMapper"+class="com.company.CustomObjectMapper"+/>

<bean+id="jacksonSerializationConfig"+class="org.codehaus.jackson.map.SerializationConfig"
++++factory-bean="jacksonObjectMapper"+factory-method="getSerializationConfig"+>
</bean>|code-block|syntax|javascript|1198303|对于CustomObjectMapper：|1198304|public+class+CustomObjectMapper+extends+ObjectMapper+{

++++public+CustomObjectMapper()+{
++++++++super();
++++++++configure(Feature.WRITE_DATES_AS_TIMESTAMPS,+false);
++++++++setDateFormat(new+SimpleDateFormat("EEE+MMM+dd+yyyy+HH:mm:ss+'GMT'ZZZ+(z)"));
++++}
}|1198305|当然，SimpleDateFormat可以使用您需要的任何格式。|1198306|entityMap|0|LINK|mutability|MUTABLE|url^0|0|18|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|14|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|15|8|@]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|4]]]]

<a href="https://stackoverflow.com/a/10835114/1113510">https://stackoverflow.com/a/10835114/1113510</a>

Although you can put an annotation for each date field, is better to do a global configuration for your object mapper. If you use jackson you can configure your spring as follow:

<pre><code>&lt;bean id="jacksonObjectMapper" class="com.company.CustomObjectMapper" /&gt;

&lt;bean id="jacksonSerializationConfig" class="org.codehaus.jackson.map.SerializationConfig"
 factory-bean="jacksonObjectMapper" factory-method="getSerializationConfig" &gt;
&lt;/bean&gt;
</code></pre>

For CustomObjectMapper:

<pre><code>public class CustomObjectMapper extends ObjectMapper {

 public CustomObjectMapper() {
 super();
 configure(Feature.WRITE_DATES_AS_TIMESTAMPS, false);
 setDateFormat(new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss 'GMT'ZZZ (z)"));
 }
}
</code></pre>

Of course, SimpleDateFormat can use any format you need.

blocks|key|1198350|text|有了Jackson+2.0和Joda模块，这就变得非常容易了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1198351|ObjectMapper+mapper+=+new+ObjectMapper();
mapper.registerModule(new+JodaModule());|code-block|syntax|javascript|1198352|Maven依赖：|1198353|<dependency>
++<groupId>com.fasterxml.jackson.datatype</groupId>
++<artifactId>jackson-datatype-joda</artifactId>
++<version>2.1.1</version>
</dependency>++|1198354|代码和文档：https://github.com/FasterXML/jackson-datatype-joda|offset|length|1198355|二进制文件：http://repo1.maven.org/maven2/com/fasterxml/jackson/datatype/jackson-datatype-joda/|1198356|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/FasterXML/jackson-datatype-joda|1|http://repo1.maven.org/maven2/com/fasterxml/jackson/datatype/jackson-datatype-joda/^0|0|0|0|0|6|1E|0|0|6|2B|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@$M|15|N|16|1|17]]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@$M|19|N|1A|1|1B]]|A|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

This has become very easy with Jackson 2.0 and the Joda module. 

<pre class="lang-java prettyprint-override"><code>ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JodaModule());
</code></pre>

Maven dependency:

<pre class="lang-xml prettyprint-override"><code>&lt;dependency&gt;
 &lt;groupId&gt;com.fasterxml.jackson.datatype&lt;/groupId&gt;
 &lt;artifactId&gt;jackson-datatype-joda&lt;/artifactId&gt;
 &lt;version&gt;2.1.1&lt;/version&gt;
&lt;/dependency&gt; 
</code></pre>

Code and documentation:
<a href="https://github.com/FasterXML/jackson-datatype-joda">https://github.com/FasterXML/jackson-datatype-joda</a>

Binaries:
<a href="http://repo1.maven.org/maven2/com/fasterxml/jackson/datatype/jackson-datatype-joda/">http://repo1.maven.org/maven2/com/fasterxml/jackson/datatype/jackson-datatype-joda/</a>

blocks|key|983883|text|正如@Kimble所说，在Jackson+2中，使用默认格式非常简单；只需在ObjectMapper上注册JodaModule即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|983884|ObjectMapper+mapper+=+new+ObjectMapper();
mapper.registerModule(new+JodaModule());|code-block|syntax|javascript|983885|对于自定义的DateTime序列化/反序列化，您需要实现您自己的StdScalarSerializer和StdScalarDeserializer；这非常复杂，但不管怎样。|983886|例如，下面是一个使用具有协调世界时时区的ISODateFormat的DateTime序列化器：|983887|public+class+DateTimeSerializer+extends+StdScalarSerializer<DateTime>+{

++++public+DateTimeSerializer()+{
++++++++super(DateTime.class);
++++}

++++@Override
++++public+void+serialize(DateTime+dateTime,
++++++++++++++++++++++++++JsonGenerator+jsonGenerator,
++++++++++++++++++++++++++SerializerProvider+provider)+throws+IOException,+JsonGenerationException+{
++++++++String+dateTimeAsString+=+ISODateTimeFormat.withZoneUTC().print(dateTime);
++++++++jsonGenerator.writeString(dateTimeAsString);
++++}
}|983888|和相应的反序列化程序：|983889|public+class+DateTimeDesrializer+extends+StdScalarDeserializer<DateTime>+{

++++public+DateTimeDesrializer()+{
++++++++super(DateTime.class);
++++}

++++@Override
++++public+DateTime+deserialize(JsonParser+jsonParser,
++++++++++++++++++++++++++++++++DeserializationContext+deserializationContext)+throws+IOException,+JsonProcessingException+{
++++++++try+{
++++++++++++JsonToken+currentToken+=+jsonParser.getCurrentToken();
++++++++++++if+(currentToken+==+JsonToken.VALUE_STRING)+{
++++++++++++++++String+dateTimeAsString+=+jsonParser.getText().trim();
++++++++++++++++return+ISODateTimeFormat.withZoneUTC().parseDateTime(dateTimeAsString);
++++++++++++}
++++++++}+finally+{
++++++++++++throw+deserializationContext.mappingException(getValueClass());
++++++++}
++++}|983890|然后使用一个模块将这些绑定在一起：|983891|public+class+DateTimeModule+extends+SimpleModule+{

++++public+DateTimeModule()+{
++++++++super();
++++++++addSerializer(DateTime.class,+new+DateTimeSerializer());
++++++++addDeserializer(DateTime.class,+new+DateTimeDeserializer());
++++}
}|983892|然后在您的ObjectMapper上注册该模块|983893|ObjectMapper+mapper+=+new+ObjectMapper();
mapper.registerModule(new+DateTimeModule());|983894|entityMap^0|12|C|1H|A|0|0|6|8|W|J|1G|L|0|K|D|Y|8|0|0|0|0|0|0|5|C|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|1H|8|@$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|O|3|P|5|H|7|1M|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|1N|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|1O|8|@]|D|@]|E|$I|J]]|$1|U|3|V|5|6|7|1P|8|@]|D|@]|E|$]]|$1|W|3|X|5|H|7|1Q|8|@]|D|@]|E|$I|J]]|$1|Y|3|Z|5|6|7|1R|8|@$9|1S|A|1T|B|C]]|D|@]|E|$]]|$1|10|3|11|5|H|7|1U|8|@]|D|@]|E|$I|J]]|$1|12|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]]|13|$]]

As @Kimble has said, with Jackson 2, using the default formatting is very easy; simply register <code>JodaModule</code> on your <code>ObjectMapper</code>.

<pre><code>ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JodaModule());
</code></pre>

For custom serialization/de-serialization of <code>DateTime</code>, you need to implement your own <code>StdScalarSerializer</code> and <code>StdScalarDeserializer</code>; it's pretty convoluted, but anyway. 

For example, here's a <code>DateTime</code> serializer that uses the <code>ISODateFormat</code> with the UTC time zone:

<pre><code>public class DateTimeSerializer extends StdScalarSerializer&lt;DateTime&gt; {

 public DateTimeSerializer() {
 super(DateTime.class);
 }

 @Override
 public void serialize(DateTime dateTime,
 JsonGenerator jsonGenerator,
 SerializerProvider provider) throws IOException, JsonGenerationException {
 String dateTimeAsString = ISODateTimeFormat.withZoneUTC().print(dateTime);
 jsonGenerator.writeString(dateTimeAsString);
 }
}
</code></pre>

And the corresponding de-serializer:

<pre><code>public class DateTimeDesrializer extends StdScalarDeserializer&lt;DateTime&gt; {

 public DateTimeDesrializer() {
 super(DateTime.class);
 }

 @Override
 public DateTime deserialize(JsonParser jsonParser,
 DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
 try {
 JsonToken currentToken = jsonParser.getCurrentToken();
 if (currentToken == JsonToken.VALUE_STRING) {
 String dateTimeAsString = jsonParser.getText().trim();
 return ISODateTimeFormat.withZoneUTC().parseDateTime(dateTimeAsString);
 }
 } finally {
 throw deserializationContext.mappingException(getValueClass());
 }
 }
</code></pre>

Then tie these together with a module:

<pre><code>public class DateTimeModule extends SimpleModule {

 public DateTimeModule() {
 super();
 addSerializer(DateTime.class, new DateTimeSerializer());
 addDeserializer(DateTime.class, new DateTimeDeserializer());
 }
}
</code></pre>

Then register the module on your <code>ObjectMapper</code>:

<pre><code>ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new DateTimeModule());
</code></pre>

blocks|key|1198477|text|对于那些使用Spring+Boot的用户，您必须将该模块添加到您的上下文中，它将像这样添加到您的配置中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1198478|@Bean
public+Module+jodaTimeModule()+{
++++return+new+JodaModule();
}|code-block|syntax|javascript|1198479|如果你想使用新的java8时间模块jsr-310。|1198480|@Bean
public+Module+jodaTimeModule()+{
++++return+new+JavaTimeModule();
}|1198481|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For those with Spring Boot you have to add the module to your context and it will be added to your configuration like this.

<pre><code>@Bean
public Module jodaTimeModule() {
 return new JodaModule();
}
</code></pre>

And if you want to use the new java8 time module jsr-310.

<pre><code>@Bean
public Module jodaTimeModule() {
 return new JavaTimeModule();
}
</code></pre>

blocks|key|984020|text|我使用的是Java+8，这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|984021|添加对pom.xml的依赖|offset|length|style|CODE|984022|<dependency>
++++<groupId>com.fasterxml.jackson.datatype</groupId>
++++<artifactId>jackson-datatype-jsr310</artifactId>
++++<version>2.4.0</version>
</dependency>|code-block|syntax|javascript|984023|并在您的ObjectMapper上添加JodaModule|984024|ObjectMapper+mapper+=+new+ObjectMapper();
mapper.registerModule(new+JodaModule());|984025|entityMap^0|0|3|7|0|0|4|C|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

I'm using Java 8 and this worked for me.

Add the dependency on <code>pom.xml</code>

<pre><code>&lt;dependency&gt;
 &lt;groupId&gt;com.fasterxml.jackson.datatype&lt;/groupId&gt;
 &lt;artifactId&gt;jackson-datatype-jsr310&lt;/artifactId&gt;
 &lt;version&gt;2.4.0&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

and add JodaModule on your <code>ObjectMapper</code>

<pre><code>ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JodaModule());
</code></pre>

blocks|key|984078|text|同时，当JodaModule在类路径中时，Jackson会自动注册Joda模块。我只需将jackson-datatype-joda添加到Maven中，它立即就能工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|984079|<dependency>
++<groupId>com.fasterxml.jackson.datatype</groupId>
++<artifactId>jackson-datatype-joda</artifactId>
++<version>2.8.7</version>
</dependency>|code-block|syntax|javascript|984080|JSON输出：|984081|{"created"+:+"2017-03-28T05:59:27.258Z"}|984082|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Meanwhile Jackson registers the Joda module automatically when the JodaModule is in classpath. I just added jackson-datatype-joda to Maven and it worked instantly.

<pre><code>&lt;dependency&gt;
 &lt;groupId&gt;com.fasterxml.jackson.datatype&lt;/groupId&gt;
 &lt;artifactId&gt;jackson-datatype-joda&lt;/artifactId&gt;
 &lt;version&gt;2.8.7&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

JSON output:

<pre><code>{"created" : "2017-03-28T05:59:27.258Z"}
</code></pre>

How do I get Jackson to serialize my Joda DateTime object according to a simple pattern (like "dd-MM-yyyy")?

I've tried:

<pre><code>@JsonSerialize(using=DateTimeSerializer.class)
private final DateTime date;
</code></pre>

I've also tried:

<pre><code>ObjectMapper mapper = new ObjectMapper()
 .getSerializationConfig()
 .setDateFormat(df);
</code></pre>

Thanks!

How to serialize Joda DateTime with Jackson JSON processor?

Spring Boot

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Java

如何让Jackson根据简单的模式(如"dd-MM-yyyy")序列化我的Joda DateTime对象？我试过了：@JsonSerialize(using=DateTimeSerializer.class)private final DateTime date;我也尝试过：ObjectMapper mapper = ...

问如何使用Jackson JSON处理器序列化Joda DateTime？
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