blocks|key|4510995|text|我添加了com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.6.1依赖项，并开始获取以下格式的日期：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4510996|"birthDate":+[
++++2016,
++++1,
++++25,
++++21,
++++34,
++++55
++]|code-block|syntax|javascript|4510997|这不是我想要的但我越来越接近了。然后我添加了以下内容|4510998|spring.jackson.serialization.write_dates_as_timestamps=false|4510999|转换成application.properties文件，它给了我所需的正确格式。|4511000|"birthDate":+"2016-01-25T21:34:55"|4511001|entityMap^0|4|1O|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|T|$]]

I added the <code>com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.6.1</code> dependency and started to get the date in the following format:
<pre><code>&quot;birthDate&quot;: [
 2016,
 1,
 25,
 21,
 34,
 55
 ]
</code></pre>
which is not what I wanted but I was getting closer. I then added the following
<pre><code>spring.jackson.serialization.write_dates_as_timestamps=false
</code></pre>
to application.properties file which gave me the correct format that I needed.
<pre><code>&quot;birthDate&quot;: &quot;2016-01-25T21:34:55&quot;
</code></pre>

blocks|key|4511035|text|这是在maven中使用的属性，这样您就可以在spring+boot升级之间存活下来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511036|<dependency>
++++++++<groupId>com.fasterxml.jackson.datatype</groupId>
++++++++<artifactId>jackson-datatype-jsr310</artifactId>
++++++++<version>${jackson.version}</version>
</dependency>|code-block|syntax|javascript|4511037|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here it is in maven, with the property so you can survive between spring boot upgrades

<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-jsr310&lt;/artifactId&gt;
 &lt;version&gt;${jackson.version}&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

blocks|key|3541|text|1)依赖性|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3542|+compile+group:+'com.fasterxml.jackson.datatype',+name:+'jackson-datatype-jsr310',+version:+'2.8.8'+|code-block|syntax|javascript|3543|2)日期-时间格式的注解。|3544|public+class+RestObject+{

++++private+LocalDateTime+timestamp;

++++@JsonFormat(pattern+=+"yyyy-MM-dd+HH:mm:ss")
++++public+LocalDateTime+getTimestamp()+{
++++++++return+timestamp;
++++}
}|3545|3)+Spring+Config。|3546|@Configuration
public+class+JacksonConfig+{

++++@Bean
++++@Primary
++++public+ObjectMapper+objectMapper(Jackson2ObjectMapperBuilder+builder)+{
++++++++System.out.println("Config+is+starting.");
++++++++ObjectMapper+objectMapper+=+builder.createXmlMapper(false).build();
++++++++objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS,+false);
++++++++return+objectMapper;
++++}
}|3547|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

1) Dependency

<pre><code> compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: '2.8.8' 
</code></pre>

2) Annotation with date-time format.

<pre><code>public class RestObject {

 private LocalDateTime timestamp;

 @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
 public LocalDateTime getTimestamp() {
 return timestamp;
 }
}
</code></pre>

3) Spring Config.

<pre><code>@Configuration
public class JacksonConfig {

 @Bean
 @Primary
 public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
 System.out.println("Config is starting.");
 ObjectMapper objectMapper = builder.createXmlMapper(false).build();
 objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
 return objectMapper;
 }
}
</code></pre>

blocks|key|4511093|text|我发现了另一个解决方案，您可以将其转换为您想要的任何格式，并应用于所有LocalDateTime数据类型，并且您不必在每个LocalDateTime数据类型上指定@JsonFormat。首先添加依赖项：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511094|<dependency>
++++<groupId>com.fasterxml.jackson.datatype</groupId>
++++<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>|code-block|syntax|javascript|4511095|添加以下bean：|4511096|@Configuration
public+class+Java8DateTimeConfiguration+{
++++/**
+++++*+Customizing
+++++*+http://docs.spring.io/spring-boot/docs/current/reference/html/howto-spring-mvc.html
+++++*
+++++*+Defining+a+@Bean+of+type+Jackson2ObjectMapperBuilder+will+allow+you+to+customize+both+default+ObjectMapper+and+XmlMapper+(used+in+MappingJackson2HttpMessageConverter+and+MappingJackson2XmlHttpMessageConverter+respectively).
+++++*/
++++@Bean
++++public+Module+jsonMapperJava8DateTimeModule()+{
++++++++val+bean+=+new+SimpleModule();

++++++++bean.addDeserializer+(ZonedDateTime.class,+new+JsonDeserializer<ZonedDateTime>()+{
++++++++++++@Override
++++++++++++public+ZonedDateTime+deserialize(JsonParser+jsonParser,+DeserializationContext+deserializationContext)+throws+IOException,+JsonProcessingException+{
++++++++++++++++return+ZonedDateTime.parse(jsonParser.getValueAsString(),+DateTimeFormatter.ISO_ZONED_DATE_TIME);
++++++++++++}
++++++++});

++++++++bean.addDeserializer(LocalDateTime.class,+new+JsonDeserializer<LocalDateTime>()+{
++++++++++++@Override
++++++++++++public+LocalDateTime+deserialize(JsonParser+jsonParser,+DeserializationContext+deserializationContext)+throws+IOException,+JsonProcessingException+{
++++++++++++++++return+LocalDateTime.parse(jsonParser.getValueAsString(),+DateTimeFormatter.ISO_LOCAL_DATE_TIME);
++++++++++++}
++++++++});

++++++++bean.addSerializer(ZonedDateTime.class,+new+JsonSerializer<ZonedDateTime>()+{
++++++++++++@Override
++++++++++++public+void+serialize(
++++++++++++++++++++ZonedDateTime+zonedDateTime,+JsonGenerator+jsonGenerator,+SerializerProvider+serializerProvider)
++++++++++++++++++++throws+IOException+{
++++++++++++++++jsonGenerator.writeString(DateTimeFormatter.ISO_ZONED_DATE_TIME.format(zonedDateTime));
++++++++++++}
++++++++});

++++++++bean.addSerializer(LocalDateTime.class,+new+JsonSerializer<LocalDateTime>()+{
++++++++++++@Override
++++++++++++public+void+serialize(
++++++++++++++++++++LocalDateTime+localDateTime,+JsonGenerator+jsonGenerator,+SerializerProvider+serializerProvider)
++++++++++++++++++++throws+IOException+{
++++++++++++++++jsonGenerator.writeString(DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(localDateTime));
++++++++++++}
++++++++});

++++++++return+bean;
++++}
}|4511097|在您的配置文件中添加以下内容：|4511098|@Import(Java8DateTimeConfiguration.class)|4511099|这将序列化和反序列化所有属性LocalDateTime和ZonedDateTime，只要您使用的是spring创建的objectMapper。|4511100|对于LocalDateTime，您得到的ZonedDateTime格式为：“2017-12-27T08:55:17.317%2B02:00亚洲/耶路撒冷”："2017-12-27T09:05:30.523“|4511101|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I found another solution which you can convert it to whatever format you want and apply to all LocalDateTime datatype and you do not have to specify @JsonFormat above every LocalDateTime datatype.
first add the dependency : 

<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;/dependency&gt;
</code></pre>

Add the following bean : 

<pre><code>@Configuration
public class Java8DateTimeConfiguration {
 /**
 * Customizing
 * http://docs.spring.io/spring-boot/docs/current/reference/html/howto-spring-mvc.html
 *
 * Defining a @Bean of type Jackson2ObjectMapperBuilder will allow you to customize both default ObjectMapper and XmlMapper (used in MappingJackson2HttpMessageConverter and MappingJackson2XmlHttpMessageConverter respectively).
 */
 @Bean
 public Module jsonMapperJava8DateTimeModule() {
 val bean = new SimpleModule();

 bean.addDeserializer (ZonedDateTime.class, new JsonDeserializer&lt;ZonedDateTime&gt;() {
 @Override
 public ZonedDateTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
 return ZonedDateTime.parse(jsonParser.getValueAsString(), DateTimeFormatter.ISO_ZONED_DATE_TIME);
 }
 });

 bean.addDeserializer(LocalDateTime.class, new JsonDeserializer&lt;LocalDateTime&gt;() {
 @Override
 public LocalDateTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
 return LocalDateTime.parse(jsonParser.getValueAsString(), DateTimeFormatter.ISO_LOCAL_DATE_TIME);
 }
 });

 bean.addSerializer(ZonedDateTime.class, new JsonSerializer&lt;ZonedDateTime&gt;() {
 @Override
 public void serialize(
 ZonedDateTime zonedDateTime, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
 throws IOException {
 jsonGenerator.writeString(DateTimeFormatter.ISO_ZONED_DATE_TIME.format(zonedDateTime));
 }
 });

 bean.addSerializer(LocalDateTime.class, new JsonSerializer&lt;LocalDateTime&gt;() {
 @Override
 public void serialize(
 LocalDateTime localDateTime, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
 throws IOException {
 jsonGenerator.writeString(DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(localDateTime));
 }
 });

 return bean;
 }
}
</code></pre>

in your config file add the following : 

<pre><code>@Import(Java8DateTimeConfiguration.class)
</code></pre>

This will serialize and de-serialize all properties LocalDateTime and ZonedDateTime as long as you are using objectMapper created by spring.

The format that you got for ZonedDateTime is : "2017-12-27T08:55:17.317+02:00[Asia/Jerusalem]"
for LocalDateTime is : "2017-12-27T09:05:30.523"

blocks|key|3612|text|这样就可以正常工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3613|添加依赖项：|3614|<dependency>
++++<groupId>com.fasterxml.jackson.datatype</groupId>
++++<artifactId>jackson-datatype-jdk8</artifactId>
</dependency>|code-block|syntax|javascript|3615|添加注释：|3616|@JsonFormat(pattern="yyyy-MM-dd")|3617|现在，您必须获得正确的格式。|3618|要使用对象映射器，您需要注册JavaTime|3619|ObjectMapper+mapper+=+new+ObjectMapper();
mapper.registerModule(new+JavaTimeModule());|3620|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|11|8|@]|9|@]|A|$G|H]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

This work fine:

Add the dependency:

<pre><code>&lt;dependency&gt;
 &lt;groupId&gt;com.fasterxml.jackson.datatype&lt;/groupId&gt;
 &lt;artifactId&gt;jackson-datatype-jdk8&lt;/artifactId&gt;
&lt;/dependency&gt;
</code></pre>

Add the annotation:

<pre><code>@JsonFormat(pattern="yyyy-MM-dd")
</code></pre>

Now, you must get the correct format.

To use object mapper, you need register the JavaTime

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

blocks|key|3655|text|对于以下依赖项，@JsonDeserialize(using=+LocalDateDeserializer.class)不适用于我。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3656|<dependency>
++++<groupId>com.fasterxml.jackson.datatype</groupId>
++++<artifactId>jackson-datatype-jsr310</artifactId>
++++<version>+2.9.6</version>
</dependency>|code-block|syntax|javascript|3657|我使用下面的代码转换器将日期反序列化为java.sql.Date。|3658|import+javax.persistence.AttributeConverter;
import+javax.persistence.Converter;


@SuppressWarnings("UnusedDeclaration")
@Converter(autoApply+=+true)
public+class+LocalDateConverter+implements+AttributeConverter<java.time.LocalDate,+java.sql.Date>+{


++++@Override
++++public+java.sql.Date+convertToDatabaseColumn(java.time.LocalDate+attribute)+{

++++++++return+attribute+==+null+?+null+:+java.sql.Date.valueOf(attribute);
++++}

++++@Override
++++public+java.time.LocalDate+convertToEntityAttribute(java.sql.Date+dbData)+{

++++++++return+dbData+==+null+?+null+:+dbData.toLocalDate();
++++}
}|3659|entityMap^0|8|1G|0|0|J|D|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

<code>@JsonDeserialize(using= LocalDateDeserializer.class)</code> does not work for me with the below dependency.

<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; 2.9.6&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

I have used the below code converter to deserialize the date into a <code>java.sql.Date</code>.

<pre><code>import javax.persistence.AttributeConverter;
import javax.persistence.Converter;


@SuppressWarnings("UnusedDeclaration")
@Converter(autoApply = true)
public class LocalDateConverter implements AttributeConverter&lt;java.time.LocalDate, java.sql.Date&gt; {


 @Override
 public java.sql.Date convertToDatabaseColumn(java.time.LocalDate attribute) {

 return attribute == null ? null : java.sql.Date.valueOf(attribute);
 }

 @Override
 public java.time.LocalDate convertToEntityAttribute(java.sql.Date dbData) {

 return dbData == null ? null : dbData.toLocalDate();
 }
}
</code></pre>

blocks|key|4511179|text|写这个答案也是为了提醒我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511180|我在这里组合了几个答案，最后我的答案是这样的。(我使用的是SpringBoot+1.5.7和Lombok1.16.16)|4511181|@Data
public+Class+someClass+{

+++@DateTimeFormat(iso+=+DateTimeFormat.ISO.DATE_TIME)
+++@JsonSerialize(using+=+LocalDateTimeSerializer.class)
+++@JsonDeserialize(using+=+LocalDateTimeDeserializer.class)
+++private+LocalDateTime+someDate;

}|code-block|syntax|javascript|4511182|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Writing this answer as a reminder for me as well.

I combined several answers here and in the end mine worked with something like these.
(I am using SpringBoot 1.5.7 and Lombok 1.16.16)

<pre><code>@Data
public Class someClass {

 @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
 @JsonSerialize(using = LocalDateTimeSerializer.class)
 @JsonDeserialize(using = LocalDateTimeDeserializer.class)
 private LocalDateTime someDate;

}
</code></pre>

blocks|key|3722|text|如前所述，spring-boot将获取您需要的所有内容(对于web和webflux+starter)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3723|但更好的是-你不需要自己注册任何模块。看看here吧。由于@SpringBootApplication在幕后使用@EnableAutoConfiguration，这意味着JacksonAutoConfiguration将自动添加到上下文中。现在，如果您查看JacksonAutoConfiguration内部，您将看到：|offset|length|style|CODE|3724|++++private+void+configureModules(Jackson2ObjectMapperBuilder+builder)+{
++++++++Collection<Module>+moduleBeans+=+getBeans(this.applicationContext,
++++++++++++++++Module.class);
++++++++builder.modulesToInstall(moduleBeans.toArray(new+Module[0]));
++++}|code-block|syntax|javascript|3725|This+fella将在初始化过程中被调用，并将获取它可以在类路径中找到的所有模块。(我使用Spring+Boot+2.1)|3726|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/spring-projects/spring-boot/blob/474da80b4dc02090c19dc58acebba760161d597b/spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories#L74|1|https://github.com/spring-projects/spring-boot/blob/7be8cd68255b11da776f00e05772eb0e13f33051/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration.java#L346^0|0|T|M|1K|O|2D|O|3K|O|L|4|0|0|0|0|A|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]|$D|12|E|13|F|G]|$D|14|E|15|F|G]|$D|16|E|17|F|G]]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|H|3|I|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1C|8|@]|9|@$D|1D|E|1E|1|1F]]|A|$]]|$1|O|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]]]

As already mentioned, spring-boot will fetch all you need (for both web and webflux starter).

But what's even better - you don't need to register any modules yourself.
Take a look <a href="https://github.com/spring-projects/spring-boot/blob/474da80b4dc02090c19dc58acebba760161d597b/spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories#L74" rel="nofollow noreferrer">here</a>. Since <code>@SpringBootApplication</code> uses <code>@EnableAutoConfiguration</code> under the hood, it means <code>JacksonAutoConfiguration</code> will be added to the context automatically.
Now, if you look inside <code>JacksonAutoConfiguration</code>, you will see:

<pre><code> private void configureModules(Jackson2ObjectMapperBuilder builder) {
 Collection&lt;Module&gt; moduleBeans = getBeans(this.applicationContext,
 Module.class);
 builder.modulesToInstall(moduleBeans.toArray(new Module[0]));
 }
</code></pre>

<a href="https://github.com/spring-projects/spring-boot/blob/7be8cd68255b11da776f00e05772eb0e13f33051/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration.java#L346" rel="nofollow noreferrer">This fella</a> will be called in the process of initialization and will fetch all the modules it can find in the classpath.
(I use Spring Boot 2.1)

blocks|key|3760|text|我使用的是Springboot+2.0.6，由于某些原因，应用程序yml的更改不起作用。而且我也有更多的要求。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3761|我尝试创建ObjectMapper并将其标记为主要，但spring+boot抱怨我已经将jacksonObjectMapper标记为主要！！|3762|这就是我所做的。我对内部映射器进行了更改。|3763|我的序列化程序和反序列化程序是特别的-它们处理'dd/MM/YYYY'；而在反序列化时-它尽量使用3-4种流行的格式，以确保我有一些LocalDate。|3764|@Autowired
ObjectMapper+mapper;

@PostConstruct
public+ObjectMapper+configureMapper()+{
++++mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
++++mapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);

++++mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,+false);
++++mapper.configure(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS,+true);

++++mapper.configure(MapperFeature.ALLOW_COERCION_OF_SCALARS,+true);
++++mapper.configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY,+true);

++++SimpleModule+module+=+new+SimpleModule();
++++module.addDeserializer(LocalDate.class,+new+LocalDateDeserializer());
++++module.addSerializer(LocalDate.class,+new+LocalDateSerializer());
++++mapper.registerModule(module);

++++return+mapper;
}|code-block|syntax|javascript|3765|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I am using Springboot 2.0.6 and for some reason, the app yml changes did not work.
And also I had more requirements.

I tried creating ObjectMapper and marking it as Primary but spring boot complained that I already have jacksonObjectMapper as marked Primary!!

So this is what I did.
I made changes to the internal mapper.

My Serializer and Deserializer are special - they deal with 'dd/MM/YYYY'; and while de-serializing - it tries its best to use 3-4 popular format to make sure I have some LocalDate.

<pre><code>@Autowired
ObjectMapper mapper;

@PostConstruct
public ObjectMapper configureMapper() {
 mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
 mapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);

 mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 mapper.configure(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS, true);

 mapper.configure(MapperFeature.ALLOW_COERCION_OF_SCALARS, true);
 mapper.configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY, true);

 SimpleModule module = new SimpleModule();
 module.addDeserializer(LocalDate.class, new LocalDateDeserializer());
 module.addSerializer(LocalDate.class, new LocalDateSerializer());
 mapper.registerModule(module);

 return mapper;
}
</code></pre>

blocks|key|4511268|text|只需使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511269|@JsonFormat(pattern="10/04/2019")|code-block|syntax|javascript|4511270|或者您可以根据自己的喜好使用模式，例如：('-'+in+place+of+'/')|offset|length|style|CODE|4511271|entityMap^0|0|0|K|L|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

simply use:

<pre><code>@JsonFormat(pattern="10/04/2019")
</code></pre>

or you can use pattern as you like for e.g: <code>('-' in place of '/')</code>

blocks|key|4511279|text|这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511280|import+com.fasterxml.jackson.annotation.JsonFormat;
import+com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import+com.fasterxml.jackson.databind.annotation.JsonSerialize;
import+com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import+com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
public+Class+someClass+{

++++@JsonFormat(pattern+=+"yyyy-MM-dd+HH:mm:ss")
++++@JsonSerialize(using+=+LocalDateTimeSerializer.class)
++++@JsonDeserialize(using+=+LocalDateTimeDeserializer.class)
++++private+LocalDateTime+sinceDate;

}|code-block|syntax|javascript|4511281|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This worked for me. 
<pre><code>import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
public Class someClass {

 @JsonFormat(pattern = &quot;yyyy-MM-dd HH:mm:ss&quot;)
 @JsonSerialize(using = LocalDateTimeSerializer.class)
 @JsonDeserialize(using = LocalDateTimeDeserializer.class)
 private LocalDateTime sinceDate;

}

</code></pre>

blocks|key|4511322|text|已添加|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4511323|group:+'com.fasterxml.jackson.datatype',+name:+'jackson-datatype-jsr310',+version:+'2.8.8'|code-block|syntax|javascript|4511324|到gradle编译块中|4511325|在application.yml文件中|offset|length|style|CODE|4511326|spring:
++jackson:
++++serialization:
++++++write_dates_as_timestamps:+false|4511327|如果您使用的是application.properties文件，请添加以下内容|4511328|spring.jackson.serialization.write_dates_as_timestamps=false|4511329|如果要应用自定义格式，可以应用注解|4511330|++++@JsonFormat(pattern+=+"yyyy-MMMM-dd+hh:mm:ss")
++++private+LocalDateTime+date;|4511331|它开始很好地为我工作|4511332|entityMap^0|0|0|0|1|F|0|0|7|M|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|15|8|@$K|16|L|17|M|N]]|9|@]|A|$]]|$1|O|3|P|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|19|8|@$K|1A|L|1B|M|N]]|9|@]|A|$]]|$1|S|3|T|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1D|8|@]|9|@]|A|$]]|$1|W|3|X|5|D|7|1E|8|@]|9|@]|A|$E|F]]|$1|Y|3|Z|5|6|7|1F|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|11|$]]

Added
<pre><code>group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: '2.8.8'
</code></pre>
into gradle compile block
and in the <code>application.yml</code> file
<pre><code>spring:
 jackson:
 serialization:
 write_dates_as_timestamps: false
</code></pre>
if you are using <code>application.properties</code> file
add the following
<pre><code>spring.jackson.serialization.write_dates_as_timestamps=false
</code></pre>
in case you want to apply a custom format you can apply the annotation
<pre><code> @JsonFormat(pattern = &quot;yyyy-MMMM-dd hh:mm:ss&quot;)
 private LocalDateTime date;
</code></pre>
It started working fine for me

I'm having a small problem with formatting a Java 8 LocalDateTime in my Spring Boot Application. With 'normal' dates I have no problem, but the LocalDateTime fields are converted to the following:

<pre><code>"startDate" : {
 "year" : 2010,
 "month" : "JANUARY",
 "dayOfMonth" : 1,
 "dayOfWeek" : "FRIDAY",
 "dayOfYear" : 1,
 "monthValue" : 1,
 "hour" : 2,
 "minute" : 2,
 "second" : 0,
 "nano" : 0,
 "chronology" : {
 "id" : "ISO",
 "calendarType" : "iso8601"
 }
 }
</code></pre>

While I would like convert it to something like:

<pre><code>"startDate": "2015-01-01"
</code></pre>

My code looks like this:

<pre><code>@JsonFormat(pattern="yyyy-MM-dd")
@DateTimeFormat(iso = DateTimeFormat.ISO.TIME)
public LocalDateTime getStartDate() {
 return startDate;
}
</code></pre>

But either of the above annotations don't work, the date keeps getting formatted like above. Suggestions welcome!

JSON Java 8 LocalDateTime format in Spring Boot

Spring Boot

我在Spring Boot应用程序中格式化Java8 LocalDateTime时遇到了一个小问题。对于'normal‘日期，我没有问题，但是LocalDateTime字段被转换为以下内容："startDate" : {    "year" : 2010,    "month" : "JANUARY",    "day...

问Spring Boot中的JSON Java 8 LocalDateTime格式
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