问题

以下是您要翻译的内容：

我有如下字符串，

value = {"name":"John","timeStamp":"2020-08-11T13:31:31"}

我的Pojo类如下，

@Getter
@ToString
@AllArgsConstructor
@NoArgsConstructor
class Person{

private String name;	

@JsonFormat(pattern = "YYYY-MM-dd HH:mm", shape = JsonFormat.Shape.STRING)
@JsonSerialize(using = LocalDateTimeSerializer.class)
private LocalDateTime timeStamp; 

}

根据 https://github.com/FasterXML/jackson-modules-java8 ，我使用以下依赖项，

com.fasterxml.jackson.module
jackson-module-parameter-names
2.11.1


com.fasterxml.jackson.datatype
jackson-datatype-jdk8
2.11.1


com.fasterxml.jackson.datatype
jackson-datatype-jsr310
2.11.1

```

我使用以下配置，

 final ObjectMapper objectMapper = JsonMapper.builder()
                        .addModule(new ParameterNamesModule())
                        .addModule(new Jdk8Module())
                        .addModule(new JavaTimeModule())
                        .build();

objectMapper.readValue(value, Person.class)

我得到以下异常，

Caused by: java.io.NotSerializableException: java.time.format.DateTimeFormatter

我也尝试了以下在timeStamp中，但没有运气

 @JsonFormat(pattern = "yyy-MM-ddThh:mm:ss")

<details>
<summary>英文:</summary>

I have String as below,

value = {"name":"John","timeStamp":"2020-08-11T13:31:31"}

My Pojo class is,

@Getter
@ToString
@AllArgsConstructor
@NoArgsConstructor
class Person{

private String name;	

@JsonFormat(pattern = "YYYY-MM-dd HH:mm", shape = JsonFormat.Shape.STRING)
@JsonSerialize(using = LocalDateTimeSerializer.class)
private LocalDateTime timeStamp; 

}

I use the below artifact, as per https://github.com/FasterXML/jackson-modules-java8

<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-parameter-names</artifactId>
<version>2.11.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jdk8</artifactId>
<version>2.11.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.11.1</version>
</dependency>

I use the below config,

final ObjectMapper objectMapper = JsonMapper.builder()
.addModule(new ParameterNamesModule())
.addModule(new Jdk8Module())
.addModule(new JavaTimeModule())
.build();

objectMapper.readValue(value, Person.class)

I'm getting the below exception,

Caused by: java.io.NotSerializableException: java.time.format.DateTimeFormatter

I tried with the below in the timeStamp also, but no luck

@JsonFormat(pattern = "yyy-MM-ddThh:mm:ss")

</details>


# 答案1
**得分**: 1

The ISO format you're showing is the default so no need to get complicated and it should work!

```java
class Person {
    private String name;
    private LocalDateTime timeStamp;
}

PS. suggest you use jackson-bom managed dependencies to avoid 2.11.1 appearing all over the place. See https://stackoverflow.com/questions/14874966/how-to-use-bom-file-with-maven for a BOM example.

class Person {
    private String name;    
    private LocalDateTime timeStamp; 
}