Spring boot + Jackson + LocalDateTime:日期未正确解析

Question

我的实体类中有一个LocalDateTime属性,但是当它被序列化时,我看不到预期的格式.

这是班级:

public class MyEntity {

     private Integer id;
     @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss'Z'")
     private LocalDateTime changeDate;

     // getters and setters

}

这就是杰克逊格式化的方式:

{
    "id": 56, 
    "changeDate": {
        "hour":14, "minute":19, 
        "nano":797000000, 
        "second":7, 
        "dayOfMonth":24, 
        "dayOfWeek":"TUESDAY", 
        "dayOfYear":297, "month":"OCTOBER", 
        "monthValue":10, 
        "year":2017,
        "chronology": { 
             "id":"ISO",
             "calendarType":"iso8601"
        }
    }
}

请注意,我将以下依赖项添加到我的pom:

<dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-jsr310</artifactId>
    </dependency>

我没有包含该版本,因为spring boot负责这一点.顺便说一句,我正在使用春季启动1.5.2.RELEASE.

我还在application.properties中包含了以下属性:

spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS = false

知道为什么日期没有格式化,而不是使用我提供的模式？

Answer 1

我尝试重现你的例子并且效果很好。

MyEntity

public class MyEntity {
    private Integer id;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss'Z'")
    private LocalDateTime time;

    public MyEntity(Integer id, LocalDateTime time) {
        this.id = id;
        this.time = time;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public LocalDateTime getTime() {
        return time;
    }

    public void setTime(LocalDateTime time) {
        this.time = time;
    }
}

LocalDateTimeApplication

@SpringBootApplication
public class LocalDateTimeApplication {

    public static void main(String[] args) {
        SpringApplication.run(LocalDateTimeApplication.class, args);
    }
}

SomeController

@RestController
@RequestMapping("/SomeController")
public class SomeController {

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Object> getMyEntity() {
        MyEntity entity = new MyEntity(1, LocalDateTime.now());
        return new ResponseEntity<Object>(entity, HttpStatus.OK);
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.so.example</groupId>
    <artifactId>localDateTime</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>localDateTime</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
        <relativePath/>
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>