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

时间：2017-10-25 16:22:55

标签： java spring-boot java-8 jackson

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

}

杰克逊正在格式化它：

{
    "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。 顺便说一下，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

任何想法为什么日期没有像那样格式化而不是使用我提供的模式？

2 个答案:

答案 0 :(得分：3)

刚检查了我的项目。我的解串器：

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.ObjectCodec;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;

import java.io.IOException;
import java.time.LocalDateTime;

import static java.time.format.DateTimeFormatter.ISO_LOCAL_DATE_TIME;

public class JsonDateTimeDeserializer extends JsonDeserializer<LocalDateTime> {

private static final String NULL_VALUE = "null";

@Override
public LocalDateTime deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException {
    ObjectCodec oc = jp.getCodec();
    JsonNode node = oc.readTree(jp);
    String dateString = node.textValue();

    LocalDateTime dateTime = null;
    if (!NULL_VALUE.equals(dateString)) {
        dateTime = LocalDateTime.parse(dateString, ISO_LOCAL_DATE_TIME);
    }
    return dateTime;
}
}

我的序列化器：

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.time.LocalDateTime;

import static java.time.format.DateTimeFormatter.ISO_LOCAL_DATE_TIME;

public class JsonLocalDateTimeSerializer extends JsonSerializer<LocalDateTime> {
@Override
public void serialize(LocalDateTime dateTime, JsonGenerator generator, SerializerProvider provider)
        throws IOException {

    String dateTimeString = dateTime.format(ISO_LOCAL_DATE_TIME);
    generator.writeString(dateTimeString);
}
}

您需要设置自己的格式化程序。

在我的RestConfig中，我有：

@Configuration
@ComponentScan(value = {"ru.outofrange.controller"})
public class RestConfig extends RepositoryRestConfigurerAdapter {

@Override
public void configureJacksonObjectMapper(ObjectMapper objectMapper) {
    objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
    objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
    objectMapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);

    registerSerializerDeserializer(objectMapper);
}

private void registerSerializerDeserializer(ObjectMapper objectMapper) {
    SimpleModule module = new SimpleModule();

    module.addSerializer(LocalDateTime.class, new JsonLocalDateTimeSerializer());
    module.addDeserializer(LocalDateTime.class, new JsonDateTimeDeserializer());

    objectMapper.registerModule(module);
}

}

答案 1 :(得分：2)

我尝试重现您的示例并且效果很好。

＆＃xA;＆＃xA;

MyEntity

＆＃xA;＆＃xA; < pre> public class MyEntity {＆＃xA; private Integer id;＆＃xA; @JsonFormat（shape = JsonFormat.Shape.STRING，pattern =“yyyy-MM-dd'T'HH：mm：ss'Z'”）＆＃xA; private LocalDateTime time;＆＃xA;＆＃xA; public MyEntity（Integer id，LocalDateTime time）{＆＃xA; this.id = id;＆＃xA; this.time = time;＆＃xA; }＆＃XA;＆＃XA; public Integer getId（）{＆＃xA; return id;＆＃xA; }＆＃XA;＆＃XA; public void setId（Integer id）{＆＃xA; this.id = id;＆＃xA; }＆＃XA;＆＃XA; public LocalDateTime getTime（）{＆＃xA;返回时间;＆＃xA; }＆＃XA;＆＃XA; public void setTime（LocalDateTime time）{＆＃xA; this.time = time;＆＃xA; }＆＃XA;}＆＃XA; ＆＃XA;＆＃XA;

<代码> LocalDateTimeApplication

＆＃XA;＆＃XA; < pre> @ SpringBootApplication＆＃xA; public class LocalDateTimeApplication {＆＃xA;＆＃xA; public static void main（String [] args）{＆＃xA; SpringApplication.run（LocalDateTimeApplication.class，args）;＆＃xA; }＆＃XA;}＆＃XA; ＆＃XA;＆＃XA;

<代码> SomeController

＆＃XA;＆＃XA; < pre> @ RestController＆＃xA; @RequestMapping（“/ SomeController”）＆＃xA; public class SomeController {＆＃xA;＆＃xA; @RequestMapping（method = RequestMethod.GET）＆＃xA; public ResponseEntity＆lt; Object＆gt; getMyEntity（）{＆＃xA; MyEntity entity = new MyEntity（1，LocalDateTime.now（））;＆＃xA;返回新的ResponseEntity＆lt; Object＆gt;（entity，HttpStatus.OK）;＆＃xA; }＆＃XA;}＆＃XA; ＆＃XA;＆＃XA;

<代码>的pom.xml

＆＃XA;＆＃XA ; 
 ＆lt;？xml version =“1.0”encoding =“UTF-8”？＆gt;＆＃xA;＆lt; project xmlns =“http://maven.apache.org/POM/4.0。 0“xmlns：xsi =”http://www.w3.org/2001/XMLSchema-instance“＆＃xA; xsi：schemaLocation =“http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 ＆LT; modelVersion＆GT; 4.0.0＆LT; / modelVersion＆GT;＆＃XA;＆＃XA; ＆LT;＆的groupId GT; com.so.example＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT; localDateTime＆LT; / artifactId的＆GT;＆＃XA; ＆LT;版本＆GT; 0.0.1-快照LT; /版本＆GT;＆＃XA; ＆LT;包装和GT;罐子＆LT; /包装＆GT;＆＃XA;＆＃XA; ＆LT;名称＆gt;＆localDateTime LT; /名称＆gt;＆＃XA; ＆lt; description＆gt; Spring Boot的演示项目＆lt; / description＆gt;＆＃xA;＆＃xA; ＆LT亲本GT;＆＃XA; ＆LT;＆的groupId GT; org.springframework.boot＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;弹簧引导起动 - 亲本LT; / artifactId的＆GT;＆＃XA; ＆LT;版本＆GT; 1.5.8.RELEASE＆LT; /版本＆GT;＆＃XA; ＆LT; relativePath /＆GT;＆＃XA; ＆LT; /亲本GT;＆＃XA; ＆LT;性状＆gt;＆＃XA; ＆LT; project.build.sourceEncoding＆GT; UTF-8＆LT; /project.build.sourceEncoding>＆＃XA; ＆LT; project.reporting.outputEncoding＆GT; UTF-8＆LT; /project.reporting.outputEncoding>＆＃XA; ＆LT; java.version＆GT; 1.8＆LT; /java.version>＆＃XA; ＆LT; /性状＆gt;＆＃XA;＆＃XA; ＆LT;依赖性＆GT;＆＃XA; ＆LT;依赖性＆GT;＆＃XA; ＆LT;＆的groupId GT; org.springframework.boot＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;弹簧引导起动＆LT; / artifactId的＆GT;＆＃XA; ＆LT; /依赖性＆GT;＆＃XA; ＆LT;依赖性＆GT;＆＃XA; ＆LT;＆的groupId GT; org.springframework.boot＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;弹簧引导起动试验＆LT; / artifactId的＆GT;＆＃XA; ＆LT;范围＆GT;试验＆LT; /范围＆GT;＆＃XA; ＆LT; /依赖性＆GT;＆＃XA; ＆LT;依赖性＆GT;＆＃XA; ＆LT;＆的groupId GT; com.fasterxml.jackson.datatype＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;杰克逊 - 数据类型-jsr310＆LT; / artifactId的＆GT;＆＃XA; ＆LT;版本＆GT; 2.9.2＆LT; /版本＆GT;＆＃XA; ＆LT; /依赖性＆GT;＆＃XA; ＆LT;依赖性＆GT;＆＃XA; ＆LT;＆的groupId GT; org.springframework.boot＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;弹簧引导起动的Web＆LT; / artifactId的＆GT;＆＃XA; ＆LT;版本＆GT; RELEASE＆LT; /版本＆GT;＆＃XA; ＆LT; /依赖性＆GT;＆＃XA; ＆LT; /依赖性＆GT;＆＃XA;＆＃XA; ＆LT;建立＆GT;＆＃XA; ＆LT;插件＆GT;＆＃XA; ＆LT;插件＆GT;＆＃XA; ＆LT;＆的groupId GT; org.springframework.boot＆LT; /＆的groupId GT;＆＃XA; ＆LT; artifactId的＆GT;弹簧引导行家-插件＆LT; / artifactId的＆GT;＆＃XA; ＆LT; /插件＆GT;＆＃XA; ＆LT; /插件＆GT;＆＃XA; ＆LT; /构建＆GT;＆＃XA;＆LT; /项目＆GT;＆＃XA;
＆＃XA;＆＃XA;
＆＃XA;＆＃XA;

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＆＃XA;
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