Spring Boot-Jersey Client-Jackson无法构造`java.time.Instant`的实例

编程问答 2022-06-11

问题描述

使用Jersey Client 2.28，我试图接收包含以下数据的DTO：

{
    "entityId": "0de46a94-bc95-437f-9eca-dcfd60f7aed3","productId": "9c328c45-deba-4b84-8fb4-0d2aea885fc0","status": "ACTIVE","startDatetime": "2020-05-12T08:54:23Z","endDatetime": null,}

收到它时，出现以下错误：

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.Instant` (no Creators,like default construct,exist): no String-argument constructor/factory method to deserialize from String value ('2020-05-12T08:54:23Z')
 at [Source: (org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream); line: 1,column: 190] (through reference chain: com.fundraiser.dto.OfferDto["startDatetime"])

我知道我应该能够在没有大量自定义序列化器或适配器的情况下取回它。谷歌搜索之后，似乎还有其他紧密的问题，但是没有一个解决我的问题：

serialize/deserialize java 8 java.time with Jackson JSON mapper

JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value

我尝试添加这些Maven导入的组合以使其正常工作，但是什么也没有：

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jdk8</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

如果我添加以下jersey媒体moxy，我确实会找回我的对象​​，但所有日期都将编组为null：

<dependency>
  <groupId>org.glassfish.jersey.media</groupId>
  <artifactId>jersey-media-moxy</artifactId>
  <version>2.28</version>
</dependency>

我正在使用Spring Boot 2.2.0，我的pom.xml如下所示：

<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.0.RELEASE</version>
  </parent>

  <groupId>com.test</groupId>
  <artifactId>test-webapp</artifactId>
  <version>1.0.0</version>
  <packaging>jar</packaging>
  <name>test-webapp</name>
  <url>http://maven.apache.org</url>

  <dependencies>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.8</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.glassfish.jersey.core</groupId>
      <artifactId>jersey-client</artifactId>
      <version>2.28</version>
    </dependency>
    <dependency>
      <groupId>org.glassfish.jersey.inject</groupId>
      <artifactId>jersey-hk2</artifactId>
      <version>2.28</version>
    </dependency>
    <dependency>
      <groupId>com.test</groupId>
      <artifactId>test-client</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
      <version>2.3.0.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <version>2.3.0.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-security</artifactId>
      <version>2.3.0.RELEASE</version>
    </dependency>
  </dependencies>

  <properties>
    <java.version>11</java.version>
  </properties>

  <build>
    <finalName>test-webapp</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>11</source>
          <target>11</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>repackage</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
    <defaultGoal>install</defaultGoal>
  </build>
</project>

有什么我很想念的东西吗？我只是觉得这不应该像以前那样成为一个大问题。

用于检索数据的代码：


 public TestClient() {
        this.client = ClientBuilder.newBuilder().register("application/json,*/*").build();
    }

    private WebTarget webTarget() {
        return client
                .target(baseUri)
                .path("api")
                .path("v1");
    }

    private WebTarget entityTarget() {
        return webTarget()
                .path("entity");
    }

    public DataDto getEntityById(@NonNull UUID entityId) {
// Error occurs here
        return entityTarget()
                .path(entityId.toString())
                .request(MediaType.APPLICATION_JSON)
                .get(DataDto.class);
    }

更新：添加了Dto类：

package com.test.dto;

import lombok.Data;
import lombok.experimental.Accessors;

import java.time.Instant;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

@Data
@Accessors(chain = true)
public class DataDto {
    private UUID entityId;
    private UUID productId;
    private String status;
    private Instant startDatetime;
    private Instant endDatetime;
}

解决方法

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jacksonjacksonjavajavajersey-clientmavenspring-boot