Quarkus, Hibernate ORM and REST - RESTEASY008200: JSON Binding deserialization error:

Question

我正在尝试创建一个使用 Hibernate Panache 和 Rest 的项目，类似于 https://github.com/quarkusio/quarkus-quickstarts/tree/master/hibernate-orm-panache-resteasy 上的快速入门。

当我尝试 @Post 扩展 PanacheEntity 的实体时，如下所示，出现以下错误：

javax.ws.rs.ProcessingException: RESTEASY008200: JSON Binding deserialization error: Can't create instance

实体

@Entity
@Cacheable
class Trade extends PanacheEntity {

    @Column(length = 40, unique = true)
    String name;

}

休息资源

import javax.enterprise.context.ApplicationScoped;
import javax.transaction.Transactional;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;

@Path("/trades")
@ApplicationScoped
@Produces("application/json")
@Consumes("application/json")
public class TradeReporterResource {


    @POST
    @Transactional
    public Response add(Trade trade) {
        System.out.println("begin");
        //t.closePrice = trade.closePrice;
        System.out.println("persisting");
        trade.persist();
        System.out.println("persisted");
        return Response.ok(trade).build();
    }
}

Pom 依赖项

<dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.quarkus</groupId>
        <artifactId>quarkus-bom</artifactId>
        <version>${quarkus.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-hibernate-orm-panache</artifactId>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-resteasy-jsonb</artifactId>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-jdbc-postgresql</artifactId>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-junit5</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>io.rest-assured</groupId>
      <artifactId>rest-assured</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>io.quarkus</groupId>
      <artifactId>quarkus-smallrye-openapi</artifactId>
    </dependency>
  </dependencies>

问题似乎出在 Penache

当我从 Trade 实体中删除 extends PanacheEntity 时，至少我可以 POST 成功。

Answer 1

问题其实很简单，你只需要让classTrade一个publicclass.

需要注意的是，这不是 Quarkus 限制，而是 JSON-B 限制（需要 de-serialized classes 有 public 或受保护 no-arg 构造函数 - 请参阅 JSON-B 规范的第 3.7 节）