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java - Java REST 客户端 - javax.ws.rs.ProcessingException: javax/xml/bind/annotation/XmlTransient

问题描述

我正在使用 Java 1.7 并尝试创建一个客户端来查询 REST api。

但是，执行客户端时出现以下错误。我在 REST 服务中设置了一个断点，但它永远无法到达。

错误

javax.ws.rs.ProcessingException: javax/xml/bind/annotation/XmlTransient

问题

任何想法我如何修复客户端？

代码

pom.xml

    <!-- JAX-RS 2.x Client RI -->
    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
    </dependency>

客户端.java

import javax.ws.rs.BadRequestException;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

private static final String approvalSubmitUrl = "http://localhost:8081/rest/approvals-status/{evaluationRequestId}";

public Object getStatus(String evaluationRequestId, EvaluationProvidedNotification providedNotification) {
    logger.info(approvalSubmitUrl);
    EvaluationProvidedNotificationDTO evaluationProvidedNotificationDTO = new EvaluationProvidedNotificationDTO();
    map(providedNotification, evaluationProvidedNotificationDTO);
    try {
        logger.info("Sending request to get status from " + approvalSubmitUrl + " (nexct-approval-service)");
        Client client = ClientBuilder.newClient();
        WebTarget target = client.target(approvalSubmitUrl);
        Response response = target.queryParam("evaluationRequestId", evaluationRequestId)
                .request(MediaType.APPLICATION_JSON_TYPE).post(Entity.json(evaluationProvidedNotificationDTO));
        StatusResponse statusResponse = response.readEntity(StatusResponse.class);
        logger.info("Successfully got the status: " + statusResponse.status );
    }
    catch (BadRequestException refused) {
        logger.error("Request to: " + approvalSubmitUrl + " REFUSED: " + refused.getMessage());
    }
    catch (Exception e) {
        logger.error("Failed to get status from " + approvalSubmitUrl, e);
    }
    return null;
}

该服务仅供参考，因为我确信错误是客户端错误的结果。

Service.java（使用 Java 14 的 Springboot）

@PostMapping(value = "/rest/approvals-status/{evaluationRequestId}", consumes=MediaType.APPLICATION_JSON_VALUE, produces={MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE})
public @ResponseBody ResponseEntity<StatusDTO> getStatus(@PathVariable String evaluationRequestId, @RequestBody EvaluationProvidedNotificationDTO providedNotificationDTO) {
    StatusDTO status = new StatusDTO();
    status.setEvaluationRequestId(evaluationRequestId);
    if (providedNotificationDTO.outcome == EvaluationProvidedNotificationDTO.Evaluation.Approved) {
        if (pendingApprovals(evaluationRequestId)) {
            status.setStatus(StatusDTO.Status.Wait);
        } else {
            status.setStatus(StatusDTO.Status.Proceed);
        }
    } else {
        status.setStatus(StatusDTO.Status.Wait);
    }
    return ResponseEntity.ok(status);
}

这是要发布的对象：

评估提供通知DTO.java

public class EvaluationProvidedNotificationDTO {

    public enum Evaluation {
        Approved, Rejected;
    }

    //any contraints on the request for example cost constraints
    public List<Serializable> constraints;

    //the outcome of the evaluation
    public Evaluation outcome;

    //any messages that the evaluator wants to send to the requestor
    public String messageToRequestor;

    public List<Serializable> getConstraints() {
        return constraints;
    }

    public void setConstraints(List<Serializable> constraints) {
        this.constraints = constraints;
    }

    public Evaluation getOutcome() {
        return outcome;
    }

    public void setOutcome(Evaluation outcome) {
        this.outcome = outcome;
    }

    public String getMessageToRequestor() {
        return messageToRequestor;
    }

    public void setMessageToRequestor(String messageToRequestor) {
        this.messageToRequestor = messageToRequestor;
    }
}

标签： javarestjax-rs

解决方案

我设法通过将 POJO 转换为 JSON 来解决这个问题：

        Invocation.Builder builder = target.request();
        Gson gson = new Gson();
        String json = gson.toJson(evaluationProvidedNotificationDTO);
        Entity entity = Entity.entity(json, MediaType.APPLICATION_JSON_TYPE);
        Response response = builder.post(entity);
        StatusResponse statusResponse = response.readEntity(StatusResponse.class);

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