Spring Boot POST 请求对象几乎所有空字段都带有 Avro class

Question

我们有以下简单的网络服务器：

package spring;

import avro.BatteryEvent;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.Date;

@RestController
public class EnergyResourcesController {
    private final Date date = new Date();

    @PostMapping("/event/{uuid}")
    BatteryEvent postBatteryEvent(
        @PathVariable("uuid") String uuid,
        @RequestBody BatteryEvent batteryEvent) throws IOException {
        batteryEvent.setTime(date.getTime());
        return batteryEvent;
    }
}

它使用 BatteryEvent，它是 Avro 生成的 class，它是根据以下 Avro 架构构建的：

{
  "namespace": "avro",
  "type": "record",
  "name": "BatteryEvent",
  "fields": [
    {
      "name": "charging_source",
      "type": [
        "string",
        "null"
      ]
    },
    {
      "name": "processor4_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "device_id",
      "type": [
        "string",
        "null"
      ]
    },
    {
      "name": "processor2_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "processor1_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "charging",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "current_capacity",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "inverter_state",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "moduleL_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "moduleR_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "processor3_temp",
      "type": [
        "int",
        "null"
      ]
    },
    {
      "name": "soC_regulator",
      "type": [
        "float",
        "null"
      ]
    },
    {
      "name": "time",
      "type": [
        "long",
        "null"
      ],
      "logicalType": "local-timestamp-millis"
    }
  ]
}

我们向网络服务器发送以下 JSON,

{
  "charging_source": "utility",
  "processor4_temp": 160,
  "device_id": "18806072-81ca-48ed-b01a-b080f2d8a1fa",
  "processor2_temp": 96,
  "processor1_temp": 60,
  "charging": -912,
  "current_capacity": 10948,
  "inverter_state": 1,
  "moduleL_temp": 199,
  "moduleR_temp": 91,
  "processor3_temp": 152,
  "soC_regulator": 26.598085
}

问题是我们收到的 BatteryEvent 除了 charging 字段外还有所有 null 值，如下所示：

{"charging_source": null, "processor4_temp": null, "device_id": null, "processor2_temp": null, "processor1_temp": null, "charging": -261, "current_capacity": null, "inverter_state": null, "moduleL_temp": null, "moduleR_temp": null, "processor3_temp": null, "soC_regulator": null, "time": null}

我的问题是，这是为什么？所有发送的数据都是有效的 JSON，我们的 Avro class 也是有效的。我们的 Spring Boot 服务器是从 Spring Boot 自己的文档中获取的简单有效的代码。我希望 Spring Boot 投射到 BatteryEvent 对象的数据包含发送的电池事件 JSON.

的值

Answer 1

我不确定你的问题的根本原因是什么，但似乎有一些问题 JSON serialization/deserialization.

当我尝试重现您的问题时，根据您的信息，我遇到了一些异常，我使用此处提到的解决方案解决了该问题 here

在此之后，当我执行 POST API 时，我收到了包含所有值的预期结果。

你可以在这里查看我的代码here

您能否提供有关您的代码的更多信息，例如您是否修改了默认的 serialization/deserialization 流程？这将有助于更多地了解为什么在您的代码中将属性设置为 null

下面是我的示例的请求和响应

请求

{
    "charging_source": "utility",
    "processor4_temp": 160,
    "device_id": "18806072-81ca-48ed-b01a-b080f2d8a1fa",
    "processor2_temp": 96,
    "processor1_temp": 60,
    "charging": -912,
    "current_capacity": 10948,
    "inverter_state": 1,
    "moduleL_temp": 199,
    "moduleR_temp": 91,
    "processor3_temp": 152,
    "soC_regulator": 26.598085
}

回应

{
    "charging_source": "utility",
    "processor4_temp": 160,
    "device_id": "18806072-81ca-48ed-b01a-b080f2d8a1fa",
    "processor2_temp": 96,
    "processor1_temp": 60,
    "charging": -912,
    "current_capacity": 10948,
    "inverter_state": 1,
    "moduleL_temp": 199,
    "moduleR_temp": 91,
    "processor3_temp": 152,
    "soC_regulator": 26.598085,
    "time": 1609404352570,
    "moduleRTemp": 91,
    "moduleLTemp": 199,
    "inverterState": 1,
    "soCRegulator": 26.598085,
    "deviceId": "18806072-81ca-48ed-b01a-b080f2d8a1fa",
    "processor1Temp": 60,
    "currentCapacity": 10948,
    "processor3Temp": 152,
    "processor4Temp": 160,
    "chargingSource": "utility",
    "processor2Temp": 96
}

Answer 2

实体中的字段名应与json中的键名相同

Spring Boot POST 请求对象几乎所有空字段都带有 Avro class

Spring Boot POST request object has almost all null fields with Avro class

java

spring

avro

spring-boot