unity webgl中获得java的数据，有接口地址，请求方式为POST，请求参数为{ "metroid": 279 }，返回结果为{ "returnCode": 0, "returnMessage": "调用成功", "data": [ { "doorfaultcount": 7, "doorsubhealthcount": 0, "carriageid": 1738, "carriageno": "01011", "carriagename": "HHHT01011", "doorinfolist": [ { "sort": 0, "doorid": 17414, "doorno": "222222222222222", "doorbusno": "01011", "side": "左", "pairid": null, "iskeydoor": false, "statuscode": "FAULT", "isfaultandsubhealth": null, "repaircode": "NOMAL", "exceptioncode": "NOMAL", "statusname": "故障", "faultcode": null, "faultname": null, "time": null, "updown": null, "paramvalueid1": null, "paramvalueid2": null, "paramvalueid3": null, "paramvalueid4": null, "paramvalueid5": null, "dataid": null, "doorstatus": 1 }，获得返回结果中的 "carriageno"数据，将获得没每一 "carriageno"数据分配给一个按钮，总共6个按钮，unity webgl中操作步骤和完整代码怎么写

在Unity WebGL中获得Java数据，可以使用UnityWebRequest类来发送POST请求并获取响应数据。下面是操作步骤和完整代码：

1. 创建一个空的GameObject，并给它添加一个空的脚本。

2. 在脚本中添加以下代码：

using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
using System.Collections.Generic;

public class GetCarriageData : MonoBehaviour
{
    private const string URL = "接口地址";
    private const string POST_DATA = "{\"metroid\": 279}";

    public GameObject[] buttons;

    void Start()
    {
        StartCoroutine(GetData());
    }

    IEnumerator GetData()
    {
        UnityWebRequest request = UnityWebRequest.Post(URL, POST_DATA);
        request.method = "POST";
        request.SetRequestHeader("Content-Type", "application/json");
        yield return request.SendWebRequest();

        if (request.isNetworkError || request.isHttpError)
        {
            Debug.LogError(request.error);
        }
        else
        {
            string result = request.downloadHandler.text;
            Debug.Log(result);

            CarriageData carriageData = JsonUtility.FromJson<CarriageData>(result);

            for (int i = 0; i < buttons.Length; i++)
            {
                buttons[i].GetComponentInChildren<UnityEngine.UI.Text>().text = carriageData.data[i].carriageno;
            }
        }
    }
}

[System.Serializable]
public class DoorInfo
{
    public int sort;
    public int doorid;
    public string doorno;
    public string doorbusno;
    public string side;
    public object pairid;
    public bool iskeydoor;
    public string statuscode;
    public object isfaultandsubhealth;
    public string repaircode;
    public string exceptioncode;
    public string statusname;
    public object faultcode;
    public object faultname;
    public object time;
    public object updown;
    public object paramvalueid1;
    public object paramvalueid2;
    public object paramvalueid3;
    public object paramvalueid4;
    public object paramvalueid5;
    public object dataid;
    public int doorstatus;
}

[System.Serializable]
public class CarriageData
{
    public int returnCode;
    public string returnMessage;
    public List<DoorInfo> data;
}

3. 将上面的代码复制到脚本中，并将接口地址替换为实际的地址。在脚本中定义一个GameObject数组，存储6个按钮。在Start方法中调用GetData协程。

4. 在GetData协程中，使用UnityWebRequest发送POST请求，并等待响应。如果请求发生网络错误或HTTP错误，则打印错误信息。否则，从响应中获取字符串数据，并使用JsonUtility将其转换为CarriageData对象。然后，将每个"carriageno"数据分配给一个按钮。

5. 将脚本挂载到空的GameObject上，并将6个按钮分别拖到buttons数组中。

这样就完成了在Unity WebGL中获得Java数据并将其分配给6个按钮的操作。