[Unity][JAVA][JSON]JSON must represent an object type

在JAVA服务器与Unity客户端使用JSON进行数据通讯时,遇到"JSON must represent an object type"错误。原因是Unity的JsonUtility仅能识别JSON对象而非数组。解决方法包括确保JSON为对象类型,其中包含数组,且Unity代码中数组直接赋值,变量名需一致,并进行序列化操作。参考多个资料来理解和修正此问题。

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JAVA服务器与Unity客户端通过JSON进行数据的通讯,出现的错误。

 

出现这个错误,通常是因为 JAVA的JSON和Unity的JsonUtility识别的JSON是不一样的。具体参照参考资料1和2。

JSON must represent an object type.

下面的这个是JSON数组,错误的

[
{"world":0,"name":"","equips":[],"characterid":1},
{"world":0,"name":"543453","equips":["01040002","01060002","01072005","01302000"],"characterid":8}
]

 

下面这种是JSON对象,这个JSON对象里面包含了数组,正确的

{
"role":[{"world":0,"name":"","equips":[],"characterid":1},
{"world":0,"name":"543453","equips":["01040002","01060002","01072005","01302000"]
}

 

Unity的JsonUtility通常只能识别JSON对象

在Unity中的代码如下所示:

...
using UnityEngine;//JsonUtility
...
Start()
{
        data1 data1 = JsonUtility.FromJson<data1>(msg);//获得单个JSON对象
        if (data1 == null)
        {
            Debug.Log("============= data1 
Unity "System.ArgumentException: JSON must represent an object type.\r\n at (wrapper managed-to-native) UnityEngine.JsonUtility.FromJsonInternal(string,object,System.Type)\r\n at UnityEngine.JsonUtility.FromJson (System.String json, System.Type type) [0x0005c] in <d773524469e64e608a0d15b877a002d5>:0 \r\n at UnityEngine.JsonUtility.FromJson[T] (System.String json) [0x00001] in <d773524469e64e608a0d15b877a002d5>:0 \r\n at GameConfig+<>c__DisplayClass13_0`1[T].<LoadListAsync>b__0 (UnityEngine.TextAsset asset) [0x00014] in E:\\work\\ShootingRumble\\shootingrumble\\Assets\\_Scripts\\Config\\GameConfig.cs:95 \r\n at AssetsManager+<>c__DisplayClass1_0`1[T].<LoadAssetsAsyncByLabel>b__0 (T handle) [0x00001] in E:\\work\\ShootingRumble\\shootingrumble\\Assets\\_Scripts\\Core\\Manager\\AssetsManager.cs:35 \r\n at UnityEngine.ResourceManagement.ResourceManager+<>c__DisplayClass92_0`1[TObject].<ProvideResources>b__0 (UnityEngine.ResourceManagement.AsyncOperations.AsyncOperationHandle x) [0x00000] in E:\\work\\ShootingRumble\\shootingrumble\\Library\\PackageCache\\com.unity.addressables@1.19.19\\Runtime\\ResourceManager\\ResourceManager.cs:746 \r\n at UnityEngine.ResourceManagement.AsyncOperations.AsyncOperationBase`1+<>c__DisplayClass57_0[TObject].<add_CompletedTypeless>b__0 (UnityEngine.ResourceManagement.AsyncOperations.AsyncOperationHandle`1[TObject] s) [0x00000] in E:\\work\\ShootingRumble\\shootingrumble\\Library\\PackageCache\\com.unity.addressables@1.19.19\\Runtime\\ResourceManager\\AsyncOperations\\AsyncOperationBase.cs:286 \r\n at DelegateList`1[T].Invoke (T res) [0x00038] in E:\\work\\ShootingRumble\\shootingrumble\\Library\\PackageCache\\com.unity.addressables@1.19.19\\Runtime\\ResourceManager\\Util\\DelegateList.cs:69 "
06-08
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