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社区首页 >问答首页 >Gson堆栈溢出Gson.fromJson

问Gson堆栈溢出Gson.fromJson
EN

Stack Overflow用户
提问于 2014-05-02 22:57:10
回答 2查看 3.3K关注 0票数 0

我正在执行一个Web，这是我的响应，但是当我尝试使用Gson库将这个JSONObject(org.json.JSONObject)转换为特定对象时，我的应用程序就会崩溃。所以我不知道为什么会发生这种事。杰森：

代码语言：javascript
复制
{
"atributos": {
    "id": "1",
    "nombre": "Cliente",
    "descripcion": "Cliente",
    "version": "1"
},
"elementos": "[{
    "id": "1",
    "name" : "akira"
},
{
    "id": "4",
    "name" : "akira"
},
{
    "id": "5",
    "name" : "akira"
},
{
    "id": "6",
    "name" : "akira"
},
{
    "id": "7",
    "name" : "akira"
},
{
    "id": "8",
    "name" : "akira"
},
{
    "id": "9",
    "name" : "akira"
},
{
    "id": "10",
    "name" : "akira"
},
{
    "id": "11",
    "name" : "akira"
},
{
    "id": "12",
    "name" : "akira"
},
{
    "id": "13",
    "name" : "akira"
},
{
    "id": "14",
    "name" : "akira"
},
{
    "id": "15",
    "name" : "akira"
},
{
    "id": "16",
    "name" : "akira"
},
{
    "id": "17",
    "name" : "akira"
},
{
    "id": "18",
    "name" : "akira"
}]"
}

错误：

代码语言：javascript
复制
    java.lang.StackOverflowError
    05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:117)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:72)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.Gson.getAdapter(Gson.java:356)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.<init>(ReflectiveTypeAdapterFactory.java:82)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:81)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:118)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:72)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.Gson.getAdapter(Gson.java:356)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.<init>(ReflectiveTypeAdapterFactory.java:82)
05-02 17:50:56.166: E/AndroidRuntime(8130):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:81)
java
android
json
gson
stack-overflow
EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2014-05-03 05:31:27

当我验证您给定的json时，它有一些错误( Json给出的示例不是有效的json )，.Your json在启动和关闭元素数组之前在元素数组中有"，这可能会在使用Gson解析json时导致堆栈溢出错误。

“元素”：“{……”

请使用json验证器站点(例如杰森林特 )来验证json。

首先，我们需要有效的json，我省略了"“，从而使您的json成为了vaild。

会是这样的

你的Json在改变后

代码语言：javascript
复制
{
"atributos": {
    "id": "1",
    "nombre": "Cliente",
    "descripcion": "Cliente",
    "version": "1"
},
"elementos": [
    {
        "id": "1",
        "name": "akira"
    },
    {
        "id": "4",
        "name": "akira"
    },
    {
        "id": "5",
        "name": "akira"
    },
    {
        "id": "6",
        "name": "akira"
    },
    {
        "id": "7",
        "name": "akira"
    },
    {
        "id": "8",
        "name": "akira"
    },
    {
        "id": "9",
        "name": "akira"
    },
    {
        "id": "10",
        "name": "akira"
    },
    {
        "id": "11",
        "name": "akira"
    },
    {
        "id": "12",
        "name": "akira"
    },
    {
        "id": "13",
        "name": "akira"
    },
    {
        "id": "14",
        "name": "akira"
    },
    {
        "id": "15",
        "name": "akira"
    },
    {
        "id": "16",
        "name": "akira"
    },
    {
        "id": "17",
        "name": "akira"
    },
    {
        "id": "18",
        "name": "akira"
    }
]
}

**现在是编码部分：**要使用Gson解析这个jsonresponse，请遵循以下步骤

创建一个类JsonResponse

代码语言：javascript
复制
public class JsonResponse {

 /*Class handle the Whole json*/

//Variable name should be same as the names given in the json response  

Atributos atributos;// Attributos class handles the data in atributos obj from the json . The variable name of Attributos should be same as the json objects ie atributos

ArrayList<ElementosObj>elementos=null;//elementos is a array which hold some datas  ,so make a class ElementosObj to handle the data in the  elementos array.


}

类Atributos

代码语言：javascript
复制
public class Atributos {

 /*Class handle the atributos obj from json*/

  //Variable name should be same as the names given in the json response
public String id = null;
public String nombre = null;
public String descripcion = null;
public String version = null;
}

类ElementosObj

代码语言：javascript
复制
public class ElementosObj {

/*Class handle the elementos array from json*/

//Variable name should be same as the names given in the json response

String id=null;
String name=null;

}

现在，在您的主要课程中，您可以解析上面的json

主类

代码语言：javascript
复制
String jsonData = "String jsonData Contain your parsed jsondata ";


    Gson mGson = new Gson();
    JsonResponse mObj1 = (JsonResponse) mGson.fromJson(jsonData,
            JsonResponse.class);

    Log.d("Atributos:ID", mObj1.atributos.id);
    Log.d("Atributos:DESCRIBTION", mObj1.atributos.descripcion);
    Log.d("Atributos:NUMBER", mObj1.atributos.nombre);
    Log.d("Atributos:VERSION", mObj1.atributos.version);

    for (int i = 0; i < mObj1.elementos.size(); i++) {
        Log.d("Elementos:ID For Postion " + i, mObj1.elementos.get(i).id);
        Log.d("Elementos:NAME For Postion " + i,
                mObj1.elementos.get(i).name);
    }

输出将如下所示

代码语言：javascript
复制
05-03 01:32:51.548: D/Atributos:ID: 1
05-03 01:32:51.548: D/Atributos:DESCRIBTION: Cliente
05-03 01:32:51.548: D/Atributos:NUMBER: Cliente
05-03 01:32:51.548: D/Atributos:VERSION: 1
05-03 01:32:51.548: D/Elementos:ID For Postion 0: 1
05-03 01:32:51.548: D/Elementos:NAME For Postion 0: akira
05-03 01:32:51.548: D/Elementos:ID For Postion 1: 4
05-03 01:32:51.558: D/Elementos:NAME For Postion 1: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 2: 5
05-03 01:32:51.558: D/Elementos:NAME For Postion 2: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 3: 6
05-03 01:32:51.558: D/Elementos:NAME For Postion 3: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 4: 7
05-03 01:32:51.558: D/Elementos:NAME For Postion 4: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 5: 8
05-03 01:32:51.558: D/Elementos:NAME For Postion 5: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 6: 9
05-03 01:32:51.558: D/Elementos:NAME For Postion 6: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 7: 10
05-03 01:32:51.558: D/Elementos:NAME For Postion 7: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 8: 11
05-03 01:32:51.558: D/Elementos:NAME For Postion 8: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 9: 12
05-03 01:32:51.558: D/Elementos:NAME For Postion 9: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 10: 13
05-03 01:32:51.558: D/Elementos:NAME For Postion 10: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 11: 14
05-03 01:32:51.558: D/Elementos:NAME For Postion 11: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 12: 15
05-03 01:32:51.558: D/Elementos:NAME For Postion 12: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 13: 16
05-03 01:32:51.558: D/Elementos:NAME For Postion 13: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 14: 17
05-03 01:32:51.558: D/Elementos:NAME For Postion 14: akira
05-03 01:32:51.558: D/Elementos:ID For Postion 15: 18
05-03 01:32:51.558: D/Elementos:NAME For Postion 15: akira

希望这能帮到你谢谢

票数 1
EN

Stack Overflow用户

发布于 2015-02-04 22:03:28

如果其他人遇到这种情况，我的问题是我需要替换：

代码语言：javascript
复制
private final Logger LOGGER = Logger.getLogger(this.getClass().getName());

使用

代码语言：javascript
复制
private transient Logger LOGGER = Logger.getLogger(this.getClass().getName());

注意关键字“瞬态”。这一点在https://stackoverflow.com/a/5889590/2308858上有进一步的解释。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/23438174

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