与GSon嵌套的Json解析

Question

如何使用谷歌Gson解析Json响应。

{ 
    "rootobject":[ 
     { 
     "id":"7", 
     "name":"PP-1", 
     "subtitle":"name-I", 
     "key1":"punjab", 
     "key12":"2013", 
     "location":"", 
     "key13":"0", 
     "key14":"0", 
     "key15":"0", 
     "result_status":null 
     }, 
     { 
     "id":"7", 
     "name":"PP-1", 
     "subtitle":"name-I", 
     "key1":"punjab", 
     "key12":"2013", 
     "location":"", 
     "key13":"0", 
     "key14":"0", 
     "key15":"0", 
     "result_status":null 
     }, 
     { 
     "id":"7", 
     "name":"PP-1", 
     "subtitle":"name-I", 
     "key1":"punjab", 
     "key12":"2013", 
     "location":"", 
     "key13":"0", 
     "key14":"0", 
     "key15":"0", 
     "result_status":null 
     }, 
     { 
     "id":"7", 
     "name":"PP-1", 
     "subtitle":"name-I", 
     "key1":"punjab", 
     "key12":"2013", 
     "location":"", 
     "key13":"0", 
     "key14":"0", 
     "key15":"0", 
     "result_status":null 
     } 
    ] 
} 

Answer 1

我想创建对象“包装”的反应，如：

public class Response { 

    @SerializedName("root_object") 
    private List<YourObject> rootObject; 

    //getter and setter 
} 


public class YourObject { 

    @SerializedName("id") 
    private String id; 
    @SerializedName("name") 
    private String name; 
    @SerializedName("subtitle") 
    private String subtitle; 
    //... other fields 

    //getters and setters 
} 

注：使用@SerializedName注释遵循命名约定在Java属性，而在JSON匹配的名字数据。

然后你只解析JSON与Reponse对象，像这样：

String jsonString = "your json data..."; 
Gson gson = new Gson(); 
Response response = gson.fromJson(jsonString, Response.class); 

现在你可以使用getter和setter访问您Response对象中的所有数据。

注意：您的Response对象可能用于解析不同的JSON响应。例如，您可以使用不包含id或subtitle字段的JSON响应，但您的Reponse对象也会解析响应，并且只需在此字段中输入null。这样，你只能使用一个Response类来解析所有可能的响应...

编辑：我没有意识到Android标记，我在通常的Java程序中使用这种方法，我不确定它是否有效期为Android ...

Answer 2

你可以试试这个，希望这将工作

// Getting Array 
JSONArray contacts = json.getJSONArray("rootobject"); 
SampleClass[] sample=new SampleClass[contacts.length](); 

    // looping through All 
    for(int i = 0; i < contacts.length(); i++){ 
     JSONObject c = contacts.getJSONObject(i); 

     // Storing each json item in variable 
     sample[i].id = c.getString("id"); 
     sample[i].name = c.getString("name"); 
     sample[i].email = c.getString("subtitle"); 
     sample[i].address = c.getString("key1"); 
     sample[i].gender = c.getString("key12"); 
     sample[i].gender = c.getString("location"); 
     sample[i].gender = c.getString("key13"); 
     sample[i].gender = c.getString("key14"); 
     sample[i].gender = c.getString("key15"); 
     sample[i].gender = c.getString("result_status"); 
     }