Question

我需要从此API http://countryapi.gear.host/v1/Country/getCountries?pName=Australia获取特定数据，将其转换为String并在控制台上写出。我想只为澳大利亚获取数据。如何只为Name和Alpha2Code获取String格式的数据，如下所示： Australia, AU？我试图使用EntityUtils.toString(response)，但它不起作用。

这是我的代码：

public class Client {

public static void main(String[] args) throws ClientProtocolException, IOException {

    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet("http://countryapi.gear.host/v1/Country/getCountries?pName=Australia");
    request.addHeader("accept", "application/json");
    HttpResponse response = client.execute(request);
    HttpEntity entity = response.getEntity();
    InputStream stream = entity.getContent();
    BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
    String line = reader.readLine();
    System.out.println(line);
}
}

代码实际上为澳大利亚返回JSON，如下所示：

enter image description here

Answer 1

您可以使用java api进行json解析。我只是在写一个示例代码。你可以在下面的URL上探索json解析api： http://www.oracle.com/technetwork/articles/java/json-1973242.html

JsonObject obj = rdr.readObject();
JsonArray results = obj.getJsonArray("data");
for (JsonObject result : results.getValuesAs(JsonObject.class)) {
    System.out.print(result.getJsonObject("name").getString("name"));
    System.out.print(": ");
    System.out.println(result.getString("message", ""));
    System.out.println("-----------");
 }

Answer 2

尝试这样的事情：

Gson gson = new Gson();
JsonObject result = gson.fromJson(line, JsonObject.class);
JsonArray response = result.getAsJsonArray("Response");
Country country = gson.fromJson(response, Country.class);

使用REST API从Web服务接收数据

2 个答案: