什么是kgsearch.properties?无法使用Java应用Google知识图API

Question

这是我在Eclipse上执行的代码从这里复制：https://developers.google.com/knowledge-graph/

在安装了所有库后，可以成功编译该程序，但是该程序终止java.io.filenotfoundexception：kgsearch.properties（没有这样的文件或目录）错误。我如何在日食上获得以下示例代码工作？

import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.jayway.jsonpath.JsonPath;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import java.io.FileInputStream;
import java.util.Properties;
public class mainS {
  public static Properties properties = new Properties();
  public static void main(String[] args) {
    try {
      properties.load(new FileInputStream("kgsearch.properties"));
      HttpTransport httpTransport = new NetHttpTransport();
      HttpRequestFactory requestFactory = httpTransport.createRequestFactory();
      JSONParser parser = new JSONParser();
      GenericUrl url = new GenericUrl("https://kgsearch.googleapis.com/v1/entities:search");
      url.put("query", "Taylor Swift");
      url.put("limit", "10");
      url.put("indent", "true");
      url.put("key", properties.get("API_KEY"));
      HttpRequest request = requestFactory.buildGetRequest(url);
      HttpResponse httpResponse = request.execute();
      JSONObject response = (JSONObject) parser.parse(httpResponse.parseAsString());
      JSONArray elements = (JSONArray) response.get("itemListElement");
      for (Object element : elements) {
        System.out.println(JsonPath.read(element, "$.result.name").toString());
      }
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}

Answer 1

是的，因为kgsearch.properties可能不存在。创建文件并在此处输入您的API_KEY。该文件应该看起来像

API_KEY = <your_key_here>

创建并保存文件后，请使用以下代码段

File file = new File("C:/your/path/here/", "kgsearch.properties");
properties.load(new FileInputStream(file));

它应该使用后词

在此处阅读有关类似问题的信息，此处示例