java - 使用 Yahoo Finance API 检索股票行情

Question

我正在尝试为最终项目构建一个简单的幻想股票 JAVA 应用程序。目前的主要问题是弄清楚如何检索股票数据。

我从雅虎财经 Java 教程中获取了这段代码，但它似乎已经过时了。有人愿意帮助我并更新 httpclient 4.x 或将我链接到一个有效的示例吗？

另外，在命令行中，我是否只需在 -cp 中引用 httpclient，或者也引用 httpcore？

import java.io.*;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;

public class YahooWebServiceGet {   

    public static void main(String[] args) throws Exception {
        String request = "http://api.search.yahoo.com/WebSearchService/V1/webSearch?appid=YahooDemo&query=umbrella&results=10";

        HttpClient client = new HttpClient();
        GetMethod method = new GetMethod(request);

        // Send GET request
        int statusCode = client.executeMethod(method);

        if (statusCode != HttpStatus.SC_OK) {
            System.err.println("Method failed: " + method.getStatusLine());
        }
        InputStream rstream = null;

        // Get the response body
        rstream = method.getResponseBodyAsStream();

        // Process the response from Yahoo! Web Services
        BufferedReader br = new BufferedReader(new InputStreamReader(rstream));
        String line;
        while ((line = br.readLine()) != null) {
            System.out.println(line);
        }
        br.close();
    }

}

Answer 1

尝试这样的事情:

CloseableHttpClient httpclient = HttpClients.createDefault();
String url = "http://api.search.yahoo.com/WebSearchService/V1/webSearch?appid=YahooDemo&query=umbrella&results=10";
HttpGet httpget = new HttpGet(url);
CloseableHttpResponse response = httpclient.execute(httpget);
try {
    HttpEntity entity = response.getEntity();
    InputStream is = entity.getContent();

    //do stuff with is
} finally {
    response.close();
}

我不熟悉 Yahoo Finance API，但如果响应是 JSON 并且您喜欢使用 Jackson，则可以使用 InputStream 执行此操作:

ObjectMapper mapper = new ObjectMapper();
Map<String, Object> jsonMap = mapper.readValue(inputStream, Map.class);