我正在尝试从雅虎财经创建程序下载历史数据，然后根据输入主类的股票代码显示去年的历史数据。
出于某种原因，我在尝试运行程序时不断收到401代码。如果我复制并粘贴到浏览器中，401错误中显示的URL会让我想去。
不确定我在这里做错了什么。
这是我的StockDownloader类的代码：
import java.util.GregorianCalendar;
import java.util.Calendar;
import java.util.ArrayList;
import java.net.URL;
import java.net.URLConnection;
import java.util.Scanner;
public class StockDownloader
{
public static final int DATE = 0;
public static final int OPEN = 1;
public static final int HIGH = 2;
public static final int LOW = 3;
public static final int CLOSE = 4;
public static final int VOLUME = 6;
public static final int ADJCLOSE = 5;
private ArrayList<GregorianCalendar> dates;
private ArrayList<Double> opens;
private ArrayList<Double> highs;
private ArrayList<Double> lows;
private ArrayList<Double> closes;
private ArrayList<Integer> volumes;
private ArrayList<Double> adjCloses;
public StockDownloader (String symbol)
{
dates = new ArrayList<GregorianCalendar>();
opens = new ArrayList<Double>();
highs = new ArrayList<Double>();
lows = new ArrayList<Double>();
closes = new ArrayList<Double>();
volumes = new ArrayList<Integer>();
adjCloses = new ArrayList<Double>();
//https://query1.finance.yahoo.com/v7/finance/download/IBM?period1=1467352800&period2=1498888800&interval=1d&events=history&crumb=2WsiR.p1KtI
String url = "https://query1.finance.yahoo.com/v7/finance/download/"+symbol+"?period1=1467352800&period2=1498888800&interval=1d&events=history&crumb=2WsiR.p1KtI";
try
{
URL yhoofin = new URL(url);
URLConnection data = yhoofin.openConnection();
Scanner input = new Scanner(data.getInputStream());
if(input.hasNext())//skip line...it's just the header
input.nextLine();
//start reading data
while(input.hasNextLine())
{
String line = input.nextLine();
//TODO- connec tdata to the correct ArrayList
System.out.println(line);
}
}
catch (Exception e)
{
System.err.println(e);
}
}
public ArrayList<GregorianCalendar> getDates()
{
return dates;
}
/*public ArrayList<Double> get Opens()
{
}*/
}
我的主类代码：
public class Stocks {
public static void main(String[] args)
{
StockDownloader test = new StockDownloader("DCTH");
}
}
请帮助
答案 0 :(得分：1)
看起来雅虎已经改变了访问金融API的方式。您需要向URL连接添加cookie。已经改变了你的代码，它对我有用。
public class StockDownloader {
public static final int DATE = 0;
public static final int OPEN = 1;
public static final int HIGH = 2;
public static final int LOW = 3;
public static final int CLOSE = 4;
public static final int VOLUME = 6;
public static final int ADJCLOSE = 5;
private ArrayList<GregorianCalendar> dates;
private ArrayList<Double> opens;
private ArrayList<Double> highs;
private ArrayList<Double> lows;
private ArrayList<Double> closes;
private ArrayList<Integer> volumes;
private ArrayList<Double> adjCloses;
private String finalCrumb;
public StockDownloader(String symbol) {
dates = new ArrayList<GregorianCalendar>();
opens = new ArrayList<Double>();
highs = new ArrayList<Double>();
lows = new ArrayList<Double>();
closes = new ArrayList<Double>();
volumes = new ArrayList<Integer>();
adjCloses = new ArrayList<Double>();
try {
// Hit the below URL to get the cookies and the crumb value to access the finance API
String mainURL = "https://uk.finance.yahoo.com/quote/"+symbol+"/history";
Map<String, List<String>> setCookies = setCookies(mainURL);
// https://query1.finance.yahoo.com/v7/finance/download/IBM?period1=1467352800&period2=1498888800&interval=1d&events=history&crumb=2WsiR.p1KtI
// will need to append the crumb in the end to the below URL to have the actual crumb rather than the hardcoded one
String url = "https://query1.finance.yahoo.com/v7/finance/download/" + symbol
+ "?period1=1467352800&period2=1498888800&interval=1d&events=history&crumb=" + finalCrumb;
URL yhoofin = new URL(url);
URLConnection data = yhoofin.openConnection();
// get the list of Set-Cookie cookies from response headers
List<String> cookies = setCookies.get("Set-Cookie");
if (cookies != null) {
for (String c : cookies)
data.setRequestProperty("Cookie", c);
}
Scanner input = new Scanner(data.getInputStream());
if (input.hasNext())// skip line...it's just the header
input.nextLine();
// start reading data
while (input.hasNextLine()) {
String line = input.nextLine();
// TODO- connec tdata to the correct ArrayList
System.out.println(line);
}
input.close();
}
catch (Exception e) {
System.err.println(e);
}
}
// This method extracts the crumb and is being called from setCookies() method
private String searchCrumb(URLConnection con) throws IOException {
String crumb = null;
InputStream inStream = con.getInputStream();
InputStreamReader irdr = new InputStreamReader(inStream);
BufferedReader rsv = new BufferedReader(irdr);
Pattern crumbPattern = Pattern.compile(".*\"CrumbStore\":\\{\"crumb\":\"([^\"]+)\"\\}.*");
String line = null;
while (crumb == null && (line = rsv.readLine()) != null) {
Matcher matcher = crumbPattern.matcher(line);
if (matcher.matches())
crumb = matcher.group(1);
}
rsv.close();
System.out.println("Crumb is : "+crumb);
return crumb;
}
// This method extracts the cookies from response headers and passes the same con object to searchCrumb()
// method to extract the crumb and set the crumb value in finalCrumb global variable
private Map<String, List<String>> setCookies(String mainUrl) throws IOException {
// "https://finance.yahoo.com/quote/SPY";
Map<String, List<String>> map = new HashMap<String, List<String>>();
URL url = new URL(mainUrl);
URLConnection con = url.openConnection();
finalCrumb = searchCrumb(con);
for (Map.Entry<String, List<String>> entry : con.getHeaderFields().entrySet()) {
if (entry.getKey() == null || !entry.getKey().equals("Set-Cookie"))
continue;
for (String s : entry.getValue()) {
map.put(entry.getKey(), entry.getValue());
System.out.println(map);
}
}
return map;
}
public ArrayList<GregorianCalendar> getDates() {
return dates;
}
}
有关于财务API here的详细信息。
试一试！
答案 1 :(得分：0)