如何从URL获取数据? [英] How to get data from a URL?

问题描述

我在网站上提供了数据，如下图所示:

I have data provided in a website and it is presented as in the following image:

该网站提供了一些参数的值，这些参数会随时更新. 现在，我想根据Android应用程序中的列名和行号来检索这些数据，我知道如何打开http连接.但不幸的是，我不知道从哪里开始以及如何读取图像中提供的数据.

This website offers values of some parameters which are updated every while. Now I want to retrieve these data according to the column name and the row number in the Android app, I know how to open http connection. But unfortunately I have no idea from where should I start and how to read the data provided in the image.

推荐答案

除非您有特殊的数据源需要处理，否则您必须阅读网站的内容然后手动进行处理.这是 java教程中有关如何从URL连接读取的链接.

Unless you have a special data source to work on, you have to read the website's contents then process it manually. Here is a link from the java tutorials on how to read from an URL connection.

import java.net.*;
import java.io.*;

public class URLConnectionReader {
    public static void main(String[] args) throws Exception {
        URL oracle = new URL("http://www.oracle.com/");
        URLConnection yc = oracle.openConnection();
        BufferedReader in = new BufferedReader(new InputStreamReader(
                                yc.getInputStream()));
        String inputLine;
        while ((inputLine = in.readLine()) != null) 
            System.out.println(inputLine);
        in.close();
    }
}

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如果您位于代理之后，还应该将这些系统属性(设置为适当的值):

If you are behind a proxy you should also set these system properties (to the appropriate values):

System.setProperty("http.proxyHost", "3.182.12.1");
System.setProperty("http.proxyPort", "1111");

这篇关于如何从URL获取数据?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！