java - 如何在 Blackberry 中通过 www.ipaddresslocation.org 获取 IP 地址

Question

我是 Blackberry 编程的新手。 我正在尝试通过 www.ipaddressslocation.org 获取 IP 地址、县、市、州/省

我的来源:

String url = "http://www.ipaddresslocation.org/my-ip-address.php";
    // HTTP connection
    HttpConnection httpConnection = null;
    // Stream connection
    StreamConnection streamConnection = (StreamConnection) Connector
            .open(url);
    httpConnection = (HttpConnection) streamConnection;
    int code = httpConnection.getResponseCode();
    String strContent = "";
    // Check response code
    if (code == HttpConnection.HTTP_OK) {
        InputStream is = httpConnection.openInputStream();
        int length = (int) httpConnection.getLength();
        // Content is empty
        if (length != -1) {
            byte incomingData[] = new byte[length];
            is.read(incomingData);
            strContent = new String(incomingData);
            // Write content
        } else {
            ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
            int ch;
            while ((ch = is.read()) != -1) {
                bytestream.write(ch);
            }
            strContent = new String(bytestream.toByteArray());
            bytestream.close();
        }
    }

完成此方法后，我得到了 strContent 返回值。 详细内容:

\ndocument.write('<table><tr><td>Hello, visitor from: <strong> Takatsuki, Japan</strong>');document.write('<img src=\'http://www.ipaddresslocation.org/flags/jp.png\'></td></tr>');document.write('<tr><td>Your Country Code: <b>JP</b></td></tr>');document.write('<tr><td>Your IP State: <b>Osaka</b></td></tr>');document.write('<tr><td>Your IP Address: <b>202.213.220.66</b></td></tr>');document.write('<tr><td>Your Hostname: <b>ns.isb.co.jp</b></td></tr>');document.write('<tr><td>Your ISP: <b>So-net Entertainment Corporation</b></td></tr>');document.write('<tr><td>Your Organization: <b>ISB CORP.</b></td></tr></table>');

如何从上面的内容中获取IP、国家、州、城市？

谢谢和最好的问候!

Answer 1

由于没有标准格式，即 JSON 或 XML，您必须自己解析响应。要编写您的抓取工具，只需仔细检查响应格式并设计您的算法。

例如，如果我们用“;”分割响应，响应如下所示。

document.write('<table><tr><td>Hello, visitor from: <strong> Dhaka, Bangladesh</strong>')
document.write('<img src=\'http://www.ipaddresslocation.org/flags/bd.png\'></td></tr>')
document.write('<tr><td>Your Country Code: <b>BD</b></td></tr>')
document.write('<tr><td>Your IP State: <b>Dhaka</b></td></tr>')
document.write('<tr><td>Your IP Address: <b>116.212.105.42</b></td></tr>')
document.write('<tr><td>Your Hostname: <b>ws9-tetrasoft-dm-ac1-p16.telnet.com.bd</b></td></tr>')
document.write('<tr><td>Your ISP: <b>Telnet Communication Limited</b></td></tr>')
document.write('<tr><td>Your Organization: <b>Telnet Communication Limited</b></td></tr></table>')

然后你可以从每一行中删除“document.write('”和“')”..

那么响应会变成

<table><tr><td>Hello, visitor from: <strong> Dhaka, Bangladesh</strong>
<img src=\'http://www.ipaddresslocation.org/flags/bd.png\'></td></tr>
<tr><td>Your Country Code: <b>BD</b></td></tr>
<tr><td>Your IP State: <b>Dhaka</b></td></tr>
<tr><td>Your IP Address: <b>116.212.105.42</b></td></tr>
<tr><td>Your Hostname: <b>ws9-tetrasoft-dm-ac1-p16.telnet.com.bd</b></td></tr>
<tr><td>Your ISP: <b>Telnet Communication Limited</b></td></tr>
<tr><td>Your Organization: <b>Telnet Communication Limited</b></td></tr></table>

现在您可以使用任何 HTML 解析器或自己解析剩余部分...

只是解决问题...

例如要获取IP地址，需要解析第5行..

删除索引0到<b>的所有字符+ 3....这将从该行中删除部分“<tr><td>Your IP Address: <b>”...... 然后从 </b> 的索引中删除字符到最后...这将从该行中删除“”...您将得到“116.212.105.42”作为剩余...