Java中HTTPRequest获取数据

发布于 2024-11-06 15:15:47 字数 395 浏览 0 评论 0原文

我想用Java做一个HTTPRequest，然后从服务器获取数据（这不是网页，数据来自数据库）。
我尝试了这个，但 getData 不起作用。
你知道我如何获取数据吗？

  public static void main(String args[]) throws Exception {
    URL url = new URL("http://ip-ad.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
    System.out.println("Request method is " + httpCon.getData());
 }

谢谢

原文

I would like to do an HTTPRequest in Java and then get the data from the server (it's not a webpage the data come from a database).
I try this but the getData doesn't work.
Do you know how I can get the Data?

  public static void main(String args[]) throws Exception {
    URL url = new URL("http://ip-ad.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
    System.out.println("Request method is " + httpCon.getData());
 }

Thanks

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不语却知心 2024-11-13 15:15:47

您可以将 Web 请求的响应正文作为获取InputStream with：

httpCon.getInputStream();

从这里开始，这取决于响应数据的格式。如果它是 XML，则将其传递给库来解析 XML。如果您想将其读入String，请参阅：将网站内容读入字符串。这是将其写入本地文件的示例：

InputStream in = httpCon.getInputStream();
OutputStream out = new FileOutputStream("file.dat");
out = new BufferedOutputStream(out);
byte[] buf = new byte[8192];
int len = 0;
while ((len = in.read(buf)) != -1) {
    out.write(buf, 0, len);
}
out.close();

You can get the response body of the web request as an InputStream with:

httpCon.getInputStream();

From there it depends on what the format of the response data is. If it's XML then pass it to a library to parse XML. If you want to read it into a String see: Reading website's contents into string. Here's an example of writing it to a local file:

InputStream in = httpCon.getInputStream();
OutputStream out = new FileOutputStream("file.dat");
out = new BufferedOutputStream(out);
byte[] buf = new byte[8192];
int len = 0;
while ((len = in.read(buf)) != -1) {
    out.write(buf, 0, len);
}
out.close();

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