Question

我有一个网址，当我们在浏览器中运行该网址时发送短信。我在java中试过这个。以下是我的代码：

URL myURL = new URL("http://example.com/");
URLConnection myURLConnection = myURL.openConnection();
myURLConnection.connect();

我想在不打开浏览器的情况下运行网址。但问题是我没有收到任何短信（即代码不起作用）。我特意尝试在浏览器中运行url并且我收到了短信，所以url没问题。以上代码基于互联网的一些参考。任何帮助都是适当的。纠正我是我完全错误的解决方案。

Answer 1

您的代码存在的问题是，您永远不会调用getInputStream()，getContent()或getHeaderField()，这将实际启动场景后的请求。

试试这个：

URL myURL = new URL("http://example.com/");
URLConnection myURLConnection = myURL.openConnection();
try (InputStream is = myURLConnection.getInputStream()) {}

或者简单地说：

URL myURL = new URL("http://example.com/");
URLConnection myURLConnection = myURL.openConnection();
myURLConnection.getContentLength(); // -> calls getHeaderField("content-length")

NB：上面列出的3种方法会自动调用connect()，因此无需再明确调用它。

Answer 2

public String SendSMS() {
        StringBuilder sURL = new StringBuilder(100);
        StringBuilder sb = new StringBuilder();
        try {
            sURL.append("http://example.com/");
            InputStream is = new URL(sURL.toString()).openStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
            int cp;
            while ((cp = rd.read()) != -1) {
                sb.append((char) cp);
            }
        } catch (MalformedURLException me) {
            System.out.println("## MalformedURLException occured" + me.getMessage());
        } catch (UnsupportedEncodingException me) {
            System.out.println("## UnsupportedEncodingException occured : " + me.getMessage());
        } catch (IOException me) {
            System.out.println("## IOException occured in : " + me.getMessage());
        } catch (Exception me) {
            System.out.println("## Exception occured : " + me.getMessage());
        }
        return sb1.toString();
    }

Answer 3

您可能想要使用Apache HttpClient实用程序。

添加以下maven依赖项：

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

接下来，使用以下代码使用HTTP Get方法点击URL。

//create the url
String url = "http://www.google.com/search?q=httpClient";

//create the http client object 
HttpClient client = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(url);
//execute the request and capture the response
HttpResponse response = client.execute(request);

//get response code
System.out.println("Response Code : "
                + response.getStatusLine().getStatusCode());
//get the response body
BufferedReader rd = new BufferedReader(
    new InputStreamReader(response.getEntity().getContent()));

//capture the response in string
StringBuffer result = new StringBuffer();
String line = "";
while ((line = rd.readLine()) != null) {
    result.append(line);
}

如果网址已关闭，HttpClient会自动重试点击网址。此外，它还提供了重试事件处理程序。

更多参考：Force retry on specific http status code

在浏览器中运行URL而无需使用java打开浏览器

3 个答案: