blocks|key|1443975|text|从技术上讲，您可以使用直接的TCP套接字来完成此操作。不过，我不建议你这么做。我强烈建议您使用Apache+HttpClient。在其simplest+form中|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1443976|GetMethod+get+=+new+GetMethod("http://httpcomponents.apache.org");
//+execute+method+and+handle+any+error+responses.
...
InputStream+in+=+get.getResponseBodyAsStream();
//+Process+the+data+from+the+input+stream.
get.releaseConnection();|code-block|syntax|javascript|1443977|这是一个更多的complete+example。|1443978|entityMap|0|LINK|mutability|MUTABLE|url|http://hc.apache.org/httpclient-3.x/|1|http://hc.apache.org/httpclient-3.x/methods/get.html|2|http://svn.apache.org/viewvc/httpcomponents/oac.hc3x/trunk/src/examples/TrivialApp.java?view=markup^0|1B|H|0|1V|D|1|0|0|7|G|2|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]]|C|$]]|$1|K|3|-4|5|6|7|18|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]|U|$5|N|O|P|C|$Q|V]]]]

Technically you could do it with a straight TCP socket. I wouldn't recommend it however. I would highly recommend you use <a href="http://hc.apache.org/httpclient-3.x/" rel="noreferrer">Apache HttpClient</a> instead. In its <a href="http://hc.apache.org/httpclient-3.x/methods/get.html" rel="noreferrer">simplest form</a>:

<pre><code>GetMethod get = new GetMethod("http://httpcomponents.apache.org");
// execute method and handle any error responses.
...
InputStream in = get.getResponseBodyAsStream();
// Process the data from the input stream.
get.releaseConnection();
</code></pre>

and here is a more <a href="http://svn.apache.org/viewvc/httpcomponents/oac.hc3x/trunk/src/examples/TrivialApp.java?view=markup" rel="noreferrer">complete example</a>.

blocks|key|1229071|text|如果你想流式传输任何网页，你可以使用下面的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1229072|import+java.io.*;
import+java.net.*;

public+class+c+{

+++public+static+String+getHTML(String+urlToRead)+throws+Exception+{
++++++StringBuilder+result+=+new+StringBuilder();
++++++URL+url+=+new+URL(urlToRead);
++++++HttpURLConnection+conn+=+(HttpURLConnection)+url.openConnection();
++++++conn.setRequestMethod("GET");
++++++try+(BufferedReader+reader+=+new+BufferedReader(
++++++++++++++++++new+InputStreamReader(conn.getInputStream())))+{
++++++++++for+(String+line;+(line+=+reader.readLine())+!=+null;+)+{
++++++++++++++result.append(line);
++++++++++}
++++++}
++++++return+result.toString();
+++}

+++public+static+void+main(String[]+args)+throws+Exception
+++{
+++++System.out.println(getHTML(args[0]));
+++}
}|code-block|syntax|javascript|1229073|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you want to stream any webpage, you can use the method below.
<pre><code>import java.io.*;
import java.net.*;

public class c {

 public static String getHTML(String urlToRead) throws Exception {
 StringBuilder result = new StringBuilder();
 URL url = new URL(urlToRead);
 HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 conn.setRequestMethod(&quot;GET&quot;);
 try (BufferedReader reader = new BufferedReader(
 new InputStreamReader(conn.getInputStream()))) {
 for (String line; (line = reader.readLine()) != null; ) {
 result.append(line);
 }
 }
 return result.toString();
 }

 public static void main(String[] args) throws Exception
 {
 System.out.println(getHTML(args[0]));
 }
}
</code></pre>

blocks|key|1229135|text|最简单的方法是不需要第三方库，它可以创建一个URL对象，然后对其调用openConnection或openStream。请注意，这是一个非常基本的API，因此您不会对头部有太多的控制。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1229136|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/javase/6/docs/api/java/net/URL.html|1|http://java.sun.com/javase/6/docs/api/java/net/URL.html#openConnection()|2|http://java.sun.com/javase/6/docs/api/java/net/URL.html#openStream()^0|M|3|0|Y|E|1|1D|A|2|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]]]

The simplest way that doesn't require third party libraries it to create a <a href="http://java.sun.com/javase/6/docs/api/java/net/URL.html" rel="noreferrer">URL</a> object and then call either <a href="http://java.sun.com/javase/6/docs/api/java/net/URL.html#openConnection()" rel="noreferrer">openConnection</a> or <a href="http://java.sun.com/javase/6/docs/api/java/net/URL.html#openStream()" rel="noreferrer">openStream</a> on it. Note that this is a pretty basic API, so you won't have a lot of control over the headers.

blocks|key|1229210|text|如果不想使用外部库，可以使用标准Java+API中的URL和URLConnection类。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1229211|示例如下所示：|1229212|String+urlString+=+"http://wherever.com/someAction?param1=value1&param2=value2....";
URL+url+=+new+URL(urlString);
URLConnection+conn+=+url.openConnection();
InputStream+is+=+conn.getInputStream();
//+Do+what+you+want+with+that+stream|code-block|syntax|javascript|1229213|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you dont want to use external libraries, you can use URL and URLConnection classes from standard Java API.

An example looks like this:

<pre><code>String urlString = "http://wherever.com/someAction?param1=value1&amp;param2=value2....";
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
InputStream is = conn.getInputStream();
// Do what you want with that stream
</code></pre>

问如何在Java中执行HTTP GET？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Java中执行HTTP GET？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Java中执行HTTP GET？
EN