Java HttpClient 4.x的用法(Get篇)

HttpClient是一个经典的Java的HTTP客户端,当升级到4.x后,其API发生了很大变化,下面以带参数的HTTP Get为例,说说如何使用。

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// Timeout Stradegy
RequestConfig DEFAULT_REQUEST_CONFIG = RequestConfig.custom()
.setSocketTimeout(1000).setConnectTimeout(1000).build();
// Create client
CloseableHttpClient httpclient = HttpClients
.custom()
.setDefaultRequestConfig(DEFAULT_REQUEST_CONFIG)
.setKeepAliveStrategy(
DefaultConnectionKeepAliveStrategy.INSTANCE).build();
HttpGet get = new HttpGet("http://www.baidu.com");
URIBuilder uriBuilder = new URIBuilder(get.getURI()).setParameter("wd",
"度娘");
get.setURI(uriBuilder.build());
// Execute & Get response
CloseableHttpResponse resp = httpclient.execute(get);
System.out.println(resp.getStatusLine().getStatusCode());
System.out.println(IOUtils.toString(resp.getEntity().getContent()));
// Timeout Stradegy RequestConfig DEFAULT_REQUEST_CONFIG = RequestConfig.custom() .setSocketTimeout(1000).setConnectTimeout(1000).build(); // Create client CloseableHttpClient httpclient = HttpClients .custom() .setDefaultRequestConfig(DEFAULT_REQUEST_CONFIG) .setKeepAliveStrategy( DefaultConnectionKeepAliveStrategy.INSTANCE).build(); HttpGet get = new HttpGet("http://www.baidu.com"); URIBuilder uriBuilder = new URIBuilder(get.getURI()).setParameter("wd", "度娘"); get.setURI(uriBuilder.build()); // Execute & Get response CloseableHttpResponse resp = httpclient.execute(get); System.out.println(resp.getStatusLine().getStatusCode()); System.out.println(IOUtils.toString(resp.getEntity().getContent()));
		// Timeout Stradegy
		RequestConfig DEFAULT_REQUEST_CONFIG = RequestConfig.custom()
				.setSocketTimeout(1000).setConnectTimeout(1000).build();

		// Create client
		CloseableHttpClient httpclient = HttpClients
				.custom()
				.setDefaultRequestConfig(DEFAULT_REQUEST_CONFIG)
				.setKeepAliveStrategy(
						DefaultConnectionKeepAliveStrategy.INSTANCE).build();

		HttpGet get = new HttpGet("http://www.baidu.com");
		URIBuilder uriBuilder = new URIBuilder(get.getURI()).setParameter("wd",
				"度娘");
		get.setURI(uriBuilder.build());

		// Execute & Get response
		CloseableHttpResponse resp = httpclient.execute(get);
		System.out.println(resp.getStatusLine().getStatusCode());
		System.out.println(IOUtils.toString(resp.getEntity().getContent()));

 

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