Java是一种广泛应用于企业级应用开发的编程语言。在Java中，https和httpclient是两个重要的概念。https是一种安全传输协议，可以对数据进行加密处理；而httpclient是一种用于发送http请求的工具，可以帮助Java开发者方便地进行网络通信。

/**
 * 使用httpclient发送http请求
 */
public static void sendRequest() throws Exception {
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpGet httpGet = new HttpGet("http://www.baidu.com");
CloseableHttpResponse response = httpClient.execute(httpGet);
try {
HttpEntity entity = response.getEntity();
String content = EntityUtils.toString(entity, "UTF-8");
System.out.println(content);
} catch (Exception ex) {
ex.printStackTrace();
} finally {
response.close();
}
}

在Java中发送https请求时，需要使用SSL来进行安全传输。以下是一个示例：

/**
 * 使用https发送请求
 */
public static void sendHttpsRequest() throws Exception {
SSLContext sslContext = SSLContexts.custom()
.loadTrustMaterial(null, new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
return true;
}
})
.build();
SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext,
new String[] {"TLSv1.2", "TLSv1.1"},
null,
NoopHostnameVerifier.INSTANCE);
CloseableHttpClient httpClient = HttpClients.custom()
.setSSLSocketFactory(sslConnectionSocketFactory)
.build();
HttpGet httpGet = new HttpGet("https://www.baidu.com");
CloseableHttpResponse response = httpClient.execute(httpGet);
try {
HttpEntity entity = response.getEntity();
String content = EntityUtils.toString(entity, "UTF-8");
System.out.println(content);
} catch (Exception ex) {
ex.printStackTrace();
} finally {
response.close();
}
}

以上就是关于Java中https和httpclient的一些基本介绍和示例代码。在实际应用中，我们可以根据具体需求灵活应用这些工具，让Java开发更加高效便捷。