httpClient4.3发送https请求

首先创建一个工具类：

public class HttpClientUtil {
public static CloseableHttpClient createSSLClientDefault() {
try {
SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(
null, new TrustStrategy() {
// 信任所有
public boolean isTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
return true;
}
}).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslContext);
return HttpClients.custom().setSSLSocketFactory(sslsf).build();
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyStoreException e) {
e.printStackTrace();
}
return HttpClients.createDefault();
}

}

在自己的程序中调用：

public static void main(String[] args) throws Exception {
CloseableHttpClient client = HttpClientUtil.createSSLClientDefault();
HttpGet get = new HttpGet("https://kyfw.12306.cn/otn/leftTicket/query?leftTicketDTO.train_date=2014-06-18&leftTicketDTO.from_station=WHN&leftTicketDTO.to_station=IZQ&purpose_codes=ADULT");
CloseableHttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
InputStream input = entity.getContent();
OutputStream output = new FileOutputStream("D:/dat.txt");
int len = 0;
byte[] buff = new byte[1024];
while(-1!=(len = input.read(buff))){
output.write(buff, 0,len);
}
}