HttpClient设置忽略SSL，实现HTTPS访问, 解决Certificates does not conform to algorithm constraints

话不多说，直接上代码。

测试API:   https://api.k780.com/?app=life.time&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json

代码：

 import org.apache.http.HttpStatus;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.conn.ssl.NoopHostnameVerifier;
 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
 import org.apache.http.conn.ssl.TrustStrategy;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 import org.apache.http.ssl.SSLContextBuilder;
 import org.apache.http.util.EntityUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 
 public class TestHttps {
 
     private static Logger logger = LoggerFactory.getLogger(TestHttps.class);
 
     public static void main(String[] args) {
         CloseableHttpResponse response = null;
         CloseableHttpClient httpClient = null;
         try {
             String url = "https://api.k780.com/?app=life.time&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json";
             httpClient = createIgnoreSSLHttpClient();
             if (httpClient == null) {
                 logger.error("HttpClient create fail.");
                 return;
             }
             HttpGet httpGet = new HttpGet(url);
             response = httpClient.execute(httpGet);
             int statusCode = response.getStatusLine().getStatusCode();
             if (statusCode != HttpStatus.SC_OK) {
                 System.out.println("NO_OK : " + null);
             } else {
                 String result = EntityUtils.toString(response.getEntity(), "UTF-8");
                 System.out.println("OK : " + result);
             }
         } catch (Exception e) {
             e.printStackTrace();
         } finally {
             if (response != null) {
                 try {
                     response.close();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
             if (httpClient != null) {
                 try {
                     httpClient.close();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
     }
 
     public static CloseableHttpClient createIgnoreSSLHttpClient() {
         try {
             SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
                 public boolean isTrusted(X509Certificate[] chain,
                                          String authType) throws CertificateException {
                     return true;
                 }
             }).build();
             SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);
             return HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory).build();
         } catch (Exception e) {
             e.printStackTrace();
         }
         return null;
     }
 }

执行结果为：

OK : {"success":"1","result":{"timestamp":"1572330118","datetime_1":"2019-10-29 14:21:58","datetime_2":"2019年10月29日 14时21分58秒","week_1":"2","week_2":"星期二","week_3":"周二","week_4":"Tuesday"} 

测试使用jdk1.8

可能遇到的问题（报错）：

1.  javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure

2.  javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificates does not conform to algorithm constraints

解决办法：

找到jdk所在目录，例如我的目录为： D:\Java\jdk1.8.0_131

找到java.security文件.  目录： D:\Java\jdk1.8.0_131\jre\lib\security\java.security

编辑该文件，将  下面几行用# 注释，后关闭IDE，后重新打开，build后再次执行即可解决。

jdk.certpath.disabledAlgorithms=MD2, MD5, RSA keySize < 1024, \
   DSA keySize < 1024, EC keySize < 224
 
jdk.tls.disabledAlgorithms=SSLv3, RC4, MD5withRSA, DH keySize < 768, \
    EC keySize < 224