Java 使用发送请求报错

问题

　　发送post请求报错

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

原因

　　SSL证书的问题

解决办法

　　绕过SSL证书认证即可。

1、HttpClient绕过方法

public HttpClient skipHttpsCertificate() {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }

                public void checkClientTrusted(X509Certificate[] arg0,
                                               String arg1) throws CertificateException {
                }

                public void checkServerTrusted(X509Certificate[] arg0,
                                               String arg1) throws CertificateException {
                }
            };
            ctx.init(null, new TrustManager[] { tm }, null);
            SSLConnectionSocketFactory ssf = new SSLConnectionSocketFactory(
                    ctx, NoopHostnameVerifier.INSTANCE);
            CloseableHttpClient httpclient = HttpClients.custom()
                    .setSSLSocketFactory(ssf).build();
            return httpclient;
        } catch (Exception e) {
            return HttpClients.createDefault();
        }
    }　

调用方法：

CloseableHttpClient client = (CloseableHttpClient) HikvisionUtil.skipHttpsCertificate();

// 调用生成Client之后其余操作和 HttpClient 请求处理一致

CloseableHttpResponse resp = client.execute(httpPost);

其余的请求方式可自行百度