请求第三方https接口

1. 生成证书
   根据第三方提供的.cer证书，我们可以用JDK的keytool工具生成证书

   a. keytool -import -v -file E:\cer\esb.*****-p.com.cn.cer -keystore F:tomcat.keystor
   

   b. 输入密码（自己给的密码）
   

   c.回车提示是否信任此证书（y信任）
   

2. 代码请求https接口

   public static String httpsPost(String url, String json) throws Exception {
   DefaultHttpClient client = new DefaultHttpClient();
   CloseableHttpClient httpClient = HttpClients.createDefault();
   client.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.BROWSER_COMPATIBILITY);
   client.getParams().setParameter(CoreProtocolPNames.USER_AGENT,
   " Mozilla/5.0 (Windows NT 6.2; rv:18.0) Gecko/20100101 Firefox/18.0");
   // 获得密匙库
   KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());

            // tomcat.keystore的位置在resources文件夹下
    ClassPathResource resource = new ClassPathResource("tomcat.keystore");
    InputStream inputStream = resource.getInputStream();
   
    // 密匙库的密码
    trustStore.load(inputStream, "123456".toCharArray());
   
    // 注册密匙库
    SSLSocketFactory socketFactory = new SSLSocketFactory(trustStore);
   
    // 不校验域名
    socketFactory.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
    Scheme sch = new Scheme("https", 443, socketFactory);
    client.getConnectionManager().getSchemeRegistry().register(sch);
    HttpPost httppost1 = new HttpPost(url);
    StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
    httppost1.setEntity(entity);
    HttpResponse response1 = client.execute(httppost1);
    HttpEntity resEntity1 = response1.getEntity();
    String jsonString = EntityUtils.toString(resEntity1, "utf-8");
    return jsonString;

   }