java使用httpclient发送HTTPS请求

读前须知

我会把需要依赖的包和引入的包先贴给大家，防止大家引用错误。

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.11</version>
            <scope>test</scope>
        </dependency>    

HTTPS 发送 POST 请求

public class SSLClient extends DefaultHttpClient {

    public SSLClient() throws Exception {
        super();
        //传输协议需要根据自己的判断
        SSLContext ctx = SSLContext.getInstance("TLS");
        X509TrustManager tm = new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException {
            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException {
            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
        ctx.init(null, new TrustManager[]{tm}, null);
        SSLSocketFactory ssf = new SSLSocketFactory(ctx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        ClientConnectionManager ccm = this.getConnectionManager();
        SchemeRegistry sr = ccm.getSchemeRegistry();
        sr.register(new Scheme("https", 443, ssf));
    }
}

这里发送 https 的操作有两个，一个是传 json ，一个是传 map ，大家根据自己需要自行复制使用

第一种是传 json 作为参数

参数说明：

url：url

map：json参数

charset：写死 utf-8

public String doPost(String url, String map, String charset) {
        org.apache.http.client.HttpClient httpClient = null;
        HttpPost httpPost = null;
        String result = null;
        try {
            httpClient = new SSLClient();
            httpPost = new HttpPost(url);
            //设置参数
            httpPost.addHeader("Accept", "application/json");
httpPost.addHeader("Content-Type", "application/json;charset=UTF-8");
            StringEntity stringEntity = new StringEntity(map);
            stringEntity.setContentEncoding("UTF-8");
            stringEntity.setContentType("application/json");
            httpPost.setEntity(stringEntity);
            HttpResponse response = httpClient.execute(httpPost);
            if (response != null) {
                HttpEntity resEntity = response.getEntity();
                if (resEntity != null) {
                  result = EntityUtils.toString(resEntity, charset);
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return result;
    }

第二种传map作为参数

public String doPost(String url, Map<String,String> map, String charset) {
        org.apache.http.client.HttpClient httpClient = null;
        HttpPost httpPost = null;
        String result = null;
        try {
            httpClient = new SSLClient();
            httpPost = new HttpPost(url);
            //设置参数
            List<NameValuePair> list = new ArrayList<NameValuePair>();
            Iterator iterator = map.entrySet().iterator();
            while (iterator.hasNext()) {
                Map.Entry<String, String> elem = (Map.Entry<String, String>) iterator.next();
       list.add(new BasicNameValuePair(elem.getKey(), elem.getValue()));
            }
            if (list.size() > 0) {
      UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);
                entity.setContentType("application/json");
                httpPost.setHeader("Accept", "application/json");
  httpPost.setHeader("Content-type", "application/json;charset=utf-8");
                httpPost.setEntity(entity);
            }
            HttpResponse response = httpClient.execute(httpPost);
            if (response != null) {
                HttpEntity resEntity = response.getEntity();
                if (resEntity != null) {
                    result = EntityUtils.toString(resEntity, charset);
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return result;
    }