http、https请求代码示例

   代码清单，供参考：

MyX509TrustManager.java

package utils;

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.X509TrustManager;

public class MyX509TrustManager implements X509TrustManager {

    /*
     * (non-Javadoc)
     * 
     * @see
     * javax.net.ssl.X509TrustManager#checkClientTrusted(java.security.cert.
     * X509Certificate[], java.lang.String)
     */
    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        // TODO 完成X509TrustManager.checkClientTrusted方法的构建或覆盖
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * javax.net.ssl.X509TrustManager#checkServerTrusted(java.security.cert.
     * X509Certificate[], java.lang.String)
     */
    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        // TODO 完成X509TrustManager.checkServerTrusted方法的构建或覆盖
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.net.ssl.X509TrustManager#getAcceptedIssuers()
     */
    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return null;
        // TODO 完成X509TrustManager.getAcceptedIssuers方法的构建或覆盖
    }
}

TrustAnyHostnameVerifier.java

package utils;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSession;

public class TrustAnyHostnameVerifier implements HostnameVerifier {

    /*
     * (non-Javadoc)
     * 
     * @see javax.net.ssl.HostnameVerifier#verify(java.lang.String,
     * javax.net.ssl.SSLSession)
     */
    @Override
    public boolean verify(String hostname, SSLSession session) {
        return true;
    }
}

JerseyHttpUtils.java

package utils;

import java.net.InetAddress;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.ws.rs.core.MediaType;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mx.kernel.StringUtil;
import org.mx.kernel.config.ApplicationConfig;
import org.mx.platform.base.rest.service.FastJSONProvider;

import com.alibaba.fastjson.JSON;import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.ClientResponse.Status;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.client.urlconnection.HTTPSProperties;

/**
 * 基于jersey的客户端请求工具
 * 
 */
public class JerseyHttpUtils {

    /** 静态变量：系统日志 */
    private static final Log logger = LogFactory.getLog(HttpUtils2.class);

    /** 静态变量：是否启用共享秘钥认证 */
    private static boolean SHARE_KEY_AUTH_ENABLE = false;
    /** 静态变量：客户端系统编码 */
    private static String CLIENT_SYSTEM_CODE = "";

    static {
        ApplicationConfig applicationConfig = ApplicationConfig.getApplicationConfig();
        if (applicationConfig != null) {
            SHARE_KEY_AUTH_ENABLE = applicationConfig.getConfigBoolean("share.key.auth.enable");
            if (applicationConfig.getConfig("client.system.code") != null) {
                CLIENT_SYSTEM_CODE = applicationConfig.getConfig("client.system.code");
            }
        }
    }

    /**
     * webapi http get调用，反序列化结果
     * 
     * @param <T>
     * @param url
     * @param map
     *            参数可直接直接以?key=value的方式放在url中，也可放在map里
     * @param c
     * @return
     * @throws Exception
     */
    public static <T> T get(String url, HashMap<String, String> map, Class<T> c) throws Exception {
        try {
            Client client = getClientConfig(url);
            WebResource resource = client.resource(url);
            if (map != null && map.size() > 0) {
                for (Map.Entry<String, String> entry : map.entrySet()) {
                    resource = resource.queryParam(entry.getKey(), entry.getValue());
                }
            }
            ClientResponse response = null;
            if (SHARE_KEY_AUTH_ENABLE) {// 使用共享密钥认证
                // 请求UTC时间
                long lCurTime = System.currentTimeMillis();
                // 获取本地IP
                InetAddress ia = InetAddress.getLocalHost();
                String localip = ia.getHostAddress();
                String token = lCurTime + "," + localip + "," + CLIENT_SYSTEM_CODE;
                String encodeToken = AES256Encryption.encrypt(token);
                response = resource.header("tokenkey", encodeToken).get(ClientResponse.class);
            } else {// 不使用共享密钥认证
                response = resource.get(ClientResponse.class);
            }
            if (Status.OK.equals(response.getClientResponseStatus())) {
                String resultString = response.getEntity(String.class);
                if (!StringUtil.isBlank(resultString)) {
                    return JSON.parseObject(resultString, c);
                }
            }
            return null;
        } catch (Exception e) {
            if (logger.isErrorEnabled()) {
                logger.error(e);
            }
            throw e;
        }
    }

    /**
     * webapi http post调用，反序列化结果
     * 
     * @throws Exception
     */
    public static <T> T post(String url, Object postObject, Class<T> c) throws Exception {
        try {
            Client client = getClientConfig(url);
            WebResource resource = client.resource(url);
            ClientResponse response = null;
            if (SHARE_KEY_AUTH_ENABLE) {// 使用共享密钥认证
                // 请求UTC时间
                long lCurTime = System.currentTimeMillis();
                // 获取本地IP
                InetAddress ia = InetAddress.getLocalHost();
                String localip = ia.getHostAddress();
                String token = lCurTime + "," + localip + "," + CLIENT_SYSTEM_CODE;
                String encodeToken = AES256Encryption.encrypt(token);
                response = resource.header("tokenkey", encodeToken).type(MediaType.APPLICATION_JSON)
                        .post(ClientResponse.class, postObject);
            } else {// 不使用共享密钥认证
                response = resource.type(MediaType.APPLICATION_JSON).post(ClientResponse.class, postObject);
            }
            if (Status.OK.equals(response.getClientResponseStatus())) {
                String resultString = response.getEntity(String.class);
                if (!StringUtil.isBlank(resultString)) {
                    return JSON.parseObject(resultString, c);
                }
            }
            return null;
        } catch (Exception e) {
            if (logger.isErrorEnabled()) {
                logger.error(e);
            }
            throw e;
        }

    }

    /**
     * 获取客户端配置
     * 
     * @throws Exception
     */
    public static Client getClientConfig(String url) throws Exception {
        ClientConfig config = new DefaultClientConfig(FastJSONProvider.class);
        if (url != null && url.startsWith("https")) {// https
            SSLContext ctx = SSLContext.getInstance("TLS");
            TrustManager[] tm = { new MyX509TrustManager() };
            ctx.init(null, tm, null);
            config.getProperties().put(HTTPSProperties.PROPERTY_HTTPS_PROPERTIES,
                    new HTTPSProperties(new TrustAnyHostnameVerifier(), ctx));
        }
        return Client.create(config);
    }
}

getResponseFromServer方法可以放入工具类，以下是代码片段

public static String getResponseFromServer(final URL constructedUrl, final HttpURLConnectionFactory factory,
            final String encoding) {

        HttpURLConnection conn = null;
        HttpsURLConnection httpsConn = null;// https连接 20210205
        InputStreamReader in = null;
        try {
            if (constructedUrl != null && constructedUrl.toString().startsWith("https")) {//https
                httpsConn = (HttpsURLConnection) constructedUrl.openConnection();
                TrustManager[] tm = { new MyX509TrustManager() };

                SSLContext ctx = SSLContext.getInstance("TLS");
                ctx.init(null, tm, null);

                httpsConn.setSSLSocketFactory(ctx.getSocketFactory());
                httpsConn.setHostnameVerifier(new TrustAnyHostnameVerifier());
                if (CommonUtils.isEmpty(encoding)) {
                    in = new InputStreamReader(httpsConn.getInputStream());
                } else {
                    in = new InputStreamReader(httpsConn.getInputStream(), encoding);
                }
            } else {//http
                conn = factory.buildHttpURLConnection(constructedUrl.openConnection());
                if (CommonUtils.isEmpty(encoding)) {
                    in = new InputStreamReader(conn.getInputStream());
                } else {
                    in = new InputStreamReader(conn.getInputStream(), encoding);
                }
            }

            final StringBuilder builder = new StringBuilder(255);
            int byteRead;
            while ((byteRead = in.read()) != -1) {
                builder.append((char) byteRead);
            }

            return builder.toString();
        } catch (final RuntimeException e) {
            throw e;
        } catch (final SSLException e) {
            LOGGER.error("SSL error getting response from host: {} : Error Message: {}", constructedUrl.getHost(),
                    e.getMessage(), e);
            throw new RuntimeException(e);
        } catch (final IOException e) {
            LOGGER.error("Error getting response from host: [{}] with path: [{}] and protocol: [{}] Error Message: {}",
                    constructedUrl.getHost(), constructedUrl.getPath(), constructedUrl.getProtocol(), e.getMessage(),
                    e);
            throw new RuntimeException(e);
        } catch (NoSuchAlgorithmException e) {
            LOGGER.error("NoSuchAlgorithmException: {}", e);
            throw new RuntimeException(e);
        } catch (KeyManagementException e) {
            LOGGER.error("KeyManagementException: {}", e);
            throw new RuntimeException(e);
        } finally {
            closeQuietly(in);
            if (conn != null) {
                conn.disconnect();
            }
            if (httpsConn != null) {
                httpsConn.disconnect();
            }
        }
    }

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http、https请求 参考示例  https://www.cnblogs.com/pxblog/p/10524167.html

http、https协议基础 https://blog.csdn.net/weixin_39942213/article/details/111264847