java实现httpclient发送post请求

红太狼 2022-06-04 02:22 463阅读 0赞

需求:现在要在java后端接口中直接请求客户提供的其他接口来获取所需要的数据,那么就需要用到httpclient来做,下面做一个实现以记录...

**第一步:导入所需要的jar包并写一个工具类**

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1.post请求工具类

因为我们需要的协议是https协议,所以我做了一个httpsPostUtil

package com.qs.util;
    
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.util.EntityUtils;
    
    /**
     * 利用HttpClient进行post请求的工具类
     *
     * @author Devin <xxx>
     * @ClassName: HttpClientUtil
     * @Description: TODO
     * @date 2017年2月7日 下午1:43:38
     */
    public class HttpsPostUtil {
        public static String doPost(String url, String charset) {
            HttpClient httpClient = null;
            HttpPost httpPost = null;
            String result = null;
            try {
                httpClient = new SSLClient();
                httpPost = new HttpPost(url);
                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;
        }
    }

2.用于进行Https请求的HttpClient

package com.qs.util;
    
    import org.apache.http.conn.ClientConnectionManager;
    import org.apache.http.conn.scheme.Scheme;
    import org.apache.http.conn.scheme.SchemeRegistry;
    import org.apache.http.conn.ssl.SSLSocketFactory;
    import org.apache.http.impl.client.DefaultHttpClient;
    
    import javax.net.ssl.SSLContext;
    import javax.net.ssl.TrustManager;
    import javax.net.ssl.X509TrustManager;
    import java.security.cert.CertificateException;
    import java.security.cert.X509Certificate;
    
    /**
     * 用于进行Https请求的HttpClient
     *
     * @author Devin <xxx>
     * @ClassName: SSLClient
     * @Description: TODO
     * @date 2017年2月7日 下午1:42:07
     */
    public class SSLClient extends DefaultHttpClient {
        public SSLClient() throws Exception {
            super();
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                public void checkClientTrusted(X509Certificate[] chain,
                                               String authType) throws CertificateException {
                }
    
                public void checkServerTrusted(X509Certificate[] chain,
                                               String authType) throws CertificateException {
                }
    
                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));
        }
    }

**第二步:java中调用方式**

String url = "https://www.aaa.com/sss/?a=" + a + "&b=" + b + "&c=" + c + "&d=" + d;
    			String httpsRtn = HttpsPostUtil.doPost(url, "UTF-8");
    			Map<String, Object> json = mapper.readValue(httpsRtn, Map.class);
    			String id = (String) json.get("id");

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[Center]: /images/20220604/776725378adb435cbaf01c3ee4232c44.png