java实现httpclient发送post请求

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

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");

如果有什么问题,或者缺什么工具,jar之类的  请联系我   [e-mail]