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在java中Https请求Api

请求视频接口，接口是Https的，因为牵扯到跨域问题所以用后端来进行请求，用HttpClient包进行请求，同时由于请求的URL是HTTPS的，为了避免需要证书，所以用一个类继承DefaultHttpClient类，来忽略校验过程。

1.引入maven库

在项目的的pom文件中引入

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.6</version>
        </dependency>

2.创建SSLClient类，继承至HttpClient

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;
public class SSLClient extends DefaultHttpClient{
    public SSLClient() throws Exception{
        super();
        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));
    }
}

3.创建HttpClient类来发送post请求

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
public class HttpClientUtil  {
    public String doPost(String url,Map<String,String> map,String charset){
        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()){
                Entry<String,String> elem = (Entry<String, String>) iterator.next();
                list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));
            }
            if(list.size() > 0){
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset);
                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;
    }
}

4.创建业务类

import java.util.HashMap;  
import java.util.Map;  
//对接口进行测试  
public class Business{  
    private String url = "";  /*请求连接url*/
    private String charset = "utf-8";  
    private HttpClientUtil httpClientUtil = null;  
      
    public Business(){  
        httpClientUtil = new HttpClientUtil();  
    }  
    public void test(){  
        String httpOrgCreateTest = url + "httpOrg/create";  
        Map<String,String> createMap = new HashMap<String,String>();  /*createMap为post请求携带参数createMap.put("key","value");*/
        String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);  
        System.out.println("result:"+httpOrgCreateTestRtn);  
    }  
    public static void main(String[] args){  
        Business main = new Business();  
        main.test();  
    }  
}