JAVA利用HttpClient进行POST请求(HTTPS)实例

最近，需要对客户的接口做一个包装，然后供自己公司别的系统调用，客户接口是用HTTP URL实现的，我想用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，忽略校验过程。

1.写一个SSLClient类，继承至HttpClient

package com.pcmall.service.sale.miaomore.impl; 

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
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;
//用于进行Https请求的HttpClient
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));
  }
}  

2.写一个利用HttpClient发送post请求的类

package com.pcmall.service.sale.miaomore.impl; 

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
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;
/*
 * 利用HttpClient进行post请求的工具类
 */
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;
  }
}  

3.调用post请求的测试代码

package com.pcmall.service.sale.miaomore.impl; 

import java.util.HashMap;
import java.util.Map;
//对接口进行测试
public class TestMain {
  private String url = "https://xxx.xxx.xxx/";
  private String charset = "utf-8";
  private HttpClientUtil httpClientUtil = null;  

  public TestMain(){
    httpClientUtil = new HttpClientUtil();
  }  

  public void test(){
    String httpOrgCreateTest = url + "xxx/xxx/delivery";
    Map<String,String> createMap = new HashMap<String,String>();
    createMap.put("delivery_code","1D1QZ222Z22SM21A");
    createMap.put("timestamp","1479198840000");
    createMap.put("sign","F2109C333F3EADE929F932E89703FA0F683D43EB");
    String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);
    System.out.println("result:"+httpOrgCreateTestRtn);
  }  

  public static void main(String[] args){
    TestMain main = new TestMain();
    main.test();
  }
}  

刚开始不是很明白BasicNameValuePair的用法，后来慢慢摸索了一下，发现BasicNameValuePair是存储键值对的类，当添加新的key和value值，它会自动给装换成http的格式，=和&符号，比如https://xxx.xxx.xxx/xxx/xxxx/delivery?delivery_code=DQZZSM2A&timestamp=1479198840000&sign=F209C33FEADE99F93E8970FA0F68D3EB，我们都不用自己进行拼接和匹配了，个人觉得它用起来还是挺方便而且准确度也高，希望可以帮助到大家！

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