JAVA利用HttpClient进行POST请求（HTTPS）

目前，要为另一个项目提供接口，接口是用HTTP URL实现的，最初的想法是另一个项目用JQuery post进行请求。

但是，很可能另一个项目是部署在别的机器上，那么就存在跨域问题，而JQuery的post请求是不允许跨域的。

这时，就只能够用HttpClient包进行请求了，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

  1. import java.security.cert.CertificateException;  
  2. import java.security.cert.X509Certificate;  
  3. import javax.net.ssl.SSLContext;  
  4. import javax.net.ssl.TrustManager;  
  5. import javax.net.ssl.X509TrustManager;  
  6. import org.apache.http.conn.ClientConnectionManager;  
  7. import org.apache.http.conn.scheme.Scheme;  
  8. import org.apache.http.conn.scheme.SchemeRegistry;  
  9. import org.apache.http.conn.ssl.SSLSocketFactory;  
  10. import org.apache.http.impl.client.DefaultHttpClient;  
  11. //用于进行Https请求的HttpClient  
  12. public class SSLClient extends DefaultHttpClient{  
  13.     public SSLClient() throws Exception{  
  14.         super();  
  15.         SSLContext ctx = SSLContext.getInstance("TLS");  
  16.         X509TrustManager tm = new X509TrustManager() {  
  17.                 @Override  
  18.                 public void checkClientTrusted(X509Certificate[] chain,  
  19.                         String authType) throws CertificateException {  
  20.                 }  
  21.                 @Override  
  22.                 public void checkServerTrusted(X509Certificate[] chain,  
  23.                         String authType) throws CertificateException {  
  24.                 }  
  25.                 @Override  
  26.                 public X509Certificate[] getAcceptedIssuers() {  
  27.                     return null;  
  28.                 }  
  29.         };  
  30.         ctx.init(null, new TrustManager[]{tm}, null);  
  31.         SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);  
  32.         ClientConnectionManager ccm = this.getConnectionManager();  
  33.         SchemeRegistry sr = ccm.getSchemeRegistry();  
  34.         sr.register(new Scheme("https", 443, ssf));  
  35.     }  
  36. }  


2.写一个利用HttpClient发送post请求的类

  1. import java.util.ArrayList;  
  2. import java.util.Iterator;  
  3. import java.util.List;  
  4. import java.util.Map;  
  5. import java.util.Map.Entry;  
  6. import org.apache.http.HttpEntity;  
  7. import org.apache.http.HttpResponse;  
  8. import org.apache.http.NameValuePair;  
  9. import org.apache.http.client.HttpClient;  
  10. import org.apache.http.client.entity.UrlEncodedFormEntity;  
  11. import org.apache.http.client.methods.HttpPost;  
  12. import org.apache.http.message.BasicNameValuePair;  
  13. import org.apache.http.util.EntityUtils;  
  14. /* 
  15.  * 利用HttpClient进行post请求的工具类 
  16.  */  
  17. public class HttpClientUtil {  
  18.     public String doPost(String url,Map<String,String> map,String charset){  
  19.         HttpClient httpClient = null;  
  20.         HttpPost httpPost = null;  
  21.         String result = null;  
  22.         try{  
  23.             httpClient = new SSLClient();  
  24.             httpPost = new HttpPost(url);  
  25.             //设置参数  
  26.             List<NameValuePair> list = new ArrayList<NameValuePair>();  
  27.             Iterator iterator = map.entrySet().iterator();  
  28.             while(iterator.hasNext()){  
  29.                 Entry<String,String> elem = (Entry<String, String>) iterator.next();  
  30.                 list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));  
  31.             }  
  32.             if(list.size() > 0){  
  33.                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset);  
  34.                 httpPost.setEntity(entity);  
  35.             }  
  36.             HttpResponse response = httpClient.execute(httpPost);  
  37.             if(response != null){  
  38.                 HttpEntity resEntity = response.getEntity();  
  39.                 if(resEntity != null){  
  40.                     result = EntityUtils.toString(resEntity,charset);  
  41.                 }  
  42.             }  
  43.         }catch(Exception ex){  
  44.             ex.printStackTrace();  
  45.         }  
  46.         return result;  
  47.     }  
  48. }  

3.调用post请求的测试代码

  1. import java.util.HashMap;  
  2. import java.util.Map;  
  3. //对接口进行测试  
  4. public class TestMain {  
  5.     private String url = "https://192.168.1.101/";  
  6.     private String charset = "utf-8";  
  7.     private HttpClientUtil httpClientUtil = null;  
  8.       
  9.     public TestMain(){  
  10.         httpClientUtil = new HttpClientUtil();  
  11.     }  
  12.       
  13.     public void test(){  
  14.         String httpOrgCreateTest = url + "httpOrg/create";  
  15.         Map<String,String> createMap = new HashMap<String,String>();  
  16.         createMap.put("authuser","*****");  
  17.         createMap.put("authpass","*****");  
  18.         createMap.put("orgkey","****");  
  19.         createMap.put("orgname","****");  
  20.         String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);  
  21.         System.out.println("result:"+httpOrgCreateTestRtn);  
  22.     }  
  23.       
  24.     public static void main(String[] args){  
  25.         TestMain main = new TestMain();  
  26.         main.test();  
  27.     }  
  28. }  


httpClient4.2的jar包下载路径：http://download.csdn.net/detail/hqmryang/4582440#comment

项目实际应用：

package com.xxx.ctemm.util;

import com.alibaba.fastjson.JSONObject;
import com.google.gson.Gson;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Created by xxxon 2017/8/14.
 */
public class HttpClientUtil {
    private static final Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);
    /**
     * post请求
     * @param url         url地址
     * @return
     */
    public static JSONObject doPost(String url, Map<String, String> params){
        // 创建默认的httpClient实例.
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = null;
        CloseableHttpResponse response = null;
        JSONObject jsonResult = null;
        try{
            List<NameValuePair> pairs = null;
            if (params != null && !params.isEmpty()) {
                pairs = new ArrayList<NameValuePair>(params.size());
                for (Map.Entry<String,String> entry : params.entrySet()) {
                    pairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
            }
            // 创建httppost
            httpPost = new HttpPost(url);
            if (pairs != null && !pairs.isEmpty()) {
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(pairs, Charset.forName("UTF-8"));
                httpPost.setEntity(entity);
            }
            //4.3版本超时设置,设置请求和传输超时时间
            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(30000).setConnectTimeout(30000).build();
            httpPost.setConfig(requestConfig);
            response = httpClient.execute(httpPost);
            /**请求发送成功，并得到响应**/
            if (response.getStatusLine().getStatusCode() == 200) {
                logger.error("POST请求发送成功，并得到响应");
                String str;
                try {
                    /**读取服务器返回过来的json字符串数据**/
                    HttpEntity httpEntity = response.getEntity();
                    str = EntityUtils.toString(httpEntity);
                    Gson gson = new Gson();
                    logger.info("URL:["+url + "];Params:[" + gson.toJson(params) +"];Response:[" + str + "].");
                    /**把json字符串转换成json对象**/
                    jsonResult = JSONObject.parseObject(str);
                } catch (Exception e) {
                    logger.error("json字符串转换成json对象异常:" + url, e);
                    return null;
                }
            }else{
                logger.error("POST请求异常，异常码是："+ response.getStatusLine().getStatusCode());
                return null;
            }
        } catch (IOException e) {
            logger.error("post请求提交失败:" + url, e);
            return null;
        }finally{
            try {
                if (null != response) {
                    response.close();
                    httpClient.close();
                }
            } catch (IOException e) {
                logger.error("关闭资源异常",e);
            }
        }
        return jsonResult;
    }
}
posted @ 2018-06-16 11:47  舞羊  阅读(5766)  评论(0)  编辑  收藏  举报