HttpClientUtil工具类

package com.java.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.net.URI;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author jiangli
 * @date 2018/5/22 9:59
 * 发送post和get请求
 * 返回值为响应的json字符串
 */
public class HttpClientUtil {
    /**
     * @param url      发送请求的 URL
     * @param postData 需要post的数据
     * @param headers  请求头
     * @return 所代表远程资源的响应结果
     */
    public static String dopost(String url, String postData, Map<String, String> headers) {
        HttpPost post = new HttpPost();
        HttpResponse response = null;
        try {
            post.setURI(new URI(url));
            if (StringUtils.isNotBlank(postData)) {
                post.setEntity(new StringEntity(postData, "UTF-8"));
            }
            if (MapUtils.isNotEmpty(headers)) {
                for (Map.Entry<String, String> entry : headers.entrySet()) {
                    post.addHeader(entry.getKey(), entry.getValue());
                }
            }
            HttpClient httpClient = HttpClients.createDefault();
            response = httpClient.execute(post);
            return EntityUtils.toString(response.getEntity(), "UTF-8");
        } catch (Exception e) {
            throw new RuntimeException("got an error from HTTP for url:" + url, e);
        } finally {
            if (response != null) {
                EntityUtils.consumeQuietly(response.getEntity());
            }
            post.releaseConnection();
        }
    }

    public static String doget(String url, Map<String, String> headers) {
        HttpGet get = new HttpGet();
        HttpResponse response = null;
        try {
            get.setURI(new URI(url));
            if (MapUtils.isNotEmpty(headers)) {
                for (Map.Entry<String, String> entry : headers.entrySet()) {
                    get.addHeader(entry.getKey(), entry.getValue());
                }
            }
            HttpClient httpClient = HttpClients.createDefault();
            response = httpClient.execute(get);
            return EntityUtils.toString(response.getEntity());
        } catch (Exception e) {
            throw new RuntimeException("got an error from HTTP for url:" + url, e);
        } finally {
            if (response != null) {
                EntityUtils.consumeQuietly(response.getEntity());
            }
            get.releaseConnection();
        }
    }

    public static void main(String[] args) {

        // 请求头
        Map<String, String> headers = new HashMap<String, String>();
        headers.put("Content-Type", "application/json; charset=utf-8");
        headers.put("accept", "application/json; charset=utf-8");
        // 进行http的post请求
        JSONObject js = JSONObject.parseObject(dopost(
                "https://test-api.pingan.com.cn:20443/oauth/oauth2/access_token?client_id=P_OKAY001&grant_type=client_credentials&client_secret=VuVEh743",
                null, headers));
        String token = ((JSONObject) js.get("data")).getString("access_token");
        //System.out.println(token);

        String aeskey = "802CE4BBD34F1B65";
        JSONObject jo = new JSONObject();
        jo.put("couponNo", "66666666");
        jo.put("partnerOrderId", "777777");
        jo.put("outletId", "9999999");
        String data = jo.toString();
        data = AESUtils.encrypt(data, aeskey);
        System.err.println(data);

        String req = "https://test-api.pingan.com.cn:20443/open/appsvr/property/partner/redemption?access_token=" + token + "&request_id=P_HQMC999&userName=13788888305";
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("data",
                data);
        jsonObject.put("partnerId", "P_HUANQIUMINGCHE");
        jsonObject.put("timestamp", new Date().getTime());

        // 生成需要post的json字符串
        String postData = jsonObject.toJSONString();

        String resp = dopost(req, postData, headers);
        System.out.println(resp);
//		JSONObject po = JSONObject.parseObject(resp);
//		String string = ((JSONObject) po.get("data")).getString("message");
//		System.out.println("message is "+string);

    }
}

补充:上面Main方法用Restlet Client模拟后的返回如下

如何取出data中的message:

JSONObject po = JSONObject.parseObject(resp);
String string = ((JSONObject) po.get("data")).getString("message");
System.out.println("message is "+string);