HttpComponents源码目录：http://www.boyunjian.com/javasrc/org.apache.httpcomponents/httpclient/4.3.4/_/

package  com.bbkj.utils;


import com.alibaba.fastjson.JSON;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.util.*;

public class HttpUtils{

    private static PoolingHttpClientConnectionManager connectionManager = null;
    private static HttpClientBuilder httpBulder = null;
    private static RequestConfig requestConfig = null;

    private static int MAXCONNECTION = 10;

    private static int DEFAULTMAXCONNECTION = 5;

    private static String IP = "abc.com";
    private static int PORT = 80;

    static {
        //设置http的状态参数
        requestConfig = RequestConfig.custom()
                .setSocketTimeout(5000)
                .setConnectTimeout(5000)
                .setConnectionRequestTimeout(5000)
                .build();

        HttpHost target = new HttpHost(IP, PORT);
        connectionManager = new PoolingHttpClientConnectionManager();
        connectionManager.setMaxTotal(MAXCONNECTION);
        connectionManager.setDefaultMaxPerRoute(DEFAULTMAXCONNECTION);
        connectionManager.setMaxPerRoute(new HttpRoute(target), 20);
        httpBulder = HttpClients.custom();
        httpBulder.setConnectionManager(connectionManager);
    }

    public static CloseableHttpClient getConnection() {
        CloseableHttpClient httpClient = httpBulder.build();
        httpClient = httpBulder.build();
        return httpClient;
    }


    public static HttpUriRequest getRequestPost(Map<String, Object> map, String url) {
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        Set<Map.Entry<String, Object>> entrySet = map.entrySet();
        HttpUriRequest reqMethod = null;
        StringEntity stringEntity = new StringEntity(JSON.toJSONString(map), ContentType.APPLICATION_JSON);
        reqMethod = RequestBuilder.post().setUri(url)
                    .setEntity(stringEntity)
                    .setConfig(requestConfig).build();
        return reqMethod;
    }

    public static HttpUriRequest getRequestGet(Map<String, String> map, String url) {
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        Set<Map.Entry<String, String>> entrySet = map.entrySet();
        for (Map.Entry<String, String> e : entrySet) {
            String name = e.getKey();
            String value = e.getValue();
            NameValuePair pair =  new BasicNameValuePair(name, value);
            params.add(pair);
        }
        HttpUriRequest reqMethod = null;
        reqMethod = RequestBuilder.get().setUri(url)
                    .addParameters(params.toArray(new BasicNameValuePair[params.size()]))
                    .setConfig(requestConfig).build();
        return reqMethod;
    }



    public static void main(String args[]) throws Exception {
        Map<String, Object> map = new HashMap<String, Object>();
//        map.put("startindex", "1");
//        map.put("size", "2");

        map.put("sn","1");
        map.put("index",1);
        map.put("heart_rate",1);
        map.put("resp_rate",1);
        map.put("leave_Bed",true);
        map.put("leave_bed_time",1);
        map.put("timestamp",1);
        map.put("bedNo","1");

        /***
         *  String sn;                 //设备编号
         Integer index;               //序号
         Integer heart_rate;          //心率
         Integer resp_rate;           //呼吸/分钟
         Boolean leave_Bed;           //false：未离床，true：离床
         Integer leave_bed_time;      //离床时间(分钟)
         Long timestamp;
         String bedNo;
         */

        HttpClient client = getConnection();
        HttpUriRequest post = getRequestPost(map, "http://abc.com/bed/submit/data");
        HttpResponse response = client.execute(post);
        System.out.println(response.getStatusLine().getStatusCode() );
        if (response.getStatusLine().getStatusCode() == 200) {
            HttpEntity entity = response.getEntity();
            String message = EntityUtils.toString(entity, "utf-8");
            System.out.println(message);
        } else {
            System.out.println("请求失败");
        }
    }
}