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");

        }

    }

}