HttpClient 使用案例

package com.qifeng.config.ygx.common.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.SneakyThrows;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
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.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.*;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

/**
 * @author zhao xin
 * @Title: HttpClientUtil
 * @ProjectName as_configurer
 * @Description: TODO
 * @date 2019/9/21  13:51
 */
public class HttpClientUtil {

   //同步get方式的请求 其中 uri 是请求的地址如：http://www.baidu.com
   //主要http不能省略，否则会报 没有指明协议 的错误 如果需要带数据 则以uri?a=sss 形式即可
    public void doGet() throws ClientProtocolException, IOException {
        //创建CloseableHttpClient
        HttpClientBuilder builder = HttpClientBuilder.create();
        CloseableHttpClient client = builder.build();
        //执行
        HttpUriRequest httpGet = new HttpGet("uri");
        CloseableHttpResponse response = client.execute(httpGet);
        HttpEntity entity = response.getEntity();
        if(entity!=null){
            String  entityStr= EntityUtils.toString(entity,"utf-8");
            System.out.println(entityStr);
        }
//        System.out.println(response.toString());
    }

    //同步post请求方式： 请求中需要带的数据通过
    //
    // httpPost.setEntity(new StringEntity("beppe", "UTF-8"));的方式，
    //如果需要带的数据是对象的形式，则转化为json字符串格式
    public void doPost() throws ClientProtocolException, IOException{
        HttpClientBuilder builder = HttpClientBuilder.create();
        CloseableHttpClient client = builder.build();
        HttpPost httpPost= new HttpPost("uri");
        httpPost.setEntity(new StringEntity("beppe", "UTF-8"));
        CloseableHttpResponse response = client.execute(httpPost);
        HttpEntity entity = response.getEntity();
        if(entity!=null){
            String  entityStr= EntityUtils.toString(entity,"utf-8");
            System.out.println(entityStr);
        }
//        System.out.println(response.toString());
    }

     //异步get请求：
    public void doGetAsyn() throws InterruptedException, ExecutionException {
        CloseableHttpAsyncClient httpclient = HttpAsyncClients.createDefault();
        //开启httpclient
        httpclient.start();
        //开始执行
        HttpGet httpGet = new HttpGet("uri");
        Future<HttpResponse> future = httpclient.execute(httpGet, null);
        HttpResponse httpResponse = future.get();
        System.out.println(httpResponse.getStatusLine()+"==="+httpGet.getRequestLine());
    }

    //异步的post方式请求：其中可以在回调函数中加入自己的业务逻辑
    public static void doPostAsyn(String url,String outStr) throws ParseException, IOException, InterruptedException, ExecutionException{
        CloseableHttpAsyncClient httpAsyncClient =  HttpAsyncClients.createDefault();
        httpAsyncClient.start();
        HttpPost httpost = new HttpPost(url);
//        httpost.addHeader(HTTP.CONTENT_TYPE, "application/json");
        StringEntity se=new StringEntity(outStr,"UTF-8");
        se.setContentType("application/json");
        se.setContentEncoding(new BasicHeader("Content-Type", "application/json"));
        httpost.setEntity(se);
        Future<HttpResponse> future = httpAsyncClient.execute(httpost,null);
        System.out.println(future.get().toString());
        //String result = EntityUtils.toString(response.getEntity(),"UTF-8");
        //jsonObject = JSONObject.fromObject(result);
    }

    @SneakyThrows
    public static String DoPost(String url, JSONObject params){
        HttpClientBuilder builder = HttpClientBuilder.create();
        CloseableHttpClient client = builder.build();
        HttpPost httpPost= new HttpPost(url);

        List<BasicNameValuePair> list=new ArrayList<>();

        if(params!=null) {
            if(params.get("Content-Type")!=null){
                httpPost.addHeader("Content-Type", params.get("Content-Type").toString());
            }
            if(params.get("UserName")!=null){
                httpPost.addHeader("UserName", params.get("UserName").toString());

            }
            if(params.get("type")!=null){
                JSONObject Json = new JSONObject();
                Json.put("type", params.get("type").toString());
                StringEntity entity = new StringEntity(Json.toString(), ContentType.APPLICATION_JSON);
                httpPost.setEntity(entity);
            }
            if(params.get("stationId")!=null){
                list.add(new BasicNameValuePair("stationId", params.get("stationId").toString()));
            }
        }

        if(params.get("Content-Type")==null) {
            httpPost.setEntity(new UrlEncodedFormEntity(list, "UTF-8"));
            httpPost.addHeader(HTTP.CONTENT_TYPE, "application/x-www-form-urlencoded");
        }
        CloseableHttpResponse response = client.execute(httpPost);
        HttpEntity entity = response.getEntity();
        if(entity!=null){
            String  entityStr= EntityUtils.toString(entity,"utf-8");
            return  entityStr;
        }else{
            return null;
        }
    }

}