httpClient4请求工具类实现

package com.http;

import java.net.URI;

import java.util.ArrayList;

import java.util.List;

import org.apache.commons.collections.CollectionUtils;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

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.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.params.CoreConnectionPNames;

import org.apache.http.util.EntityUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONObject;

public class HttpClientUtil {

private static final String ENCODE = "UTF-8";

private static final Logger LOGGER = LoggerFactory.getLogger(HttpClientUtil.class);

public static final Integer CONNECTION_TIMEOUT = 5000;

public static final Integer SO_TIMEOUT = 5000;

/**
 * get请求，参数拼接好
 * @Description TODO(描述)
 * @Author wangymd
 * @Date 2021-10-22 20:10:04 
 * @param url
 * @return
 *
 */
public static String get(String url) {
  try {
    HttpClient httpClient = new DefaultHttpClient();
    httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONNECTION_TIMEOUT);
    httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, SO_TIMEOUT);

    HttpGet httpGet = new HttpGet(url);
    HttpResponse response = httpClient.execute(httpGet);
    if (null == response.getStatusLine() || 200 != response.getStatusLine().getStatusCode()) {
      return null;
    }

    HttpEntity entity = response.getEntity();
    return EntityUtils.toString(entity, ENCODE);
  } catch (Exception e) {
    LOGGER.error("get request error url:{}, e:{}",url, e);
  }
  return null;
}

/**
 * get请求url不带？
 * @Description TODO(描述)
 * @Author wangymd
 * @Date 2021-10-22 20:09:34 
 * @param url
 * @param params
 * @return
 *
 */
public static String get(String url, List<NameValuePair> params) {
  try {
    HttpClient httpClient = new DefaultHttpClient();
    httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONNECTION_TIMEOUT);
    httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, SO_TIMEOUT);

    HttpGet httpGet = new HttpGet(url);

    //参数设置
    if(CollectionUtils.isNotEmpty(params)) {
      String paramStr = EntityUtils.toString(new UrlEncodedFormEntity(params));
      httpGet.setURI(new URI(httpGet.getURI().toString() + "?" + paramStr));
    }

    HttpResponse response = httpClient.execute(httpGet);
    if (null == response.getStatusLine() || 200 != response.getStatusLine().getStatusCode()) {
      return null;
    }

    HttpEntity entity = response.getEntity();
    return EntityUtils.toString(entity, ENCODE);
  } catch (Exception e) {
    LOGGER.error("get request error url:{}, timeout:{}, e:{}",url, JSON.toJSONString(params), e);
  }
  return null;
}

/**
 * post请求json参数
 * @Description TODO(描述)
 * @Author wangymd
 * @Date 2021-10-22 20:06:20 
 * @param url
 * @param params
 * @return
 *
 */
public static String post(String url, List<NameValuePair> params) {
  try {
    HttpClient httpClient = new DefaultHttpClient();
    httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONNECTION_TIMEOUT);
    httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, SO_TIMEOUT);

    HttpPost httpPost = new HttpPost(url);
    httpPost.setHeader("Content-type", "application/json;charset=utf-8");
    httpPost.setHeader("Connection", "Close");

    //参数设置
    JSONObject jsonObject = new JSONObject();
    if(CollectionUtils.isNotEmpty(params)) {
      for (NameValuePair nameValuePair : params) {
        jsonObject.put(nameValuePair.getName(), nameValuePair.getValue());
      }
    }
    StringEntity stringEntity = new StringEntity(jsonObject.toJSONString());
    stringEntity.setContentType("application/json");
    stringEntity.setContentEncoding(ENCODE);
    httpPost.setEntity(stringEntity);

    HttpResponse response = httpClient.execute(httpPost);
    if (null == response.getStatusLine() || 200 != response.getStatusLine().getStatusCode()) {
      return null;
    }

    HttpEntity entity = response.getEntity();
    return EntityUtils.toString(entity, ENCODE);
  } catch (Exception e) {
    LOGGER.error("post request error url:{}, timeout:{}, e:{}",url, JSON.toJSONString(params), e);
  }
  return null;
}

/**
 * 测试
 * @Description TODO(描述)
 * @Author wangymd
 * @Date 2021-10-20 11:17:26 
 * @param args
 * @throws Exception
 *
 */
  public static void main(String[] args) throws Exception {
    String accesstoken = "xxxxxx";
    List<NameValuePair> nvps = new ArrayList <NameValuePair>();
    nvps.add(new BasicNameValuePair("p1", "p1"));
    nvps.add(new BasicNameValuePair("p2", "p2"));

    String result = HttpClientUtil.post("https://api.weixin.qq.com/mmec/api/XXXX?access_token=" + accesstoken, nvps);

      System.out.println(result);
  }

}