HttpClient工具

HttpClient工具

import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
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.utils.URIBuilder;
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.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.http.HttpHeaders;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @ClassName: HttpClientUtil
 *
 * @description: //请求工具类
 * @author: sun
 * @create: 2020-09-04 16:09
 */
public class HttpClientUtil {
  // 带参数的get请求
  public static String doGet(String url, Map<String, String> param) {
    // 创建Httpclient对象
    CloseableHttpClient httpclient = HttpClients.createDefault();
    String resultString = "";
    CloseableHttpResponse response = null;
    try {
      // 创建uri
      URIBuilder builder = new URIBuilder(url);
      if (param != null) {
        for (String key : param.keySet()) {
          builder.addParameter(key, param.get(key));
        }
      }
      URI uri = builder.build();
      // 创建http GET请求
      HttpGet httpGet = new HttpGet(uri);
      // 执行请求
      response = httpclient.execute(httpGet);
      // 判断返回状态是否为200
      if (response.getStatusLine().getStatusCode() == 200) {
        resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
      }
    } catch (Exception e) {
      // e.printStackTrace();
    } finally {
      try {
        if (response != null) {
          response.close();
        }
        httpclient.close();
      } catch (IOException e) {
        // e.printStackTrace();
      }
    }
    return resultString;
  }

  // 不带参数的get请求
  public static String doGet(String url) {
    return doGet(url, null);
  }

  // 带参数的POST请求
  public static String doPost(String url, Map<String, String> param) {
    // 创建Httpclient对象
    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;
    String resultString = "";
    try {
      // 创建Http Post请求
      HttpPost httpPost = new HttpPost(url);
      // 创建参数列表
      if (param != null) {
        List<NameValuePair> paramList = new ArrayList<NameValuePair>();
        for (String key : param.keySet()) {
          paramList.add(new BasicNameValuePair(key, param.get(key)));
        }
        // 模拟表单
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
        httpPost.setEntity(entity);
      }
      // 执行http请求
      response = httpClient.execute(httpPost);
      resultString = EntityUtils.toString(response.getEntity(), "utf-8");
    } catch (Exception e) {
      // e.printStackTrace();
    } finally {
      try {
        if (response != null) {
          response.close();
        }
      } catch (IOException e) {
        // e.printStackTrace();
      }
    }
    return resultString;
  }

  // 不带参数的post请求
  public static String doPost(String url) {
    return doPost(url, null);
  }

  // POST请求json参数
  public static String doPostJson(String url, String json) {
    // 创建Httpclient对象
    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;
    String resultString = "";
    try {
      // 创建Http Post请求
      HttpPost httpPost = new HttpPost(url);
      // 创建请求内容
      StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
      httpPost.setEntity(entity);
      // 执行http请求
      response = httpClient.execute(httpPost);
      resultString = EntityUtils.toString(response.getEntity(), "utf-8");
    } catch (Exception e) {
      // e.printStackTrace();
    } finally {
      try {
        if (response != null) {
          response.close();
        }
      } catch (IOException e) {
        // e.printStackTrace();
      }
    }
    return resultString;
  }

  // POST  有参无参  加请求头
  public static String sendPOSTRequest(String url, String json, String headersss) {
    // 创建Httpclient对象
    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;
    // 设置超时5s
    RequestConfig config =
        RequestConfig.custom().setConnectTimeout(5000).setSocketTimeout(5000).build();
    String resultString = "";
    try {
      // 创建Http Post请求
      HttpPost httpPost = new HttpPost(url);
      // 设置请求头 把token 和key 放到headers里
      HttpHeaders headers = new HttpHeaders();
      // 设置token

      httpPost.addHeader("access_token", headersss);
      // 创建请求内容
      StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
      httpPost.setEntity(entity);
      httpPost.setConfig(config);
      // 执行http请求
      response = httpClient.execute(httpPost);
      resultString = EntityUtils.toString(response.getEntity(), "utf-8");
    } catch (Exception e) {
      // e.printStackTrace();
    } finally {
      try {
        if (response != null) {
          response.close();
        }
      } catch (IOException e) {
        // e.printStackTrace();
      }
    }
    return resultString;
  }

  // 直接返回对象
  public static JSONObject doPostReJSON(String url, Map<String, Object> param) {
    // 创建Httpclient对象
    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;
    JSONObject json = null;
    try {
      // 创建Http Post请求
      HttpPost httpPost = new HttpPost(url);
      // 创建参数列表
      if (param != null) {
        List<NameValuePair> paramList = new ArrayList<NameValuePair>();
        for (String key : param.keySet()) {
          paramList.add(new BasicNameValuePair(key, String.valueOf(param.get(key))));
        }
        // 模拟表单
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
        httpPost.setEntity(entity);
      }
      // 执行http请求
      response = httpClient.execute(httpPost);
      HttpEntity responseContent = response.getEntity();
      json = JSONObject.fromObject(EntityUtils.toString(responseContent));
    } catch (Exception e) {
      // e.printStackTrace();
    } finally {
      try {
        if (response != null) {
          response.close();
        }
      } catch (IOException e) {
        // e.printStackTrace();
      }
    }
    return json;
  }
}