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Java commons-httpclient如果實(shí)現(xiàn)get及post請(qǐng)求

更新時(shí)間：2020年09月17日 10:52:31 作者：賈樹(shù)丙

這篇文章主要介紹了Java commons-httpclient如果實(shí)現(xiàn)get及post請(qǐng)求,文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

PS：這個(gè)jar包，在2007年之后就沒(méi)有更新過(guò)了，是比較老的版本了。追求新的版本用HttpComponents 比較好

引入的jar包為：

<!-- https://mvnrepository.com/artifact/commons-httpclient/commons-httpclient -->
<dependency>
  <groupId>commons-httpclient</groupId>
  <artifactId>commons-httpclient</artifactId>
  <version>3.1</version>
</dependency>

具體實(shí)現(xiàn)類為：

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.commons.httpclient.methods.StringRequestEntity;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class HttpClientHelper {
  private static Logger logger = LoggerFactory.getLogger(HttpClientHelper.class);

  private HttpClientHelper() {

  }

  /**
   * 發(fā)起POST請(qǐng)求
   *
   * @param url    url
   * @param paramJson 參數(shù)的json格式
   */
  public static String sendPost(String url, String paramJson) {
    logger.info("開(kāi)始發(fā)起POST請(qǐng)求，請(qǐng)求地址為{}，參數(shù)為{}", url, paramJson);

    // 創(chuàng)建httpClient實(shí)例對(duì)象
    HttpClient httpClient = new HttpClient();
    // 設(shè)置httpClient連接主機(jī)服務(wù)器超時(shí)時(shí)間：15000毫秒
    httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);
    // 創(chuàng)建post請(qǐng)求方法實(shí)例對(duì)象
    PostMethod postMethod = new PostMethod(url);
    // 設(shè)置post請(qǐng)求超時(shí)時(shí)間
    postMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);
    postMethod.addRequestHeader("Content-Type", "application/json");
    try {
      //json格式的參數(shù)解析
      RequestEntity entity = new StringRequestEntity(paramJson, "application/json", "UTF-8");
      postMethod.setRequestEntity(entity);

      httpClient.executeMethod(postMethod);
      String result = postMethod.getResponseBodyAsString();
      postMethod.releaseConnection();
      return result;
    } catch (IOException e) {
      logger.error("POST請(qǐng)求發(fā)出失敗，請(qǐng)求的地址為{}，參數(shù)為{}，錯(cuò)誤信息為{}", url, paramJson, e.getMessage(), e);
    }
    return null;
  }

  /**
   * 發(fā)起GET請(qǐng)求
   *
   * @param urlParam url請(qǐng)求，包含參數(shù)
   */
  public static String sendGet(String urlParam) {
    logger.info("開(kāi)始發(fā)起GET請(qǐng)求，請(qǐng)求地址為{}", urlParam);
    // 創(chuàng)建httpClient實(shí)例對(duì)象
    HttpClient httpClient = new HttpClient();
    // 設(shè)置httpClient連接主機(jī)服務(wù)器超時(shí)時(shí)間：15000毫秒
    httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);
    // 創(chuàng)建GET請(qǐng)求方法實(shí)例對(duì)象
    GetMethod getMethod = new GetMethod(urlParam);
    // 設(shè)置post請(qǐng)求超時(shí)時(shí)間
    getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);
    getMethod.addRequestHeader("Content-Type", "application/json");
    try {
      httpClient.executeMethod(getMethod);
      String result = getMethod.getResponseBodyAsString();
      getMethod.releaseConnection();
      logger.info("返回信息為{}", result);
      return result;
    } catch (IOException e) {
      logger.error("GET請(qǐng)求發(fā)出失敗，請(qǐng)求的地址為{}，錯(cuò)誤信息為{}", urlParam, e.getMessage(), e);
    }
    return null;
  }

  public static void main(String[] args) {
    String url = "https://jiashubing.cn/tencenttest";
    String param = "{\"aaa\":\"bbbbbbb\"}";
    sendPost(url, param);
    String urlParam = "https://jiashubing.cn/talk/document?fileid=1234";
    sendGet(urlParam);
  }

}

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