HttpClientUtil工具类封装-优快云博客

本文介绍了一个基于Apache HttpClient的Java工具类实现，包括GET和POST请求的封装，展示了如何设置请求参数、请求头以及处理响应结果。适用于网络请求场景。

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package com.jd.ng.shiro.utils;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**

@Author: husToy.Wang
@Date: 2019/8/5 9:38

@Version 1.0
*/
public class HttpClientUtil {

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

/**

封装 doGet方法，执行
@param url
@return
*/
public static String doGet(String url) {

CloseableHttpClient httpClient = HttpClients.createDefault();

HttpGet httpGet = new HttpGet(url);
/**
- 设置请求头
  */
  //httpGet.setHeader(new BasicHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8"));
CloseableHttpResponse response = null;

try {
response = httpClient.execute(httpGet);
```
 if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
     HttpEntity entity = response.getEntity();

     String result = EntityUtils.toString(entity, "UTF-8");

     EntityUtils.consume(entity);

     httpClient.close();

     return result;
 }
 httpClient.close();
```
} catch (IOException e) {
logger.error("httpClient.doGet.error:{}", e.getMessage());
return null;
}

return null;
}

/**

封装 post请求

@return
*/
public static String doPost(String url) throws IOException {
String result = null;

CloseableHttpClient httpClient = HttpClients.createDefault();

CloseableHttpResponse response = null;

try {

 HttpPost httpPost = new HttpPost(url);

 // 定义请求的配置
 RequestConfig config = RequestConfig.custom().setSocketTimeout(20000).setConnectTimeout(2000).build();
 httpPost.setConfig(config);


 List<NameValuePair> parameters = new ArrayList<NameValuePair>(0);
 parameters.add(new BasicNameValuePair("scope", "project"));
 parameters.add(new BasicNameValuePair("q", "java"));

 // 提交参数发送请求
 UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(parameters);

 // 请求中设置请求体
 httpPost.setEntity(urlEncodedFormEntity);


 // 如果需要，设置请求头,多个请求头
 //Header[] headers = {new BasicHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8")};
 //httpPost.setHeaders(headers);


 response = httpClient.execute(httpPost);

 HttpEntity entity = response.getEntity();

 if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

     result = EntityUtils.toString(entity, "UTF-8");

     EntityUtils.consume(entity);
     httpClient.close();
     return result;
 }

} catch (Exception e) {
logger.error("httpClient.doPost.error:{}", e.getMessage());
return null;
}

return null;
}

}

转载于:https://www.cnblogs.com/leigepython/p/11301448.html