HttpClient实现HTTP请求
【摘要】 1:开发环境
JDK1.8、Springboot
1
2:项目依赖
"org.apache.httpcomponents:httpclient:4.5.10"
1
3:代码详细
package com.nobody.utils;
import java.net.URI;
import java.net.URLEncoder;
import java.util...
1:开发环境
JDK1.8、Springboot
- 1
2:项目依赖
"org.apache.httpcomponents:httpclient:4.5.10"
- 1
3:代码详细
package com.nobody.utils;
import java.net.URI;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
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.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
public class HttpClientUtil { private static final Logger LOGGER = LoggerFactory.getLogger(HttpClientUtil.class); private static final String STANDARD_CHARSET = "UTF-8"; /** * GET 若有参则直接拼接URL * * @param headers 请求头参数 * @param params 请求参数 * @param url 请求地址 * @param timeOutInMillis 超时时间(毫秒) * @return */ public static String doGet(Map<String, Object> headers, Map<String, Object> params, String url, int timeOutInMillis) { // 返回结果 String result = null; // 创建Http客户端 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); // 创建Get请求 HttpGet httpGet = null; try { // 请求参数处理(拼接前先将请求参数值encoding,处理一些特殊字符) if (!CollectionUtils.isEmpty(params)) { StringBuffer sb = new StringBuffer(); for (String key : params.keySet()) { sb.append(key).append("=") .append(URLEncoder.encode(params.get(key).toString(), STANDARD_CHARSET)) .append("&"); } String handledParams = sb.substring(0, sb.length() - 1).toString(); httpGet = new HttpGet(url + "?" + handledParams); } else { httpGet = new HttpGet(url); } // 请求头处理 if (!CollectionUtils.isEmpty(headers)) { Set<String> set = headers.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String key = it.next(); if (null != headers.get(key)) { httpGet.addHeader(key, headers.get(key).toString()); } } } // 设置数据读取超时时间,传输超时时间,链接请求超时时间 if (timeOutInMillis > 0) { RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeOutInMillis).setConnectTimeout(timeOutInMillis) .setConnectionRequestTimeout(timeOutInMillis).build(); httpGet.setConfig(requestConfig); } // 客户端发送请求并获得响应模型 CloseableHttpResponse response = httpClient.execute(httpGet); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); if (null != responseEntity) { result = EntityUtils.toString(responseEntity, STANDARD_CHARSET); } } catch ( Exception ex) { LOGGER.error("doGet error:", ex); } finally { // 释放资源 httpGet.abort(); if (null != httpClient) { try { httpClient.close(); } catch (Exception ex) { LOGGER.error("doGet httpClient close error:", ex); } } } return result; } /** * GET 若有参形式(使用URI获得HttpGet) * * @param headers 请求头参数 * @param params 请求参数 * @param scheme 请求协议 * @param host 请求IP * @param port 请求端口 * @param path 请求路径 * @param timeOutInMillis 超时时间(毫秒) * @return */ public static String doGet(Map<String, Object> headers, Map<String, Object> params, final String scheme, final String host, final int port, final String path, int timeOutInMillis) { // 返回结果 String result = null; // 创建Http客户端 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); // 创建Get请求 HttpGet httpGet = null; try { URI uri = null; URIBuilder ub = new URIBuilder().setScheme(scheme).setHost(host).setPort(port).setPath(path); // 请求参数处理 if (!CollectionUtils.isEmpty(params)) { List<NameValuePair> nvps = new ArrayList<>(); for (String key : params.keySet()) { nvps.add(new BasicNameValuePair(key, params.get(key).toString())); } ub.setParameters(nvps); } uri = ub.build(); httpGet = new HttpGet(uri); if (!CollectionUtils.isEmpty(headers)) { Set<String> set = headers.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String key = it.next(); if (null != headers.get(key)) { httpGet.addHeader(key, headers.get(key).toString()); } } } // 设置数据读取超时时间,传输超时时间,链接请求超时时间 if (timeOutInMillis > 0) { RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeOutInMillis).setConnectTimeout(timeOutInMillis) .setConnectionRequestTimeout(timeOutInMillis).build(); httpGet.setConfig(requestConfig); } // 客户端发送请求并获得响应模型 CloseableHttpResponse response = httpClient.execute(httpGet); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); if (null != responseEntity) { result = EntityUtils.toString(responseEntity, STANDARD_CHARSET); } } catch (Exception ex) { LOGGER.error("doGet error:", ex); } finally { // 释放资源 httpGet.abort(); if (null != httpClient) { try { httpClient.close(); } catch (Exception ex) { LOGGER.error("doGet httpClient close error:", ex); } } } return result; } /** * POST application/x-www-form-urlencoded形式 * * @param headers 请求头参数 * @param params 请求参数 * @param url 请求地址 * @param timeOutInMillis 超时时间(毫秒) * @return */ public static String doPost(String url, Map<String, Object> headers, Map<String, Object> params, int timeOutInMillis) { // 返回结果 String result = null; // 创建Http客户端 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); // 创建Get请求 HttpPost httpPost = null; try { // 请求参数处理(拼接前先将请求参数值encoding,处理一些特殊字符) if (!CollectionUtils.isEmpty(params)) { StringBuffer sb = new StringBuffer(); for (String key : params.keySet()) { sb.append(key).append("=") .append(URLEncoder.encode(params.get(key).toString(), STANDARD_CHARSET)) .append("&"); } String handledParams = sb.substring(0, sb.length() - 1).toString(); httpPost = new HttpPost(url + "?" + handledParams); } else { httpPost = new HttpPost(url); } // 请求头处理 if (!CollectionUtils.isEmpty(headers)) { Set<String> set = headers.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String key = it.next(); if (null != headers.get(key)) { httpPost.addHeader(key, headers.get(key).toString()); } } } // 设置数据读取超时时间,传输超时时间,链接请求超时时间 if (timeOutInMillis > 0) { RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeOutInMillis).setConnectTimeout(timeOutInMillis) .setConnectionRequestTimeout(timeOutInMillis).build(); httpPost.setConfig(requestConfig); } // 客户端发送请求并获得响应模型 CloseableHttpResponse response = httpClient.execute(httpPost); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); if (null != responseEntity) { result = EntityUtils.toString(responseEntity, STANDARD_CHARSET); } } catch (Exception ex) { LOGGER.error("doPost error:", ex); } finally { // 释放资源 httpPost.abort(); if (null != httpClient) { try { httpClient.close(); } catch (Exception ex) { LOGGER.error("doPost httpClient close error:", ex); } } } return result; } /** * POST application/x-www-form-urlencoded形式(NameValuePair参数形式) * * @param headers 请求头参数 * @param params 请求参数 * @param url 请求地址 * @param timeOutInMillis 超时时间(毫秒) * @return */ public static String doPostByNvp(String url, Map<String, Object> headers, Map<String, Object> params, int timeOutInMillis) { // 返回结果 String result = null; // 创建Http客户端 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); // 创建Get请求 HttpPost httpPost = null; try { httpPost = new HttpPost(url); // 请求参数处理 if (!CollectionUtils.isEmpty(params)) { List<NameValuePair> nvps = new ArrayList<>(); for (String key : params.keySet()) { nvps.add(new BasicNameValuePair(key, params.get(key).toString())); } httpPost.setEntity(new UrlEncodedFormEntity(nvps, STANDARD_CHARSET)); } // 请求头处理 if (!CollectionUtils.isEmpty(headers)) { Set<String> set = headers.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String key = it.next(); if (null != headers.get(key)) { httpPost.addHeader(key, headers.get(key).toString()); } } } // 设置数据读取超时时间,传输超时时间,链接请求超时时间 if (timeOutInMillis > 0) { RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeOutInMillis).setConnectTimeout(timeOutInMillis) .setConnectionRequestTimeout(timeOutInMillis).build(); httpPost.setConfig(requestConfig); } // 客户端发送请求并获得响应模型 CloseableHttpResponse response = httpClient.execute(httpPost); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); if (null != responseEntity) { result = EntityUtils.toString(responseEntity, STANDARD_CHARSET); } } catch (Exception ex) { LOGGER.error("doPost error:", ex); } finally { // 释放资源 httpPost.abort(); if (null != httpClient) { try { httpClient.close(); } catch (Exception ex) { LOGGER.error("doPost httpClient close error:", ex); } } } return result; } /** * POST application/json形式 * * @param headers 请求头参数 * @param jsonObject 请求对象参数 * @param url 请求地址 * @param timeOutInMillis 超时时间(毫秒) * @return */ public static String doPost(Map<String, Object> headers, String jsonObject, String url, int timeOutInMillis) { // 返回结果 String result = null; // 创建Http客户端 CloseableHttpClient httpClient = HttpClientBuilder.create().build(); // 创建Get请求 HttpPost httpPost = null; try { httpPost = new HttpPost(url); // 请求参数处理 if (!StringUtils.isEmpty(jsonObject)) { StringEntity entity = new StringEntity(jsonObject, STANDARD_CHARSET); httpPost.setEntity(entity); // httpPost.addHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType()); } // 请求头处理 if (!CollectionUtils.isEmpty(headers)) { Set<String> set = headers.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String key = it.next(); if (null != headers.get(key)) { httpPost.addHeader(key, headers.get(key).toString()); } } } // 设置数据读取超时时间,传输超时时间,链接请求超时时间 if (timeOutInMillis > 0) { RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeOutInMillis).setConnectTimeout(timeOutInMillis) .setConnectionRequestTimeout(timeOutInMillis).build(); httpPost.setConfig(requestConfig); } // 客户端发送请求并获得响应模型 CloseableHttpResponse response = httpClient.execute(httpPost); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); if (null != responseEntity) { result = EntityUtils.toString(responseEntity, STANDARD_CHARSET); } } catch (Exception ex) { LOGGER.error("doPost error:", ex); } finally { // 释放资源 httpPost.abort(); if (null != httpClient) { try { httpClient.close(); } catch (Exception ex) { LOGGER.error("doPost httpClient close error:", ex); } } } return result; }
}
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文章来源: javalib.blog.csdn.net,作者:陈皮的JavaLib,版权归原作者所有,如需转载,请联系作者。
原文链接:javalib.blog.csdn.net/article/details/103975057
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