Java发送Http请求:HttpClientUtils 2017-10-10 JavaBase Http, JavaUtils 添加依赖 12345<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.2</version></dependency> 导入包 1234567891011121314151617181920import java.io.IOException;import java.io.Serializable;import java.net.URI;import java.util.ArrayList;import java.util.List;import java.util.Map;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; 核心代码 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171/** * ClassName: HttpClientUtil.java * FUNCTION: * @author: zili * @version: * @Date: Oct 9, 2017 */public class HttpClientUtils { private final static Integer DEFAULT_TIMEOUT = 10000; public static HttpResponse doGet(String url, Map<String, String> param, Integer timeout) { // 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault(); HttpResponse httpResponse = null; 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); if(timeout != null && timeout > 0){ RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeout) .setConnectTimeout(timeout) .setConnectionRequestTimeout(timeout) .build(); httpGet.setConfig(requestConfig); } // 执行请求 response = httpclient.execute(httpGet); httpResponse = new HttpResponse(); httpResponse.setResponseCode(response.getStatusLine().getStatusCode()); if(response.getStatusLine().getStatusCode() == 200){ httpResponse.setResponseData(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 httpResponse; } public static HttpResponse doGet(String url) { return doGet(url, null, DEFAULT_TIMEOUT); } public static HttpResponse doPost(String url, Map<String, String> param, Integer timeout) { // 创建Httpclient对象 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; HttpResponse httpResponse = 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<>(); for (String key : param.keySet()) { paramList.add(new BasicNameValuePair(key, param.get(key))); } // 模拟表单 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8"); httpPost.setEntity(entity); } if(timeout != null && timeout > 0){ RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeout) .setConnectTimeout(timeout) .setConnectionRequestTimeout(timeout) .build(); httpPost.setConfig(requestConfig); } // 执行http请求 response = httpClient.execute(httpPost); httpResponse = new HttpResponse(); httpResponse.setResponseCode(response.getStatusLine().getStatusCode()); if(response.getStatusLine().getStatusCode() == 200){ httpResponse.setResponseData(EntityUtils.toString(response.getEntity(), "UTF-8")); } } catch (Exception e) { e.printStackTrace(); } finally { try { response.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return httpResponse; } public static HttpResponse doPost(String url) { return doPost(url, null, DEFAULT_TIMEOUT); } public static HttpResponse doPostJson(String url, String json, Integer timeout) { // 创建Httpclient对象 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; HttpResponse httpResponse = null; 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); if(timeout != null && timeout > 0){ RequestConfig requestConfig = RequestConfig.custom() .setSocketTimeout(timeout) .setConnectTimeout(timeout) .setConnectionRequestTimeout(timeout) .build(); httpPost.setConfig(requestConfig); } httpPost.setEntity(entity); // 执行http请求 response = httpClient.execute(httpPost); httpResponse = new HttpResponse(); httpResponse.setResponseCode(response.getStatusLine().getStatusCode()); if(response.getStatusLine().getStatusCode() == 200){ httpResponse.setResponseData(EntityUtils.toString(response.getEntity(), "UTF-8")); } } catch (Exception e) { e.printStackTrace(); } finally { try { response.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return httpResponse; } public static class HttpResponse implements Serializable{ /** * */ private static final long serialVersionUID = -2033460329795125474L; private Integer responseCode; private String responseData; // 省略getter setter } } 上一篇 Spring Data JPA中的nativeQuery和pageable 下一篇 让centos7中的docker飞过墙