使用httpclient检测url状态及链接是否能打开
有时候我们需要检测某个url返回的状态码是不是200或者页面能不能正常打开响应可使用如下代码：
需要使用到的maven
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<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.5</version></dependency><dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> <version>4.4.14</version></dependency><dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version></dependency> |
代码：
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public static String checkUrlConnection(String url) { // 创建http POST请求 HttpGet httpGet = new HttpGet(url); httpGet.setHeader("Content-Type", "application/json"); RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(600)// 设置连接主机服务超时时间 .setConnectionRequestTimeout(1000)// 设置连接请求超时时间 .setSocketTimeout(1000)// 设置读取数据连接超时时间 .build(); // 为httpPost实例设置配置 httpGet.setConfig(requestConfig); // 设置请求头 CloseableHttpClient httpclient = null; CloseableHttpResponse response = null; int statusCode = 404; try { httpclient = HttpClients.createDefault();// 创建Httpclient对象 response = httpclient.execute(httpGet);// 执行请求 statusCode = response.getStatusLine().getStatusCode(); }catch (SocketException e) { return "404"; } catch (IOException e) { System.out.println("报错"); return "404"; } return String.valueOf(statusCode);} |
HTTPClient调用远程URL实例
案例描述
一次项目中后端服务需要从微信小程序获取扫码关注次数，网上搜各种示例都不太好用（代码冗余且效果不佳），于是自己花功夫做了一套。
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public interface CustomerAppointAPIService { String getApiToken(JSONObject json); JSONObject getFollowNum(JSONObject SaleId); void updateFacoriteCountRealitys();} |
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package com.faw.xxx.modules.staff.service.impl;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.StringEntity;import org.apache.http.util.EntityUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import com.faw.xxx.modules.staff.dao.DsCepStaffDAO;import com.faw.xxx.modules.staff.entity.DsCepStaff;import com.faw.xxx.modules.staff.service.CustomerAppointAPIService;import com.faw.xxx.utils.SSLClient;import cn.hutool.core.codec.Base64;@Servicepublic class CustomerAppointAPIServiceImpl implements CustomerAppointAPIService { @Autowired private DsCepStaffDAO dsCepStaffDAO; /** * 授权接口 * 参数格式： *{ * "Client":"digital_xxx",//客户端标识 * "Secret":"@-!xxx"//客户端接入秘钥 *} */ @Override public String getApiToken(JSONObject json) { HttpClient httpClient = null; HttpPost httpPost = null; String body = null; String postData = JSON.toJSONString(json); String encryptData=Base64.encode(postData); JSONObject params = new JSONObject(); params.put("request", encryptData); String url = "https://miniappxxx.xxx.com.cn/api/v1/APIToken/GetApiToken"; try{ httpClient = new SSLClient(); httpPost = new HttpPost(url); httpPost.addHeader("Content-type", "application/json; charset=utf-8");// httpPost.addHeader("Authorization", head); httpPost.setHeader("Accept", "application/json"); httpPost.setEntity(new StringEntity(params.toJSONString(), "UTF-8")); HttpResponse response = httpClient.execute(httpPost); if(response != null){ HttpEntity resEntity = response.getEntity(); if(resEntity != null){ body = EntityUtils.toString(resEntity,"utf-8"); } } }catch(Exception ex){ ex.printStackTrace(); } JSONObject result = JSON.parseObject(body); JSONObject msgData = result.getJSONObject("msg"); //接口直接返回token，以便于下一个接口调用 return msgData.get("Token").toString(); } /** * 微信小程序关注次数接口,POST请求 */ @Override public JSONObject getFollowNum(JSONObject SaleId) { HttpClient httpClient = null; HttpPost httpPost = null; String body = null; String postData = JSON.toJSONString(SaleId); String encryptData = Base64.encode(postData); JSONObject params = new JSONObject(); params.put("request", encryptData); String json = "{\"Client\":\"digital_xxx\",\"Secret\":\"@-!6xxx\"}"; String token = this.getApiToken(JSON.parseObject(json)); String url = "https://miniappxxx.xxx.com.cn/api/v2/WechatApi/xxxNum"; try{ httpClient = new SSLClient(); httpPost = new HttpPost(url); httpPost.addHeader("Content-type", "application/json; charset=utf-8"); httpPost.addHeader("Authorization", "bearer " + token); httpPost.setHeader("Accept", "application/json"); httpPost.setEntity(new StringEntity(params.toJSONString(), "UTF-8")); HttpResponse response = httpClient.execute(httpPost); if(response != null){ HttpEntity resEntity = response.getEntity(); if(resEntity != null){ body = EntityUtils.toString(resEntity,"utf-8"); } } }catch(Exception ex){ ex.printStackTrace(); } JSONObject result = JSON.parseObject(body); JSONObject resultData = new JSONObject(); resultData.put("code", result.get("code")); resultData.put("data", result.get("data")); return resultData; } //更新所有在职销售顾问实际被关注数，此接口涉及内部代码，不做详解 @Override @Transactional public void updateFacoriteCountRealitys() { //获取所有在职员工列表 List<DsCepStaff> dsCepStaffs = dsCepStaffDAO.getAllOnPost(); if (dsCepStaffs.size()>0) { for (DsCepStaff dsCepStaff : dsCepStaffs) { //更新销售顾问实际被关注数 JSONObject SaleId = new JSONObject(); SaleId.put("SaleId", dsCepStaff.getStaffId()); JSONObject resultData = this.getFollowNum(SaleId); if (resultData != null) { Integer facoriteCountReality = Integer.parseInt(resultData.get("data").toString()); dsCepStaffDAO.updateFacoriteCountRealityByStaffId(facoriteCountReality, dsCepStaff.getStaffId()); } } } } } |
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package com.faw.xxx.utils;import org.apache.http.conn.ClientConnectionManager;import org.apache.http.conn.scheme.Scheme;import org.apache.http.conn.scheme.SchemeRegistry;import org.apache.http.conn.ssl.SSLSocketFactory;import org.apache.http.impl.client.DefaultHttpClient;import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.X509TrustManager;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;/** * 用于进行Https请求的HttpClient * @author user * */public class SSLClient extends DefaultHttpClient { public SSLClient() throws Exception{ super(); SSLContext ctx = SSLContext.getInstance("TLS"); X509TrustManager tm = new X509TrustManager() { @Override public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public X509Certificate[] getAcceptedIssuers() { return null; } }; ctx.init(null, new TrustManager[]{tm}, null); SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER); ClientConnectionManager ccm = this.getConnectionManager(); SchemeRegistry sr = ccm.getSchemeRegistry(); sr.register(new Scheme("https", 443, ssf)); }} |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qq_33697094/article/details/119870749
