HttpClient

• Maven：

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<!--https://github.com/apache/httpcomponents-client--> <dependency>         <groupId>org.apache.httpcomponents.core5</groupId>         <artifactId>httpcore5</artifactId>         <version>5.0.4</version> </dependency> <dependency>         <groupId>org.apache.httpcomponents.client5</groupId>         <artifactId>httpclient5</artifactId>         <version>5.0.4</version> </dependency>

• Get，Post的封装：HttpClientUtil

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import org.apache.hc.client5.http.ClientProtocolException; import org.apache.hc.client5.http.classic.methods.HttpGet; import org.apache.hc.client5.http.classic.methods.HttpPost; import org.apache.hc.client5.http.impl.classic.CloseableHttpClient; import org.apache.hc.client5.http.impl.classic.HttpClients; import org.apache.hc.core5.http.ClassicHttpResponse; import org.apache.hc.core5.http.HttpEntity; import org.apache.hc.core5.http.HttpStatus; import org.apache.hc.core5.http.ParseException; import org.apache.hc.core5.http.io.HttpClientResponseHandler; import org.apache.hc.core5.http.io.entity.EntityUtils; import org.apache.hc.core5.http.io.entity.StringEntity;   import java.io.IOException; import java.net.URISyntaxException; import java.nio.charset.Charset;   public class HttpClientUtil {       public static String doGet(String url){         try {             final CloseableHttpClient httpclient = HttpClients.createDefault();             //final HttpGet httpget = new HttpGet("https://api.doctorxiong.club/v1/fund/detail?code=000001&startDate=2020-09-01");             final HttpGet httpget = new HttpGet(url);               System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());               final HttpClientResponseHandler<String> responseHandler = new HttpClientResponseHandler<String>() {                 @Override                 public String handleResponse(                         final ClassicHttpResponse response) throws IOException {                     final int status = response.getCode();                     if (status >= HttpStatus.SC_SUCCESS && status < HttpStatus.SC_REDIRECTION) {                         final HttpEntity entity = response.getEntity();                         try {                             return entity != null ? EntityUtils.toString(entity) : null;                         } catch (final ParseException ex) {                             throw new ClientProtocolException(ex);                         }                     } else {                         throw new ClientProtocolException("Unexpected response status: " + status);                     }                 }               };               final String responseBody = httpclient.execute(httpget, responseHandler);               return responseBody;         } catch (URISyntaxException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         }         return null;     }       public static String doPost(String url,String params){         try {             final CloseableHttpClient httpclient = HttpClients.createDefault();               final HttpPost httppost = new HttpPost(url);               StringEntity entiry = new StringEntity(params, Charset.forName("utf-8"));             httppost.setEntity(entiry);               httppost.setHeader("Content-Type","application/json");               System.out.println("Executing request " + httppost.getMethod() + " " + httppost.getUri());               final HttpClientResponseHandler<String> responseHandler = new HttpClientResponseHandler<String>() {                 @Override                 public String handleResponse(                         final ClassicHttpResponse response) throws IOException {                     final int status = response.getCode();                     if (status >= HttpStatus.SC_SUCCESS && status < HttpStatus.SC_REDIRECTION) {                         final HttpEntity entity = response.getEntity();                         try {                             return entity != null ? EntityUtils.toString(entity) : null;                         } catch (final ParseException ex) {                             throw new ClientProtocolException(ex);                         }                     } else {                         throw new ClientProtocolException("Unexpected response status: " + status);                     }                 }               };               final String responseBody = httpclient.execute(httppost, responseHandler);               return responseBody;         } catch (URISyntaxException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         }         return null;     }   }

• 测试用例

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String responseBody = HttpClientUtil.doGet("https://api.doctorxiong.club/v1/fund/detail?code=000001&startDate=2020-09-01");   if(responseBody != null){       JSONObject json = JSONObject.parseObject(responseBody);       if("200".equals(json.getString("code"))){            System.out.println("第三方返回：" + json.getString("data"));       } }

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JSONObject jsonObject = new JSONObject(); jsonObject.put("fundType",Arrays.asList("zs")); jsonObject.put("sort","z"); jsonObject.put("fundCompany",Arrays.asList("80000248")); jsonObject.put("pageIndex",1); jsonObject.put("pageSize",1); String responseBody = HttpClientUtil.doPost("https://api.doctorxiong.club/v1/fund/rank",JSONObject.toJSONString(jsonObject));   if(responseBody != null){      JSONObject json = JSONObject.parseObject(responseBody);      if("200".equals(json.getString("code"))){            System.out.println("第三方返回：" + json.getString("data"));      } }

参考文档：http://hc.apache.org/httpcomponents-client-5.1.x/quickstart.html

GitHub：https://github.com/apache/httpcomponents-client