httpclient发请求
第一中实现:
1、创建mavern项目并在pom.xml中添加依赖
2、get请求
import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import java.io.IOException;public class HttpGetNovars { public static void main(String[] args) throws IOException { String url = "https://www.baidu.com/"; HttpGet get = new HttpGet(url); CloseableHttpClient hc = HttpClients.createDefault(); CloseableHttpResponse response = hc.execute(get); HttpEntity responseEntity = response.getEntity(); String responseBody = EntityUtils.toString(responseEntity); System.out.println(responseBody); }}
第二种实现
1、导入依赖
2、get请求
import org.apache.hc.client5.http.classic.methods.HttpGet;import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;import org.apache.hc.client5.http.impl.classic.HttpClients;import org.apache.hc.core5.http.Header;import org.apache.hc.core5.http.ParseException;import org.apache.hc.core5.http.io.entity.EntityUtils;import java.io.IOException;public class httpClientDemo1 { public static void main(String[] args) throws IOException, ParseException { String url = "https://www.baidu.com/"; HttpGet get = new HttpGet(url); CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = httpClient.execute(get); int code = response.getCode(); System.out.println(code); String responseString = EntityUtils.toString(response.getEntity()); System.out.println(responseString); Header[] headers = response.getHeaders(); for (Header header:headers){ System.out.println(header.getName()); System.out.println(header.getValue()); } }}