Here is the example code to execute simple Http POST request using Apache Http Client library.
we used:
Java 8, Eclipse IDE, Maven, Apache Http Client 4.5.7
Note: Here we have "reqres" publicly available api, you can use any REST api or use the api which you want to consume.
Project Folder Structure
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pom.xml
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we used:
Java 8, Eclipse IDE, Maven, Apache Http Client 4.5.7
Note: Here we have "reqres" publicly available api, you can use any REST api or use the api which you want to consume.
Project Folder Structure
-------------------------
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>javainspires</groupId> <artifactId>apachehttpclientexamples</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>apachehttpclientexamples</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.7</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> <version>4.4.11</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency> </dependencies> </project>
ConsumeResponseEntityDemo.java
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Output:
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package javainspires.apachehttpclientexamples; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; /** * * @author javainspires * */ public class ConsumeResponseEntityDemo { public static void main(String[] args) { try { // Http Get Request // create http client object HttpClient httpClient = HttpClients.createDefault(); // create http GET request HttpGet httpGetRequest = new HttpGet(); // set request URI to the created request object httpGetRequest.setURI(new URI("https://reqres.in/api/users/2")); // execute request using httpclient object HttpResponse httpResponse = httpClient.execute(httpGetRequest); // get Http Entity from response HttpEntity httpEntity = httpResponse.getEntity(); // check for null if (httpEntity != null) { // convert httpentity into string String responseBody = EntityUtils.toString(httpEntity); // print response body System.out.println("Response Body ::: \n" + responseBody); } } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
Output:
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Response Body ::: {"data":{"id":2,"first_name":"Janet","last_name":"Weaver","avatar":"https://s3.amazonaws.com/uifaces/faces/twitter/josephstein/128.jpg"}}