Guides / Consuming Rest

REST Service

Run rest_service in a separate terminal on port 9090.
cd rest_service/
mvn spring-boot:run

http://localhost:9090 # Welcome! Use /quote/{id}
The client app will retrive quotes from the REST web service.
http://localhost:9090/getquote/1 # {"id":1,"content":"Spring Boot makes ...
http://localhost:9090/getquote/2 # {"id":2,"content":"With Boot you ...

Client App

Start a new Spring Boot Web project on port 8080


Application class with /request_quote mapping.
 * Consuming REST App
 * Add mapping (/getquote) from a separate service on 8080 port
 * Use a domain class (Quote) to contain the data that you need.
 * Any property not bound will be ignored.
 * RestTemplate will use the Jackson JSON library for incomming data.
 * CommandLineRunner will run the RestTemplate on startup.

package com.minte9.consuming_rest;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

public class App {

    public static void main(String[] args) {, args);

    public String home() {
        return "REST Api Client <br><br>Use /request_quote";

    public RestTemplate restTemplate(RestTemplateBuilder builder) {

    public Object quote() {
        RestTemplate rt = new RestTemplate(); // Browser

        Object quote = rt.getForObject(
            "http://localhost:9090/quote/1", Object.class
        return quote; // {"id":1,"content":"Spring Boot makes ...

    public CommandLineRunner run(RestTemplate restTemplate) // Console
        throws Exception {

            return args -> {
                Object quote = restTemplate.getForObject(
                    "http://localhost:9090/quote/2", Object.class

                System.out.println(quote); // {"id":2,"content":"With Boot ...

Test requests

Build and run the application in console or browser.
cd consuming_rest/
mvn spring-boot:run

# Browser
http://localhost:9090/getquote # {"id":1,"content":"Spring Boot makes ...

# Console
java -jar target/consuming_rest-0.0.1.jar # {"id":2,"content":"With Boot ...

Last update: 43 days ago