rest

Spring Boot – How to init a Bean for testing?

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In Spring Boot, we can create a @TestConfiguration class to initialize some beans for testing class only. P.S Tested with Spring Boot 2 1. @TestConfiguration + @Import This @TestConfiguration class will not pick up by the component scanning, we need to import it manually. TestConfig.java package com.mkyong; import org.springframework.boot.test.context.TestConfiguration; import org.springframework.boot.web.client.RestTemplateBuilder; import org.springframework.context.annotation.Bean; import java.time.Duration; …

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ElasticSearch Hello World Example

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ElasticSearch is an Open-source Enterprise REST based Real-time Search and Analytics Engine. It’s core Search Functionality is built using Apache Lucene, but supports many other features. It is written in Java Language. It supports Store, Index, Search and Analyze Data in Real-time. Like MongoDB, ElasticSearch is also a Document-based NoSQL Data Store. Note ElasticSearch website: …

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Spring REST API Validation

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In Spring MVC, just annotate a @Valid on the @RequestBody to fire the validation process. Note For complete source code, please refer to this – Spring Boot Ajax example P.S Tested with Spring Boot 1.5.1.RELEASE (Spring 4.3.6.RELEASE) 1. JSR 303 Validation Add JSR303 annotations on a bean. package com.mkyong.model; import org.hibernate.validator.constraints.NotBlank; public class SearchCriteria { …

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Spring Boot Ajax example

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This article will show you how to use jQuery.ajax to send a HTML form request to a Spring REST API and return a JSON response. Tools used : Spring Boot 1.5.1.RELEASE Spring 4.3.6.RELEASE Maven 3 jQuery Bootstrap 3 Note You may interest at this classic Spring MVC Ajax example 1. Project Structure A standard Maven …

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cURL – POST request examples

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Some cURL POST request examples for self reference. 1. Normal POST 1.1 To POST without data. $ curl -X POST http://localhost:8080/api/login/ 1.2 To POST with data. $ curl -d "username=mkyong&password=abc" http://localhost:8080/api/login/ 1.3 Spring REST to accept normal POST data. @PostMapping("/api/login") public ResponseEntity<?> login(@RequestParam("username") String username, @RequestParam("password") String password) { //… } @PostMapping("/api/login") public ResponseEntity<?> login(@ModelAttribute …

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cURL – Post JSON data to Spring REST

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This article shows you how to use cURL command to POST JSON data to a Spring REST API. 1. Spring REST A Simple Spring REST API to validate a login. LoginController.java package com.mkyong.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; @Controller public class LoginController { private final Logger …

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Spring Boot file upload example – Ajax and REST

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This article shows you how to upload files in Spring Boot web application (REST structure), using Ajax requests. Tools used in this article : Spring Boot 1.4.3.RELEASE Spring 4.3.5.RELEASE Thymeleaf jQuery (webjars) Maven Embedded Tomcat 8.5.6 Google Chrome Browser (Network Inspect) 1. Project Structure A standard Maven project structure. 2. Project Dependency Declares an extra …

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