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Spring 5.0 Projects

You're reading from   Spring 5.0 Projects Build seven web development projects with Spring MVC, Angular 6, JHipster, WebFlux, and Spring Boot 2

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Product type Paperback
Published in Feb 2019
Publisher Packt
ISBN-13 9781788390415
Length 442 pages
Edition 1st Edition
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Author (1):
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Nilang Patel Nilang Patel
Author Profile Icon Nilang Patel
Nilang Patel
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Table of Contents (9) Chapters Close

Preface 1. Creating an Application to List World Countries with their GDP FREE CHAPTER 2. Building a Reactive Web Application 3. Blogpress - A Simple Blog Management System 4. Building a Central Authentication Server 5. An Application to View Countries and their GDP using JHipster 6. Creating an Online Bookstore 7. Task Management System Using Spring and Kotlin 8. Other Books You May Enjoy

Understanding the World Bank API

There are a lot of APIs exposed by the World Bank (http://www.worldbank.org/) and the API documentation can be found here (https://datahelpdesk.worldbank.org/knowledgebase/articles/889386-developer-information-overview). Out of the available APIs, we will use the Indicator APIs (https://datahelpdesk.worldbank.org/knowledgebase/articles/898599-api-indicator-queries), which represent information such as total population, GDP, GNI, energy use, and much more.

Using the Indicator API, we will fetch the GDP information for the countries available in the database for the last 10 years. Let's look at the API's REST URL and the data returned by the API, as follows:

GET http://api.worldbank.org/countries/BR/indicators/NY.GDP.MKTP.CD?format=json&date=2007:2017

The BR is a country code (Brazil) in this URL. The NY.GDP.MKTP.CD is the flag used by the Word Bank API internally to call Indicator API. The request parameter, date, indicates the duration of which the GDP information is required.

The excerpt from the response you will get for the preceding API is as follows:

[
{
"page": 1,
"pages": 1,
"per_page": "50",
"total": 11
},
[
....// Other country data
{
"indicator": {
"id": "NY.GDP.MKTP.CD",
"value": "GDP (current US$)"
},
"country": {
"id": "BR",
"value": "Brazil"
},
"value": "1796186586414.45",
"decimal": "0",
"date": "2016"
}
]
]

The preceding response shows the GDP indicator in US$ for Brazil for the year 2016. 

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Spring 5.0 Projects
Published in: Feb 2019
Publisher: Packt
ISBN-13: 9781788390415
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