https://github.com/davenaugler/unit_14_restjson

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https://github.com/davenaugler/unit_14_restjson

jackson-databind java maven spring-boot

Last synced: about 2 months ago
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This is a description

• Host: GitHub
• URL: https://github.com/davenaugler/unit_14_restjson
• Owner: davenaugler
• License: mit
• Created: 2024-01-02T22:53:15.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2024-01-17T20:46:16.000Z (12 months ago)
• Last Synced: 2024-01-19T00:41:23.834Z (12 months ago)
• Topics: jackson-databind, java, maven, spring-boot
• Language: Java
• Homepage:
• Size: 84 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Unit_14-Rest-JSON

## 01 - JSON

- Created `JsonExample.java` and broke down how JSON looks and how it is structured.

- JSON is based on Key Value pairs

- Objects are represented by curly brackets `{}`

- Arrays are represented by square brackets `[]`

## 02 - Converting JSON Strings to Java and Back

- Downloading someone else's code. In this case it's within our Spring-Boot Maven project (Jackson databind).

- Task: Take a Java Object and convert it into a JSON String and then visa versa

   - Used [Jackson databind](https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind) to perform the local lifecycle of a JSON String, modify the JSON, and ouput the JSON String

## 03 - Sending Data to Java via Post Request

- Learned to pass data from a web request, using Postman

- Put `@RequestParam`'s within the `createPerson` class.

   - Made `gender` optional by adding `@RequestParam(required = false)`

- Status: 200 OK

- Doing it this way we sent `name`, `age`, and `gender` via Query Params through the ULR

- Doing this exposes our data

  - **Pros:** Quick and easy, stateless, and there's no need for session management

  - **Cons:** Security risks, data size limitations, caching issues, and unpleasant user experience 

## 04 - Omitting RequestParam Annotation

- Removed the `@RequestParam` annotations within the `createPerson` class

- Class still successfully runs and returns us our object as it did before within the URL

- Feature of doing it this way is that you can not specify required fields.

   - Doing it this way, none of the fields within the `createPerson` class are required. 

   - So if you leave out `age` it's totally fine and returns `age` as null

- Status: 200 OK

## 05 - Request Header and Body

- Learning the difference between sending data via URL and sending data within the Body of the request via POST 

  - GET Request: Getting data from the server to HTML

  - POST Request: Sending data from HTML to the server (using the Body of the Post request to send the data)

## 06 - Path Variables

- Sending path variables through GET request using Postman

## 07 - Mocking a Repository

- Come back to

## 08 - Rest Calls with Spring

- Went to [Alpha Vantage](https://www.alphavantage.co/) to play with their free API Key

- Reviewed their documentation

## 09 - Mapping JSON Response to Java Objects