Java Integration with REST APIs
Java Developer Presentation
What is an API?
• Application Programming Interface
• Allows communication between software
components
• REST APIs are HTTP-based APIs
REST Principles
• Stateless, Cacheable, Client-Server
architecture
• Methods: GET, POST, PUT, DELETE
• Resources identified by URIs
Java HTTP Clients
• HttpURLConnection (oldest)
• Apache HttpClient (robust, flexible)
• HttpClient from Java 11 (modern)
Consuming REST APIs
• Sending requests and reading responses
• Setting headers, parameters
• Handling HTTP status codes
JSON Parsing in Java
• Using Jackson: ObjectMapper class
• Using Gson: Gson class
• Mapping JSON to Java objects (POJOs)
Error Handling
• Handling HTTP errors gracefully
• Timeouts, IOExceptions
• Retry logic and logging

Java_Integration_with_REST_APIs.Java_Integration_with_REST_APIspptx

  • 1.
    Java Integration withREST APIs Java Developer Presentation
  • 2.
    What is anAPI? • Application Programming Interface • Allows communication between software components • REST APIs are HTTP-based APIs
  • 3.
    REST Principles • Stateless,Cacheable, Client-Server architecture • Methods: GET, POST, PUT, DELETE • Resources identified by URIs
  • 4.
    Java HTTP Clients •HttpURLConnection (oldest) • Apache HttpClient (robust, flexible) • HttpClient from Java 11 (modern)
  • 5.
    Consuming REST APIs •Sending requests and reading responses • Setting headers, parameters • Handling HTTP status codes
  • 6.
    JSON Parsing inJava • Using Jackson: ObjectMapper class • Using Gson: Gson class • Mapping JSON to Java objects (POJOs)
  • 7.
    Error Handling • HandlingHTTP errors gracefully • Timeouts, IOExceptions • Retry logic and logging