TheAlanWang

Notes

01_simple endpoint

1 min read

  1. Create a new package controller
  2. Create a endpointer
  3. Set application.properties

next step: set docker file

Create a new package controller under src/main/java/com/cs6650/helloservice/ and add HelloController.java:

PostMapping

package com.example.cs6650_assignment.controller;
 
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import lombok.extern.slf4j.Slf4j;
 
@Slf4j  // Lombok annotation for logging
@RestController  // Combines @Controller and @ResponseBody
@RequestMapping("/echo")  // Base path for all endpoints in this controller
public class EchoController {
 
  @PostMapping  // Maps HTTP POST requests to /hello
  public ResponseEntity<String> echo(@RequestBody String input) {
    log.info("Echo called with: {}", input);
    return ResponseEntity.ok(input);
  }
}
curl -X POST http://localhost:8080/echo -d "hello"
  • curl一个命令行 HTTP 客户端，相当于 终端版 Postman
  • -X POST 指定 HTTP 方法为 POST, 如果不写 -X POST，curl 默认是 GET
  • http://localhost:8080/echo 你访问的 URL，也就是你的 Spring Boot 接口地址
  • -d "bye" -d = data = request body

Step3 set application.properties

# Server configuration
server.port=8080
server.servlet.context-path=/api
 
# Logging configuration
logging.level.com.cs6650.helloservice=DEBUG
logging.pattern.console=%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
 
# Application info (useful for monitoring)
spring.application.name=cs6650_assignment

test

curl -X POST http://localhost:8080/api/echo -d "hello"
hello=%

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