package com.example.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.stereotype.Component;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
// Laptop Bean
@Component
class Laptop {
private HardDisk hardDisk;
private Battery battery;
@Autowired
public Laptop(HardDisk hardDisk, Battery battery) {
this.hardDisk = hardDisk;
this.battery = battery;
}
public HardDisk getHardDisk() {
return hardDisk;
}
public Battery getBattery() {
return battery;
}
}
// HardDisk Bean
@Component
class HardDisk {
public String readData() {
return "Reading data from hard disk...";
}
}
// Battery Bean
@Component
class Battery {
public String checkChargeLevel() {
return "Battery charge level: 75%";
}
}
// Controller
@RestController
class MyController {
@Autowired
private Laptop laptop;
@GetMapping
public String test() {
StringBuilder output = new StringBuilder();
output.append("Laptop powered on.<br>");
output.append(laptop.getHardDisk().readData()).append("<br>");
output.append(laptop.getBattery().checkChargeLevel()).append("<br>");
return output.toString();
}
}
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