在SpringBoot中定义和读取自定义配置的方法步骤

app:
  custom:
    my-property: value

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
 
@Configuration
@ConfigurationProperties(prefix = "app.custom")
public class CustomProperties {
 
    private String myProperty;
 
    public String getMyProperty() {
        return myProperty;
    }
 
    public void setMyProperty(String myProperty) {
        this.myProperty = myProperty;
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
@Component
public class MyComponent {
 
    private final CustomProperties customProperties;
 
    @Autowired
    public MyComponent(CustomProperties customProperties) {
        this.customProperties = customProperties;
    }
 
    public void printCustomProperty() {
        System.out.println(customProperties.getMyProperty());
    }
}

# application.properties
myapp.name=Spring Boot Application
myapp.description=This is a demo application for custom configuration
myapp.server.port=8081

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
 
@Configuration
@ConfigurationProperties(prefix = "myapp")
public class MyAppConfig {
 
    private String name;
    private String description;
    private int serverPort;
 
    // 标准的getter和setter方法
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getDescription() {
        return description;
    }
 
    public void setDescription(String description) {
        this.description = description;
    }
 
    public int getServerPort() {
        return serverPort;
    }
 
    public void setServerPort(int serverPort) {
        this.serverPort = serverPort;
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class MyAppConfigController {
 
    private final MyAppConfig myAppConfig;
 
    @Autowired
    public MyAppConfigController(MyAppConfig myAppConfig) {
        this.myAppConfig = myAppConfig;
    }
 
    @GetMapping("/config")
    public String getConfig() {
        return "Name: " + myAppConfig.getName() + ", Description: " + myAppConfig.getDescription() + ", Server Port: " + myAppConfig.getServerPort();
    }
}