springboot 自动配置@ConfigurationProperties

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本文介绍如何在Spring Boot中使用@ConfigurationProperties注解进行属性注入，包括将注解应用于@Bean方法和类级别，以及通过单元测试验证配置的有效性。

1.加在@Bean

package com.knife.EhcacheBoot;

public class ServiceA {

	private String id;
	private String name;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String toString(){
		return "[id:"+id+",name:"+name+"]";
	}
}

package com.knife.EhcacheBoot;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class Config {

	@Bean
	@ConfigurationProperties(prefix = "service")
	public ServiceA createServiceA() {
		return new ServiceA();
	}

}

配置文件

service.id=001
service.name=test

测试

package com.knife.EhcacheBoot;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = App.class)//这里的App是springboot的启动类名
@WebAppConfiguration
public class UnitTest {

	
	@Autowired
	ServiceA sa;
	
	@Test
	public void test(){
		System.out.println(sa);
	}
}

结果

[id:001,name:test]

2.加在class上

package com.knife.EhcacheBoot;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "service")
public class ServiceA {

	private String id;
	private String name;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String toString(){
		return "[id:"+id+",name:"+name+"]";
	}
}

package com.knife.EhcacheBoot;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class Config {

	@Bean
	public ServiceA createServiceA() {
		return new ServiceA();
	}

}