•application.properties

•application.yml

person.last-name=\u674E\u56DB
person.age=12
person.birth=2017/12/15
person.boss=false
person.maps.k1=v1
person.maps.k2=14
person.lists=a,b,c
person.dog.name=dog
person.dog.age=15

1 通過@ConfigurationPropertie注入 :該注入適用於全域性application.properties , @ConfigurationProperties：告訴SpringBoot將本類中的所有屬性和配置檔案中相關的配置進行繫結

@Component
@ConfigurationProperties(prefix = "person")
//@Validated
public class Person {

    private String lastName;
    private Integer age;
    private Boolean boss;
    private Date birth;
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;

    // Set Get methods 
}
 

2 通過@Value注入 ,該注入適用於全域性application.properties

@Component
//@ConfigurationProperties(prefix = "person")
//@Validated
public class Person {
	
    @Value("${person.lastName}")
    private String lastName;
    
    @Value("${person.age}")
    private Integer age;
    
    @Value("true}")
    private Boolean boss;
    
    @Value("${person.birth}")
    private Date birth;
    
    @Value("${person.maps}")
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;

    // Set Get methods 
}
 

3 通過 @PropertySource(value = {“classpath:person.properties”}) 該注入適用於非區域性自定義屬性值的配置

@PropertySource(value = {"classpath:person.properties"})
@Component
@ConfigurationProperties(prefix = "person")
public class Person {

    private String lastName;
    private Integer age;
    private Boolean boss;
    private Date birth;
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;

}

如果屬性的key value配置是在spring XML配置檔案中，則可以用以下方法獲取

Bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="helloService" class="com.atguigu.springboot.service.HelloService"></bean>
</beans>

4 通過@ImportResource(locations = {“classpath:beans.xml”})

@ImportResource：匯入Spring的配置檔案，讓配置檔案裡面的內容生效； Spring Boot裡面沒有Spring的配置檔案，我們自己編寫的配置檔案，也不能自動識別； 想讓Spring的配置檔案生效，必須載入進來；@ImportResource標註在一個配置類上

@ImportResource(locations = {"classpath:beans.xml"})
@SpringBootApplication
public class SpringBoot02ConfigApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBoot02ConfigApplication.class, args);
	}
}

import com.atguigu.springboot.bean.Person;
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.context.ApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBoot02ConfigApplicationTests {

	@Autowired
	Person person;

	@Autowired
	ApplicationContext ioc;

	@Test
	public void testHelloService(){
		Object hellobean = ioc.getBean("helloService02");
		boolean b = ioc.containsBean("helloService02");
		System.out.println(hellobean);
	}
} 

5 通過註解的方式類@Configuration 獲取spring配置的內容

SpringBoot推薦給容器中新增元件的方式；推薦使用全註解的方式

1、配置類@Configuration 替代 Spring配置檔案

2、使用@Bean給容器中新增元件

package com.atguigu.springboot.config;


import com.atguigu.springboot.service.HelloService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @Configuration：指明當前類是一個配置類；就是來替代之前的Spring配置檔案
 *
 * 在配置檔案中用<bean><bean/>標籤新增元件
 *
 */
@Configuration
public class MyAppConfig {

    //將方法的返回值新增到容器中；容器中這個元件預設的id就是方法名
    @Bean
    public HelloService helloServiceHere(){
        System.out.println("配置類@Bean給容器中新增元件了...");
        return new HelloService();
    }
}

注意：要獲取的bean的名字，必須跟@Configuration檔案中標註為@Bean所獲取的物件的方法名一致，即 ”helloServiceHere“

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBoot02ConfigApplicationTests {

	@Autowired
	Person person;

	@Autowired
	ApplicationContext ioc;

	@Test
	public void testHelloService(){
		Object hellobean = ioc.getBean("helloServiceHere");
		System.out.println(hellobean);
	}
}