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SpringBoot bean依賴屬性配置詳細(xì)介紹

更新時間：2022年09月26日 15:42:44 作者：搗蛋孩學(xué)編程

Spring容器是Spring的核心，一切SpringBean都存儲在Spring容器內(nèi)?？梢哉fbean是spring核心中的核心。Bean配置信息定義了Bean的實現(xiàn)及依賴關(guān)系，這篇文章主要介紹了SpringBoot bean依賴屬性配置

創(chuàng)建實體類

@Data
public class Cat {
    private String name;
    private Integer age;
}

@Data
public class Mouse {
    private String name;
    private Integer age;
}

配置文件application.yml使用固定格式為屬性注入數(shù)據(jù)

cartoon:
cat:
name: "圖多蓋洛"
age: 5
mouse:
name: "泰菲"
age: 6

業(yè)務(wù)類定義業(yè)務(wù)功能bean，在引導(dǎo)類通常使用@Import導(dǎo)入，解耦強制加載bean

使用@EnableConfigurationProperties注解設(shè)定使用屬性類時加載bean

@Data
//當(dāng)加載CartoonCatAndMouse類時將CartoonProperties類加載成bean，不用不加載，解耦合
@EnableConfigurationProperties(CartoonProperties.class)
public class CartoonCatAndMouse {
    private Cat cat;
    private Mouse mouse;
    private CartoonProperties cartoonProperties;
    public CartoonCatAndMouse(CartoonProperties cartoonProperties){
        this.cartoonProperties = cartoonProperties;
        cat = new Cat();
        cat.setName(cartoonProperties.getCat()!=null && StringUtils.hasText(cartoonProperties.getCat().getName()) ? cartoonProperties.getCat().getName() : "tom");
        cat.setAge(cartoonProperties.getCat()!=null && cartoonProperties.getCat().getAge()!=null ? cartoonProperties.getCat().getAge() : 3);
        mouse = new Mouse();
        mouse.setName(cartoonProperties.getMouse()!=null && StringUtils.hasText(cartoonProperties.getMouse().getName()) ? cartoonProperties.getMouse().getName() : "jerry");
        mouse.setAge(cartoonProperties.getMouse()!=null && cartoonProperties.getMouse().getAge()!=null ? cartoonProperties.getMouse().getAge() : 4);
 
    }
    public void play(){
        System.out.println(cat.getAge()+"歲的"+cat.getName()+"和"+ mouse.getAge()+"歲的"+mouse.getName()+"打起來了");
    }
}

將業(yè)務(wù)功能bean運行需要的資源抽取長獨立的屬性類，設(shè)置讀取配置文件的信息

@Data
//類與配置文件綁定
@ConfigurationProperties(prefix = "cartoon")
public class CartoonProperties {
    private Cat cat;
    private Mouse mouse;
}

測試：

@SpringBootApplication
//當(dāng)運行時將CartoonCatAndMouse類加載成bean，不允許不加載
@Import(CartoonCatAndMouse.class)
public class Demo15SpringbootBeanpropertiesApplication {
    public static void main(String[] args) {
        ConfigurableApplicationContext ctx = SpringApplication.run(Demo15SpringbootBeanpropertiesApplication.class, args);
        CartoonCatAndMouse bean = ctx.getBean(CartoonCatAndMouse.class);
        bean.play();
    }
}