@Configuration+@ConfigurationProperties+@EnableConfigurationProperties
最佳设计方案（现在又改板了）：
Bean上面直接设置@ConfigurationProperties
//需要依赖spring-boot-configuration-processor
@ConfigurationProperties(prefix = "stu")
public class Stu {
String name;
public Stu(String name) {
this.name = name;
}
public Stu() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Stu{" +
"name='" + name + '\'' +
'}';
}
}
方式一：configuration上面跟随@EnableConfigurationProperties【这种情况只有configuration里面一个Bean 】
@Configuration
@EnableConfigurationProperties
public class StuConfiguration {
@Bean
public Stu stu(){
return new Stu();
}
}
方式二：configuration上面跟随@EnableConfigurationProperties【这种情况只有configuration里面一个Bean 】
package com.example.demo11.configuration;
import com.example.demo11.entity.Stu;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
//@EnableConfigurationProperties(Stu.class),如果携带class参数则有用注册Bean的能力,
//因为实现了ImportBeanDefinitionRegistrar接口,Import三插之一
//这里的Bean名称非常有意思【类型名称+全包名】
@EnableConfigurationProperties(Stu.class)
public class StuConfiguration {
@Bean
public Stu stu2(){
return new Stu();
}
}
启动查看
@SpringBootApplication
public class Demo11Application {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(Demo11Application.class, args);
Stu stu = context.getBean("stu-com.example.demo11.entity.Stu", Stu.class);
System.out.println(context.getBeansOfType(Stu.class).size());
System.out.println(stu.toString());
context.close();
}
}
