@Value 赋值
@PropertySource 加载外部配置文件
配置文件
@PropertySource("classpath:/person.properties")
@Configuration
@ComponentScan(value = "com.tommy.bean")
public class ValueConfig {
}
person.properties
person.nickName=TommyDog
bean类
@Data
@Component
public class Person {
@Value("jm")
private String name;
@Value("#{30-12}")
private int age;
@Value("${person.nickName}")
private String nickName;
public Person(String name, int age, String nickName) {
this.name = name;
this.age = age;
this.nickName = nickName;
}
public Person() {
}
}
测试类
public class IOCValueTest {
@Test
public void testImport(){
ApplicationContext applicationContext = new AnnotationConfigApplicationContext(ValueConfig.class);
printDefineName(applicationContext);
System.out.println("============================");
final Person person = (Person) applicationContext.getBean("person");
System.out.println("person to string1 : "+person.toString() );
final Person bean = applicationContext.getBean(Person.class);
System.out.println("person to string2 : "+bean.toString() );
}
private void printDefineName(ApplicationContext applicationContext) {
final String[] beanDefinitionNames = applicationContext.getBeanDefinitionNames();
for (String name :beanDefinitionNames) {
System.out.println("name： "+name);
}
}
}
测试结果：
name： org.springframework.context.annotation.internalConfigurationAnnotationProcessor
name： org.springframework.context.annotation.internalAutowiredAnnotationProcessor
name： org.springframework.context.annotation.internalCommonAnnotationProcessor
name： org.springframework.context.event.internalEventListenerProcessor
name： org.springframework.context.event.internalEventListenerFactory
name： valueConfig
name： dog
name： fish
name： myBeanPostProcessor
name： person
============================
person to string1 : Person(name=jm, age=18, nickName=TommyDog)
person to string2 : Person(name=jm, age=18, nickName=TommyDog)
Process finished with exit code 0
