spring注解加载配置文件

配置类：congig.java 

package com.fsp.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.ComponentScans;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Service;

import com.fsp.bean.Person;

//配置类 == 配置文件
@Configuration
/*@ComponentScan(value = "com.fsp",excludeFilters = {
		@Filter(type = FilterType.ANNOTATION,classes = {Controller.class,Service.class})
})*/
//excludeFilters = filter[] 指定扫描的时候按照什么规则排除那些组件
@ComponentScan(value = "com.fsp",includeFilters = {
		@Filter(type = FilterType.ANNOTATION,classes = {Service.class})
},useDefaultFilters = false)
//includeFilters = filter[] 指定扫描的时候按照什么规则包含哪些组件
//useDefaultFilters默认为true,必须改成false,不还是全部都加载
@ComponentScans(value = {
		@ComponentScan(value = "com.fsp",includeFilters = {
				@Filter(type = FilterType.ANNOTATION,classes = {Service.class})
		},useDefaultFilters = false)
})
//@ComponentScans可以配置多个@ComponentScan
public class MainConfig {

	@Bean
	public Person person() {
		return new Person("fsp",24);
	}
}

 测试类：IOCTest.java:

package com.fsp.test;

import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import com.fsp.config.MainConfig;

public class IOCTest {
	
	@Test
	public void test01() {
		AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfig.class);
		String[] definitionNames = applicationContext.getBeanDefinitionNames();
		for (String name : definitionNames) {
			System.out.println(name);
		}
	}

}

导入包：

 
        
        
            org.springframework
            spring-context
            4.3.12.RELEASE
        
        
            junit
            junit
            4.12
            test
        

 

源码分析