SpringBoot-常用注解

配置注解：

@Component、@Configuration、@Bean、@Import、@Resource、@Qualifier、@Mapper、@Service、@autowired、@Value、@bean、@entity、@Table、@Transient

参数注解：

@param、@requestparam、@requestbody

代码：

Car

package com.wange.anno;

public interface Car {
    public void print();
}

View Code

Bmw

package com.wange.anno;

import org.springframework.stereotype.Component;

@Component
public class Bmw implements Car{
    @Override
    public void print() {
        System.out.println("我是BMW");
    }
}

View Code

RangeRover

package com.wange.anno;

import org.springframework.stereotype.Component;

@Component
public class RangeRover implements Car{
    @Override
    public void print() {
        System.out.println("我是range rover");
    }
}

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ConfigurationA

package com.wange.anno;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ConfigurationA {

    @Bean("rangerover")
    public Car getRangerover(){
        return new RangeRover();
    }
}

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ConfigurationB

package com.wange.anno;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ConfigurationB {

    @Bean("bmw")
    public Car getBmw(){
        return new Bmw();
    }
}

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Config

package com.wange.anno;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

@Configuration
@Import({ConfigurationA.class, ConfigurationB.class})
public class Config {

}

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Test

package com.wange.anno;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class ContextLoaderTest {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(Config.class);
        Car bmw = (Car)context.getBean("bmw");
        bmw.print();

        RangeRover rangeRover = (RangeRover)context.getBean("rangerover");
        rangeRover.print();
    }
}

View Code

结果：

我是BMW

我是range rover