Java -- springboot 配置註冊組件方式

1、@Import class

package com.vim.common.config;

import com.vim.modules.test.Test1;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

@Configuration
@Import(Test1.class)
public class BeanConfig {
}

2、@Import selector

package com.vim.common.config;

import com.vim.modules.test.Test1;
import org.springframework.context.annotation.ImportSelector;
import org.springframework.core.type.AnnotationMetadata;

public class BeanImportSelector implements ImportSelector{
    @Override
    public String[] selectImports(AnnotationMetadata importingClassMetadata) {
        return new String[]{Test1.class.getName()};
    }
}

package com.vim.common.config;

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

@Configuration
@Import({BeanImportSelector.class})
public class BeanConfig {
}

3、@Import define

package com.vim.common.config;

import com.vim.modules.test.Test1;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.type.AnnotationMetadata;

public class CustomBeanDefinitionRegistry implements ImportBeanDefinitionRegistrar {

    @Override
    public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
        if(!registry.containsBeanDefinition("test1")){
            registry.registerBeanDefinition("test", new RootBeanDefinition(Test1.class));
        }
    }
}

package com.vim.common.config;

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

@Configuration
@Import({CustomBeanDefinitionRegistry.class})
public class BeanConfig {
}