Bean的作用域

1.新建一个ScopeBean类

package com.springboot.chapter3.scope.pojo;

import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ScopeBean {
}

默认作用域为单例，加上@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)表示多例。

2.测试

package com.springboot.chapter3.config;

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

@Configuration
@ComponentScan("com.springboot.chapter3.*")
public class AppConfig {
}

package com.springboot.chapter3;

import com.springboot.chapter3.config.AppConfig;
import com.springboot.chapter3.scope.pojo.ScopeBean;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

@SpringBootTest
class Chapter3ApplicationTests {

    @Test
    void contextLoads() {
        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
        ScopeBean scopeBean1 = ctx.getBean(ScopeBean.class);
        ScopeBean scopeBean2 = ctx.getBean(ScopeBean.class);
        System.out.println(scopeBean1==scopeBean2);
    }

}

Bean的作用域

原文：https://www.cnblogs.com/xl4ng/p/12682699.html