Using Spring Boot —— Spring Beans and Dependency Injection

Spring Beans

　　@ComponentScan  扫描指定包下的@Component @Controller @Service @Respository类

　　@Autowired 自动注入bean，可以在属性/构造方法/set方法上使用

　　

package com.example.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class DatabaseAccountService implements AccountService {

    private final RiskAssessor riskAssessor;

    @Autowired
    public DatabaseAccountService(RiskAssessor riskAssessor) {
        this.riskAssessor = riskAssessor;
    }

    // ...

}