Spring有哪些注入方式呢?

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Spring有哪些注入方式呢?

下文笔者讲述Spring注入方式分享，如下所示

Spring中有以下注入方式:
    1.setter属性注入
	2.构造方法注入
	3.lombok注入

例:

1.setter属性注入

@Controller
public class HelloController {
    private TestService testService;
    private UserService userService;
    
    @Autowired
    public void setAlphaService(TestService testService) {
        this.alphaService = alphaService;
    }
    @Autowired
    public void setBetaService(UserService userService) {
        this.betaService = betaService;
    }
}

2.构造方法注入

普通实现方法
@Controller
public class HelloController {
    private final TestService testService;
    private final UserService userService;
    
    @Autowired
    public HelloController(TestService testService, UserService userService) {
        this.testService = testService;
        this.userService = userService;
    }
}

3.lombok注解方式

@AllArgsConstructor
@Controller
public class HelloController {
    private final TestService testService;
    private final UserService userService;a
}

目前我们最常用的注解方式为:注解注入

注解方式注入
@Controller
public class HelloController {
    @Autowired
    private TestService testService;
    @Autowired
    private UserService userService;
}