如何在非Spring的构造型类中使用@Autowired [英] How to use @Autowired in not Spring's stereotype classes

问题描述

我想在此类中使用该存储库，但是当我放置类似@Component的构造型时，我会从IDE中收到错误消息:

I would like to use that repository in this class, but when I put a stereotype like @Component, I get an error from the IDE:

无法自动接线.找不到身份验证"类型的豆.

Could not autowire. No beans of 'Authentication' type found.

public class CustomMethodSecurityExpressionRoot extends SecurityExpressionRoot implements MethodSecurityExpressionOperations {

    @Autowired
    private FlatRepository flatRepository;

    public CustomMethodSecurityExpressionRoot(Authentication authentication) {
        super(authentication);
     }
}

推荐答案

在SecurityExpressionRoot内不能@Autowire.
但是，您可以手动提供FlatRepository依赖项.

You cannot @Autowire inside a SecurityExpressionRoot.
You can however manually provide that FlatRepository dependency.

在@Configuration类中配置安全对象时，可以在其中@Autowire所需的任何实例.

As you're configuring your Security objects inside a @Configuration class, there you're able to @Autowire any instance you need.

只需在CustomMethodSecurityExpressionRoot构造函数中为该新依赖项腾出空间

Simply make space for that new dependency in CustomMethodSecurityExpressionRoot constructor

class CustomMethodSecurityExpressionRoot extends SecurityExpressionRoot 
                                         implements MethodSecurityExpressionOperations {
    private final FlatRepository flatRepository;

    CustomMethodSecurityExpressionRoot(
            final Authentication authentication,
            final FlatRepository flatRepository) {
        super(authentication);
        this.flatRepository = flatRepository;
    }

    ...
}

并在实例化点手动注入

final SecurityExpressionRoot root = new CustomMethodSecurityExpressionRoot(authentication, flatRepository);

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