spring无法示例化类:原因:java.lang.nosuchmethodexception

crcmnpdw  于 2021-07-14  发布在  Java
关注(0)|答案(0)|浏览(234)

我试图在一个类中注入一个utils类,这个类将截获数据库查询,但是,很显然,spring找不到构造函数。两个类都用 @Component 并对 Package 中的其他Spring部件进行了扫描。
utils类如下所示:

@Component
public class Utils {

    private static final String LOCAL_PROFILE = "local";

    private final Environment environment;
    private final String dummy = "dummy";

    @Autowired
    public Utils(Environment environment) {
        this.environment = environment;
    }

    public String getInfo() {

        //to avoid ST Visa issues in Local environment
        if (environment != null && Arrays.asList(environment.getActiveProfiles()).contains(LOCAL_PROFILE)) {
            return dummy;
        }

        return SecurityContextHolder.getContext().getAuthentication().getName();
    }
}

我要在其中注入utils的拦截器如下所示:

@Component
public class ContractInterceptor implements StatementInspector {

    private final Utils utils;

    @Autowired
    public ContractInterceptor(Utils utils) {
        this.utils = utils;
    }

    @Override
    public String inspect(String sql) {
        //String info = utils.getInfo();
        log.info("Enter Interceptor" + sql);
        return sql;
    }
}

Spring失效

Caused by: java.lang.NoSuchMethodException: com.package.interceptor.<init>()    at
java.base/java.lang.Class.getConstructor0(Class.java:3349)  at
java.base/java.lang.Class.newInstance(Class.java:556)

谢谢。

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