Spring找到2个候选人，但只有一个

Question

我正在尝试升级 JHipster 项目，但是我发现了以下问题:

Description:
Parameter 0 of constructor in com.cervaki.config.AsyncConfiguration required a single bean, but 2 were found:
- jhipster-io.github.jhipster.config.JHipsterProperties: defined in null
- io.github.jhipster.config.JHipsterProperties: defined in null
Action:
Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

我的理解是spring无法注入(inject)正确的bean，因为有两个候选者，但我只有 io.github.jhipster.config.JHipsterProperties 实现:

package com.cervaki.config;

import io.github.jhipster.async.ExceptionHandlingAsyncTaskExecutor;
import io.github.jhipster.config.JHipsterProperties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.aop.interceptor.SimpleAsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.*;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;

@Configuration
@EnableAsync
@EnableScheduling
public class AsyncConfiguration implements AsyncConfigurer {

    private final Logger log = LoggerFactory.getLogger(AsyncConfiguration.class);

    private final JHipsterProperties jHipsterProperties;

    public AsyncConfiguration(JHipsterProperties jHipsterProperties) {
        this.jHipsterProperties = jHipsterProperties;
    }

    @Override
    @Bean(name = "taskExecutor")
    public Executor getAsyncExecutor() {
        log.debug("Creating Async Task Executor");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(jHipsterProperties.getAsync().getCorePoolSize());
        executor.setMaxPoolSize(jHipsterProperties.getAsync().getMaxPoolSize());
        executor.setQueueCapacity(jHipsterProperties.getAsync().getQueueCapacity());
        executor.setThreadNamePrefix("cervaki-Executor-");
        return new ExceptionHandlingAsyncTaskExecutor(executor);
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new SimpleAsyncUncaughtExceptionHandler();
    }
}

您可以下载 pom.xml here .

我在整个代码和库中进行了搜索以找到 jhipster-io.github.jhipster.config.JHipsterProperties 文件，但是我没有找到任何东西。
我能做些什么来解决这个问题？

Answer 1

在生成新的 JhipsterApp 后，我也遇到了这个问题，
和你一样 - 我在项目中找不到“jhipster-io”依赖项
我如何解决这个问题:

在 src/main/java/your/package/config创建一个“AppConfiguration.java”

内容:

import io.github.jhipster.config.JHipsterProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

@Configuration 
public class AppConfiguration {

    @Bean
    @Primary
    public JHipsterProperties jHipsterProperties() {
        return new JHipsterProperties();
    }
}

即使没有 @Primary - 我没有这个错误