无法实例化Spring bean存储库 [英] Can't instantiate Spring bean repository

问题描述

在此任务中，我不允许使用自动接线

In this task I am not allowed to use auto-wiring

所以我正在尝试创建类似以下内容: https://www.tutorialspoint. com/spring/spring_java_based_configuration.htm

so I am trying to create something similar to this: https://www.tutorialspoint.com/spring/spring_java_based_configuration.htm

我的代码

@Configuration
public class ApplicationConfig {

    @Bean
    public FoodService foodService() {
        return new FoodService(FoodRepository());
    }

    @Bean
    public FoodRepository foodRepository() {
        return new FoodRepository();
    }
}

当然，因为FoodRepository是扩展MongoRepository的接口，所以它给出一个错误，即尚未实例化，并且可以肯定，在服务内部，我需要调用Repository进行保存等.该如何解决?

Of course since FoodRepository is an interface extending MongoRepository, it gives an error that it has not been instantiated, and for sure inside the service I need to be calling the Repository to save and such. How to solve this?

推荐答案

我在在ApplicationConfig.java内部，我应该执行以下操作:

Inside ApplicationConfig.java I should have done the following:

@Configuration
@EnableMongoRepositories("com.food.repository")
public class ApplicationConfig {
@Value("${spring.data.mongodb.host}")
private String mongoHost;

@Value("${spring.data.mongodb.port}")
private int mongoPort;

@Value("${spring.data.mongodb.database}")
private String mongoDB;

@Bean
public foodService foodService() {
    MongoOperations operations = new MongoTemplate(new MongoClient(mongoHost,mongoPort), mongoDB);
    MongoRepositoryFactory factory = new MongoRepositoryFactory(operations);
    foodRepository foodRepository = factory.getRepository(foodRepository.class);
    return new foodService(foodRepository);
}

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