这个问题在这里已经有了答案：

为什么自动连接spring存储库不起作用(1个答案）
三个月前关门了。
我有一个自动连接catalogdao类的测试类。但是catalogdao类不是自动连接的。值为空；
测试等级

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {PersistenceConfig.class})
public class CatalogDaoIT {
    @Autowired
    private CatalogDao catalogDao;
    @Test
    public void saveCatalog_readSame_foundOne() {
        // arrange
        Catalog catalog = new Catalog();

配置类

package ch.matica.platform.persistence.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@Configuration
@PropertySource("classpath:application.properties")
@ComponentScan(basePackages = "ch.matica.platform.persistence")
public class PersistenceConfig {
        @Bean
        public static PropertySourcesPlaceholderConfigurer propertiesResolver() {
            return new PropertySourcesPlaceholderConfigurer();
        }
}

道类

package ch.matica.platform.persistence;
import java.util.Collection;
...
@Repository
public class CatalogDao {
...