我正在尝试构建一个项目以使用 Spring Data 连接到 MongoDB,如下所示: SpringMongoConfig.java
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
import com.mongodb.MongoClient;
@Configuration
public class SpringMongoConfig {
@Bean
public MongoDbFactory mongoDbFactory() throws Exception {
return new SimpleMongoDbFactory(new MongoClient("127.0.0.1"), "ReconInput");
}
@Bean
public MongoTemplate mongoTemplate() throws Exception {
MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory());
return mongoTemplate;
}
}
ReconInputRepository.java:
@Repository
public interface ReconInputRepository extends MongoRepository<ReconInput, String> {
public List<ReconInput> findByReportingDate(String reportingDate);
}
ReconInputService.java
public interface ReconInputService {
public List<ReconInput> getInputByReportingDate(String reportingDate);
}
ReconInputServiceImpl.java
@Service
public class ReconInputServiceImpl implements ReconInputService {
@Autowired
private ReconInputRepository reconInputRepository;
public List<ReconInput> getInputByReportingDate(String reportingDate) {
return reconInputRepository.findByReportingDate(reportingDate);
}
}
App.java
public class App
{
public static void main( String[] args )
{
ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
ReconInputService reconInputService = ctx.getBean(ReconInputService.class);
List<ReconInput> inputData = reconInputService.getInputByReportingDate("2017 Nov 20");
System.out.println(inputData.get(0).getReportId());
}
}
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ups.mongodb</groupId>
<artifactId>MongoConnection</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>MongoConnection</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>5.0.1.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver -->
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>3.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-mongodb -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<version>2.0.1.RELEASE</version>
</dependency>
</dependencies>
</project>
当我运行这个项目时,它抛出一个异常:
No qualifying bean of type 'ups.mongo.service.ReconInputService' available.
请帮我解决这个错误的任何建议。谢谢!
更新 1
将 @ComponentScan(basePackages = "ups.mongo") 添加到 SpringMongoConfig.java。 然后我得到了新问题: 创建名称为“ReconInputService”的 bean 时出错:通过字段“reconInputRepository”表达的依赖关系不满足; 嵌套异常是 org.springframework.beans.factory.NoSuchBeanDefinitionException:没有可用类型为“ups.mongo.repository.ReconInputRepository”的合格 bean:预计至少有 1 个 bean 有资格作为 Autowiring 候选者。依赖注解:{@org.springframework.beans.factory.annotation.Autowired(required=true)}
更新 2
而不是使用 Spring Data MongoRepository。我通过自己实现它来替换从 Spring 数据扩展的 ReconInputRepository.java 如下:
ReconInputRepository.java
public interface ReconInputRepository {
public List<ReconInput> findByReportingDate(String reportingDate);
}
ReconInputRepositoryImpl.java
@Repository
public class ReconInputRepositoryImpl implements ReconInputRepository {
@Autowired
MongoTemplate mongoTemplate;
public List<ReconInput> findByReportingDate(String reportingDate) {
List<ReconInput> reconInputList = null;
Query searchUserQuery = new Query(Criteria.where("reportingDate").is(reportingDate));
reconInputList = mongoTemplate.find(searchUserQuery, ReconInput.class);
return reconInputList;
}
}
然后它就可以正常工作了。
我的总结 问题可能来自 Spring 不支持注入(inject)接口(interface) - 正如 @amdg 所建议的(但在 spring boot 中工作 - 我不知道为什么,如果有人知道请给我一些评论)。
引用:Spring interface injection example
更新 3
最后,我找到了最简单的正确制作方法。
我需要做的就是将 @EnableMongoRepositories({ "ups.mongo.repository"})
添加到 SpringMongoConfig.java
最佳答案
正如我所怀疑的,您将普通的旧 Spring 与 Spring Boot 混合在一起并希望获得 Spring Boot 效果。
为了使用 Spring Boot,您应该更新依赖项以使用 Spring Boot Starters。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ups.mongodb</groupId>
<artifactId>MongoConnection</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>MongoConnection</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
然后只需将您的配置添加到您应用的根包(大概是ups.mongo
):
@SpringBootApplication
@EnableMongoRepositories
public class App
{
public static void main( String[] args )
{
ConfigurableApplicationContext ctx = SpringApplication.run(App.class, args);
ReconInputService reconInputService = ctx.getBean(ReconInputService.class);
List<ReconInput> inputData = reconInputService.getInputByReportingDate("2017 Nov 20");
System.out.println(inputData.get(0).getReportId());
}
}
在这种情况下,您甚至不需要 SpringMongoConfig.class。相反,在您的 application.properties
中添加以下配置:
spring.data.mongodb.host=127.0.0.1
spring.data.mongodb.port=27017
spring.data.mongodb.database=demo
关于java - SpringData-MongoDB : No qualifying bean of type available,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47171887/