我正在尝试使用Spring Data构建一个连接到MongoDB的项目,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;
}
}
recon input repository.Java:
@Repository
public interface ReconInputRepository extends MongoRepository<ReconInput, String> {
public List<ReconInput> findByReportingDate(String reportingDate);
}
recon input service.Java
public interface ReconInputService {
public List<ReconInput> getInputByReportingDate(String reportingDate);
}
recon input service imp了.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.hml
<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>
当我运行该项目时,它会抛出异常:
没有'ups.mongo.service.ReconInputService'类型的限定bean可用。
请帮我提一下这个错误的建议。谢谢 !
更新1
将@ComponentScan(basePackages =“ups.mongo”)添加到SpringMongoConfig.java。然后我遇到了新问题:创建名为'ReconInputService'的bean时出错:通过字段'reconInputRepository'表示不满意的依赖关系;嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException:没有类型'ups.mongo.repository.ReconInputRepository'的限定bean可用:预期至少有1个bean有资格作为autowire候选者。依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}
更新2
而不是使用Spring Data MongoRepository。我替换了自Spring实现的ReconInputRepository.java,如下所示:
recon input repository.Java
public interface ReconInputRepository {
public List<ReconInput> findByReportingDate(String reportingDate);
}
recon input repository imp了.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;
}
}
然后它正常工作。
我的总结问题可能来自Spring不支持注入界面 - 正如@amdg建议的那样(但是在春季启动工作 - 我不知道为什么,如果有人知道,请给我一些评论)。
参考:Spring interface injection example
更新3
最后,我找到了最简单的正确方法。我需要做的就是将@EnableMongoRepositories({ "ups.mongo.repository" })
添加到SpringMongoConfig.java中
由于您在ReconInputServiceImpl上注释了@Service,请在主类中添加ReconInputServiceImpl.class
ReconInputService reconInputService = ctx.getBean(ReconInputServiceImpl.class);
正如我所怀疑的那样,你将普通的Spring和Spring Boot混合在一起并希望获得Spring Boot效果。
要使用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>
然后只需在您的应用程序的根软件包中添加您的配置(可能是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
您可以将ReconInputServiceImpl
类注释为@Service("reconInputService")
。
然后,您可以按如下方式访问它。
ReconInputService reconInputService = ctx.getBean("reconInputService",ReconInputService.class);
ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
如果使用上面的构造函数,DI容器将只从SpringMongoConfig
类加载bean定义。
如果您希望DI容器以递归方式扫描特定基础包的所有bean定义,请改用此构造函数
AnnotationConfigApplicationContext(java.lang.String... basePackages)