我尝试使用Spring Data构建项目以连接到MongoDB,如下所示: 的 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());
}
}
的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>
当我运行项目时,它会抛出异常:
没有符合条件的bean&#39; ups.mongo.service.ReconInputService&#39; 可用。
请帮我解决此错误的任何建议。谢谢!
更新1
将 @ComponentScan(basePackages =&#34; ups.mongo&#34;)添加到 SpringMongoConfig.java 。 然后我得到了新的问题: 创建具有名称&#39; ReconInputService的bean时出错:通过字段“reconInputRepository”表达的不满意的依赖性&#39 ;; 嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException:没有类型&#39; ups.mongo.repository.ReconInputRepository&#39;的限定bean。可用:预计至少有1个豆有资格作为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 。我替换了从Spring数据扩展的 ReconInputRepository.java ,我自己实现如下:
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;
}
}
然后它正常工作。
我的摘要 问题可能来自Spring不支持注入界面 - 如 @amdg 建议(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
答案 0 :(得分:2)
因为你在ReconInputServiceImpl上注释了@Service,所以 请在主类
中添加ReconInputServiceImpl.classReconInputService reconInputService = ctx.getBean(ReconInputServiceImpl.class);
答案 1 :(得分:1)
正如我所怀疑的那样,你将普通的Spring和Spring Boot混合在一起,想要获得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应用的根目录中(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。而是在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
答案 2 :(得分:0)
您可以将ReconInputServiceImpl
课程注释为@Service("reconInputService")
。
然后您可以按如下方式访问它。
ReconInputService reconInputService = ctx.getBean("reconInputService",ReconInputService.class);
答案 3 :(得分:0)
ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
如果使用上述构造函数,DI容器将仅从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,请使用此构造函数
AnnotationConfigApplicationContext(java.lang.String... basePackages)
答案 4 :(得分:0)
我以前仅添加了spring-data-mongodb
软件包,这使我忙于调试“某些存储库没有合格的bean”。
添加spring-boot-starter-data-mongodb
之后,一切都在spring之前完成。
application.yaml
spring:
data:
mongodb:
uri: mongodb://username:password@localhost:27017
database: test
pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>