【发布时间】：2015-02-19 18:05:29
【问题描述】：
代码执行良好，但在默认的 mongo 数据库和位置（即 test 数据库@localhost:27017 中创建集合。在通过以下 xml 连接的 mongoTemplate bean 中，我使用 mydb 作为数据库，mongod 实例在 localhost:27018 上运行。但是，数据仍会保存到默认实例和数据库中。
在 src/main/resources/mongo-context.xml 中定义的 MongoDB XML Bean：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">
<mongo:mongo id="mongo" host="localhost" port="27018"/>
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
<constructor-arg ref="mongo" />
<constructor-arg value="mydb" />
</bean>
<mongo:repositories base-package="core.repository" mongo-template-ref="mongoTemplate"/>
</beans>
播放列表存储库：
package core.repository;
import core.dao.Playlist;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.repository.Repository;
/**
* This repository provides CRUD operations for {@link core.dao.Playlist} objects.
*/
public interface PlaylistRepository extends Repository<Playlist, String> {
/**
* Finds the information of a single Playlist entry.
* @param id The id of the requested Playlist entry.
* @return The information of the found Playlist entry. If no Playlist entry
* is found, this method returns an empty {@link java.util.Optional} object.
*/
Optional<Playlist> findOne(String id);
/**
* Saves a new Playlist entry to the database.
* @param saved The information of the saved Playlist entry.
* @return The information of the saved Playlist entry.
*/
Playlist save(Playlist saved);
}
使用存储库的播放列表服务：
package core.service;
import core.dao.*;
import core.error.NotFoundException;
import core.repository.PlaylistRepository;
import core.simulator.PlaylistServiceSimulator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* Executes the business logic promised by the {@link core.service.PlaylistService} interface.
*/
@Service
final class PlaylistServiceExecutor implements PlaylistService {
private static final Logger LOGGER = LoggerFactory.getLogger(PlaylistServiceExecutor.class);
private final PlaylistRepository repository;
private final PlaylistServiceSimulator simulator;
@Autowired
PlaylistServiceExecutor(PlaylistRepository repository, PlaylistServiceSimulator simulator) {
this.repository = repository;
this.simulator = simulator;
}
@Override
public PlaylistDTO create(PlaylistDTO playlist) {
LOGGER.debug("Creating a new Playlist entry with information: {}", playlist);
Playlist persisted = Playlist.build()
persisted = repository.save(persisted);
LOGGER.debug("Created a new Playlist entry with information: {}", persisted);
return persisted.toDTO();
}
@Override
public PlaylistDTO findById(String id) {
LOGGER.debug("Finding Playlist entry with id: {}", id);
Playlist found = findPlaylistById(id);
LOGGER.debug("Found Playlist entry: {}", found);
return found.toDTO();
}
private Playlist findPlaylistById(String id) {
Optional<Playlist> result = repository.findOne(id);
return result.orElseThrow(() -> new NotFoundException(id));
}
}
pom.xml：
<?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>myapp</groupId>
<artifactId>core</artifactId>
<version>0.1</version>
<properties>
<!-- Enable Java 8 -->
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- Configure the main class of our Spring Boot application -->
<start-class>core.CoreApp</start-class>
</properties>
<!-- Inherit defaults from Spring Boot -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.9.RELEASE</version>
</parent>
<dependencies>
<!-- Get the dependencies of a web application -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
<!-- Spring Data MongoDB-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-all</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>1.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.9.5</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<version>0.9.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path-assert</artifactId>
<version>0.9.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Spring Boot Maven Support -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
最后是SpringApplication引导类CoreApp：
package core;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
/**
* This configuration class has three responsibilities:
* <ol>
* <li>It enables the auto configuration of the Spring application context.</li>
* <li>
* It ensures that Spring looks for other components (controllers, services, and repositories) from the
* <code>core</code> package.
* </li>
* <li>It launches our application in the main() method.</li>
* </ol>
*/
@Configuration
@EnableAutoConfiguration
@ComponentScan
public class CoreApp {
public static void main(String[] args) {
SpringApplication.run(CoreApp.class, args);
}
}
【问题讨论】：
-
您还有其他配置吗？这似乎是书本上的。
-
没有。我试图弄清楚如何将外部定义的属性传递给spring应用程序，这是我在阅读了很多文章后的第一次尝试。我想知道是否应该从 MongoRepository 扩展 PlaylistRepository 而不仅仅是存储库。会试一试的。
-
Spring boot 自动配置可能会获取您的
spring-data-mongodb依赖项并自动配置您的 mongo 存储库。 Spring 是如何知道您的mongo-context.xml的？我没有看到它在任何地方被引用
标签： spring mongodb spring-boot spring-data-mongodb