使用 Spring Boot 连接到 MongoDb

Question

我想通过 aplication.properties 文件将 Spring Boot REST Api 项目连接到 MongoDb。为什么？因为这对我来说似乎更容易。

我知道如何与 MySQL 数据库建立这种连接。我已经下载了 MongoDb Compass GUI。

application.properties 文件

spring.data.mongodb.uri=mongodb://localhost:27017/springtest
spring.data.mongodb.username=mihai
spring.data.mongodb.password=mihai

我使用 uri 因为我发现如果 MongoDb 版本 > 3.x.x 你应该使用它。我的 MongoDb 版本是 4.4.4

用户收藏：link

pom 文件：

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf.extras</groupId>
            <artifactId>thymeleaf-extras-springsecurity5</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-mongodb</artifactId>
            <version>3.1.6</version>
        </dependency>
        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>3.12.8</version>
        </dependency>


        <!--##################################################-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.4.4</version>
            </plugin>
        </plugins>
    </build>

</project>

用户存储库文件：

public interface UserRepository extends MongoRepository<Users, String> {

}

主应用程序文件：

@SpringBootApplication(exclude={SecurityAutoConfiguration.class})
public class AdServicesApplication {

    public static void main(String[] args) {
        SpringApplication.run(AdServicesApplication.class, args);
    }

}

我得到以下错误恍惚：

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


Process finished with exit code 0

根据我的研究，我发现问题可能是由于 application.properties 文件中提供的配置，但我真的不知道如何为 MongoDb 正确编写它。

例如，如果我将 application.properties 内容更改为：

spring.datasource.url=jdbc:mysql://localhost:3306/employee_directory?useSSL=false
spring.datasource.username=mihai
spring.datasource.password=mihai

效果很好。

谢谢！

Answer 1

尝试删除依赖

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

并使用配置

spring.data.mongodb.uri=mongodb://localhost:27017/springtest
spring.data.mongodb.username=mihai
spring.data.mongodb.password=mihai

当您添加依赖项时，它需要一个您未提供的数据源 url