我正在尝试使用 Docker-Compose 设置一个简单的 Spring JPA 连接。
这是我的 docker-compose.yml:
services:
postgres-database:
image: postgres
volumes:
- ./data:/var/lib/postgresql/data
environment:
POSTGRES_USER: ${POSTGRES_USER}
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
POSTGRES_DB: ${POSTGRES_DB}
networks:
- spring-app
spring-app:
image: spring-app
build:
context: ./
dockerfile: Dockerfile
environment:
SPRING_DATASOURCE_URL: jdbc:postgresql://postgres-database:5432/${POSTGRES_DB}
SPRING_DATASOURCE_DRIVER-CLASS-NAME: org.postgresql.Driver
SPRING_DATASOURCE_USERNAME: ${POSTGRES_USER}
SPRING_DATASOURCE_PASSWORD: ${POSTGRES_PASSWORD}
depends_on:
- postgres-database
ports:
- 8080:8080
networks:
- spring-app
我的 pom.xml 看起来像这样:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>NaN</groupId>
<artifactId>NaN</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-app</name>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</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-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.12</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我习惯于看到 Spring 在开始任何操作之前尝试连接到数据库。我设置了一些临时存储库以确保它有一些可以使用的实体。
日志记录如下所示:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.0.RELEASE)
2020-06-03 14:43:36.810 INFO 1 --- [ main] n.p.p.o.SpringApplication : Starting SpringApplication v0.0.1-SNAPSHOT on c41863fe7cb8 with PID 1 (/spring-app.jar started by root in /)
2020-06-03 14:43:36.814 INFO 1 --- [ main] n.p.p.o.SpringApplication : No active profile set, falling back to default profiles: default
2020-06-03 14:43:38.750 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-06-03 14:43:38.781 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-06-03 14:43:38.782 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.35]
2020-06-03 14:43:38.875 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-06-03 14:43:38.875 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1991 ms
2020-06-03 14:43:39.338 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-06-03 14:43:39.663 INFO 1 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 3 endpoint(s) beneath base path '/actuator'
2020-06-03 14:43:39.734 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-06-03 14:43:39.757 INFO 1 --- [ main] n.p.p.o.SpringApplication : Started SpringApplication in 3.975 seconds (JVM running for 4.953)
2020-06-03 14:44:15.560 INFO 1 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-06-03 14:44:15.561 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-06-03 14:44:15.587 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 25 ms
我需要添加什么来确保 Spring 连接到数据库？我想在继续之前测试这个 docker 环境设置。
最佳答案
看看 Spring References 。
要建立连接，您只需在 application.properties 中定义正确的属性。要执行更多操作，您需要创建至少一个实体并调用它。
关于java - Spring JPA 的最低要求是什么，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62176462/