如何从具有 spring 引导的 docker 容器连接到具有 Z62A004B959746BB97541AFA4 数据库的 docker 容器

Question

我正在尝试将 spring 启动 docker 容器连接到 mysql Z05B6053C41A2130AFDZ6BFC3E 容器没有 spring 启动 docker 容器连接没问题，但是当我启动 docker-compose 和 Z2A2D595E2B63A0B234D6Z 时，出现此错误：

Caused by: java.net.ConnectException: Connection refused
        at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[na:na]
        at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:658) ~[na:na]
        at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:542) ~[na:na]
        at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:597) ~[na:na]
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:333) ~[na:na]
        at java.base/java.net.Socket.connect(Socket.java:648) ~[na:na]
        at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:63) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
        ... 61 common frames omitted

我的 docker-compose.yml：

 version: '3' services: db: container_name: mysql_db image: mysql:8.0 environment: MYSQL_ROOT_PASSWORD: root MYSQL_DATABASE: mydatabase MYSQL_USER: user MYSQL_PASSWORD: password MYSQL_ROOT_HOST: '%' ports: - "3306:3306" restart: always server: container_name: server build: context: . dockerfile: Dockerfile.server networks: - server-network depends_on: - db ports: - "8080:8080" networks: server-network: driver: bridge

Dockerfile.server：

 FROM openjdk:15-jdk-alpine ARG JAR_FILE=build/libs/\*.jar COPY ${JAR_FILE} app.jar ENTRYPOINT ["java", "-jar", "/app.jar"]

应用程序属性：

 spring.datasource.url=jdbc:mysql://localhost:3306/mydatabase spring.datasource.username=user spring.datasource.password=password spring.jpa.show-sql=true spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect spring.jpa.open-in-view=true spring.jpa.hibernate.ddl-auto=create spring.jpa.database=mysql logging.level.org.hibernate.SQL=DEBUG

此配置的连接错误是什么？