如何在開發環境中使用maven-docker以避免重複下載jar？

Question

這是我的Dockerfile，但是如果我改了java代碼，然後輸入「docker-compose up -d --build」到終端，maven會重新下載jar，如何避免重複下載？

Dockerfile：

FROM maven:3.5.0-jdk-8 
WORKDIR /app 
COPY pom.xml . 
COPY src ./src 
RUN mvn verify 
ENTRYPOINT ["java","-jar","target/cloud-user.jar"] 

泊塢窗，compose.yml：

version: "2" 
services: 
    cloud-nginx: 
    build: cloud-nginx 
    image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-nginx 
    restart: always 
    ports: ["80:80"] 
    cloud-consul: 
    image: consul:0.9.2 
    command: consul agent -dev -client 0.0.0.0 
    cloud-front: 
    build: cloud-front 
    image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-front 
    restart: always 
    volumes: 
     - ./cloud-front/static:/app 
    cloud-user: 
    build: cloud-user 
    image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-user 
    restart: always 
    mysql: 
    image: mysql:5.7.19 
    hostname: mysql 
    volumes: 
     - ./docker/mysql/data:/var/lib/mysql 
     - ./docker/mysql/conf:/etc/mysql/conf.d 
     - /etc/localtime:/etc/localtime 
    ulimits: 
     nproc: 65535 
    mem_limit: 1024m 
    restart: always 
    environment: 
     MYSQL_ROOT_PASSWORD: root 
    ports: 
     - "3306:3306" 

---

我簡化我的測試項目，然後用彈簧啓動插件行家

mvn spring-boot：運行

要啓動項目，現在先掛載.m2文件夾，然後運行mvn命令。 但是我更改了java源代碼後，它不會自動加載devtools，如何解決？

，這是我Dockerfile /泊塢窗-compose.yml：

Dockerfile：

version: "2" 
services: 
    user: 
    build: user 
    volumes: 
     - $HOME/.m2/repository:/root/.m2/repository 
     - ./user/src:/app/src 
    ports: 
     - "8080:8080" 

泊塢窗，compose.yml：

FROM maven:3.5.0-jdk-8 
WORKDIR /app 
COPY pom.xml . 
COPY src ./src 
ENTRYPOINT ["mvn","spring-boot:run"] 

Answer 1

解決，我的目標文件夾安裝到容器，它可以自動加載，這是最終的dockerfile和docker-compose.yml，當然在生產環境中我們不能寫：

Dockerfile：

FROM maven:3.5.0-jdk-8 
WORKDIR /app 
COPY pom.xml . 
COPY src ./src 
ENTRYPOINT ["mvn","spring-boot:run"] 

泊塢窗，compose.yml

version: "2" 
services: 
    user: 
    build: user 
    volumes: 
     - $HOME/.m2/repository:/root/.m2/repository 
     - ./user/target:/app/target 
    ports: 
     - "8080:8080" 
     - "5005:5005" 

的pom.xml：

<plugins> 
     <plugin> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-maven-plugin</artifactId> 
     <configuration> 
      <mainClass>cn.codeforfun.Application</mainClass> 
      <jvmArguments>-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005</jvmArguments> 
     </configuration> 
     </plugin> 
    </plugins>