# ---- 构建阶段 ----
FROM maven:3.9-eclipse-temurin-17 AS build
WORKDIR /app
COPY pom.xml .
# 先下载依赖，利用 Docker 缓存层
RUN mvn dependency:go-offline -q
COPY src ./src
RUN mvn package -DskipTests -q

# ---- 运行阶段 ----
FROM eclipse-temurin:17-jre-jammy
WORKDIR /app
COPY --from=build /app/target/*.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "app.jar"]
