diff --git a/Dockerfile b/Dockerfile
index efd3aba..95effa4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,8 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         ca-certificates \
-        tar && \
+        tar \
+        openjdk-17-jre-headless && \
     curl -L \
       https://mirrors.tuna.tsinghua.edu.cn/apache/spark/spark-${SPARK_VERSION}/spark-${SPARK_VERSION}-bin-hadoop3.tgz \
       -o /tmp/spark.tgz && \
@@ -29,8 +30,9 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
+ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
 ENV SPARK_HOME=/opt/spark
-ENV PATH=${SPARK_HOME}/bin:${PATH}
+ENV PATH=${JAVA_HOME}/bin:${SPARK_HOME}/bin:${PATH}
 
 # Hadoop/Yarn 配置目录（运行时挂载）
 RUN mkdir -p /etc/hadoop/conf