centos7.4 部署flask项目之 openjdk
openjdk
因为项目涉及到spark-hadoop-es,需要jdk
jdk 1.7 版本项目报错:
Exception in thread “main” java.lang.UnsupportedClassVersionError: org/apache/spark/launcher/Main : Unsupported major.minor version 52.0
openjdk的基本常用使用命令
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java -version
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yum search java | grep jdk
查看版本信息
yum search java-1.8
yum search java-1.7
查看1.7版本的
yum -y install java-1.8.0-openjdk.x86_64
java -version
此时,此时 yum search java-1.8 显示
java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk.i686 : OpenJDK Runtime Environment
java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector
java-1.8.0-openjdk-accessibility.i686 : OpenJDK accessibility connector
java-1.8.0-openjdk-accessibility-debug.i686 : OpenJDK accessibility connector for packages with debug on
java-1.8.0-openjdk-accessibility-debug.x86_64 : OpenJDK accessibility connector for packages with debug on
java-1.8.0-openjdk-debug.i686 : OpenJDK Runtime Environment with full debug on
java-1.8.0-openjdk-debug.x86_64 : OpenJDK Runtime Environment with full debug on
java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.8.0-openjdk-demo.i686 : OpenJDK Demos
java-1.8.0-openjdk-demo-debug.i686 : OpenJDK Demos with full debug on
java-1.8.0-openjdk-demo-debug.x86_64 : OpenJDK Demos with full debug on
java-1.8.0-openjdk-devel.