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java - 不支持的 major.minor 版本 52.0 错误

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我有在 JDK 1.8 上编译的代码。我创建了 war 文件并将其部署在运行 JRE 1.8 的 Ubuntu 服务器中的 Tomcat8 上。打开主页时出现此错误:

java.lang.UnsupportedClassVersionError: com/dash/io/web/bind/HomeCtrl : Unsupported major.minor version 52.0

$ java -versionjava version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

$ javac -version
javac 1.8.0_45

$ echo $JRE_HOME
/usr/local/java/jdk1.8.0_45/jre

$ /usr/local/apache-tomcat-8.0.22/bin/catalina.sh version
Using CATALINA_BASE: /usr/local/apache-tomcat-8.0.22
Using CATALINA_HOME: /usr/local/apache-tomcat-8.0.22
Using CATALINA_TMPDIR: /usr/local/apache-tomcat-8.0.22/temp
Using JRE_HOME: /usr/local/java/jdk1.8.0_45/jre
Using CLASSPATH: /usr/local/apache-tomcat-8.0.22/bin/bootstrap.jar:/usr/local/apache-tomcat-8.0.22/bin/tomcat-juli.jar
Server version: Apache Tomcat/8.0.22
Server built: Apr 29 2015 11:46:15 UTC
Server number: 8.0.22.0
OS Name: Linux
OS Version: 3.13.0-52-generic
Architecture: amd64
JVM Version: 1.8.0_45-b14
JVM Vendor: Oracle Corporation

需要帮助。谢谢。

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