Unsupported major.minor version 52.0

 背景：

Unsupported major.minor version 52.0 是jdk的緣由

 java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver確實由於mysql-connector-java這個jar包的版本和tomcat版本不兼容致使的。

一、jdk7+老版5.0驅動com/mysql/jdbc/Driver 
二、jdk8+新版6.0驅動com/mysql/cj/jdbc/Driver

 

錯誤信息

 Got unchecked and undeclared exception which called by 10.9.49.87. service: com.jd.jr.fintech.megrez.loan.core.api.preloan.facade.CrlCreditResultQueryFacade, method: queryCreditResult, exception: java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0 (unable to load class com.mysql.jdbc.Driver), dubbo version: 2.4.10.3-wy, current host: 10.9.49.87
java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0 (unable to load class com.mysql.jdbc.Driver)

 定位過程：（要找到出錯的具體位置）

direct模塊有錯誤 實際上是core模塊的錯誤

core模塊中的mysql-connector-java 配置版本太高形成的