Could not open JPA EntityManager for transaction; nested exception is java.lang.NullPointerException
2014-10-14 15:07
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<persistence-unit name="WebofficeOne" transaction-type="JTA ">
改为
<persistence-unit name="WebofficeOne" transaction-type="RESOURCE_LOCAL">
JTA 在jee环境下运行
RESOURCE_LOCAL在jse环境下使用
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