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JPA简介
PA用于整合现有的ORM技术,可以简化现有Java EE和Java SE应用的对象持久化的开发工作,实现ORM的统一。JPA作为一项对象持久化的标准,不但可以获得Java EE应用服务器的支持,还可以直接在Java SE中使用。JPA必将成为Java持久化解决方案的主流,如果你是Hibernate或者TopLink的等ORM技术的忠实用户,不管你是否情愿,你迟早也得使用JPA,
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原文地址:https://www.cnblogs.com/luleiitlife/p/8545131.html
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报错:The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path
报错:Server Tomcat v7.0 Server at localhost was unable to start within 45 seconds. If the server requires more time, try increasing the timeout in the server editor.
报错:redis.clients.jedis.exceptions.JedisDataException: MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disable
报错:- cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'dubbo:application'.
报错:Referenced file contains errors (file:/Users/acui/apache-maven-3.5.4/dubbo.xsd). For more information, right click on the message in the Problems View and select "Show Details..."
报错:The Apache Tomcat installation at this directory is version 8.5.27. A Tomcat 8.0 installation is expected.
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