java - 使用 netbeans 使用 Restful Web 服务时，http ://xmlns. jcp.org/xml/ns/persistence":persistence-unit}' 是预期错误

Question

我正在使用 jersey 部署一个 Restful Web 服务。我正在阅读本教程并执行说明: http://www.oracle.com/webfolder/technetwork/tutorials/obe/java/RESTfulWebServices/RESTfulWebservices.htm

但是我在服务器上部署时遇到此错误。

Severe: Exception while deploying the app [PlayerServer2] : org.xml.sax.SAXParseException; lineNumber: 5; columnNumber: 15; Deployment descriptor file META-INF/persistence.xml in archive [classes]. cvc-complex-type.2.4.b: The content of element 'persistence' is not complete. One of '{"http://xmlns.jcp.org/xml/ns/persistence":persistence-unit}' is expected.

我使用的是 netbean 8.0.1、glassfish 服务器 4.1、JDK 1.8.91、JPA 2.1

编辑:

持久性.xml

<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="PlayerServer2PU" transaction-type="JTA">
    <jta-data-source>jdbc/playerdb2</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties/>
  </persistence-unit>
</persistence>

Answer 1

请删除空的<properties/>标签顺序为persistence.xml文件才能正确处理。