在Eclipse Maven Project中找不到persistence.xml [英] persistence.xml not found in Eclipse Maven Project

问题描述

我无法修复 persistence.xml文件未找到 eclipse的问题，这是一个简单的测试项目（Maven Nature），用于非常基本的EJB测试，文件确实在src / main / resources / META-INF / ...这是pom.xml的内容。尝试将文件夹添加到项目的构建路径，更新maven项目。没有运气到目前为止，任何帮助将不胜感激，谢谢！

 < project xmlns =http：// maven。 apache.org/POM/4.0.0xmlns：xsi =http://www.w3.org/2001/XMLSchema-instancexsi：schemaLocation =http://maven.apache.org/POM/4.0。 0 http://maven.apache.org/xsd/maven-4.0.0.xsd\"> 
< modelVersion> 4.0.0< / modelVersion> 
< groupId> LibEE< / groupId> 
< artifactId> LibEE< / artifactId> 
< packaging> jar< / packaging> 
< version> 0.0.1-SNAPSHOT< / version> 
< build> 
< sourceDirectory> src< / sourceDirectory> 
< plugins> 
< plugin> 
< artifactId> maven-compiler-plugin< / artifactId> 
< version> 3.1< / version> 
< configuration> 
< source> 1.7< / source> 
< target> 1.7< / target> 
< / configuration> 
< / plugin> 
 
< plugin> 
< groupId> org.apache.maven.plugins< / groupId> 
< artifactId> maven-jar-plugin< / artifactId> 
< version> 2.2< / version> 
< configuration> 
< archive> 
< manifest> 
< mainClass> main.resources.Main< / mainClass> 
 
< / manifest> 
< / archive> 
< / configuration> 
< / plugin> 
< / plugins> 
< / build> 
 
<依赖关系> 
<依赖关系> 
< groupId> org.eclipse.persistence< / groupId> 
< artifactId> javax.persistence< / artifactId> 
< version> 2.1.0< / version> 
< / dependency> 
 
<依赖关系> 
< groupId> org.ow2.spec.ee< / groupId> 
< artifactId> ow2-ejb-3.0-spec< / artifactId> 
< version> 1.0.13< / version> 
< / dependency> 
 
<依赖关系> 
< groupId> org.glassfish.extras< / groupId> 
< artifactId> glassfish-embedded-all< / artifactId> 
< version> 3.0.1< / version> 
< scope> test< / scope> 
< / dependency> 
 
 
< / dependencies> 
< / project> 
  

这是persistence.xml：

 <？xml version =1.0encoding =UTF-8？> 
< persistence xmlns =http://java.sun.com/xml/ns/persistence
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance 
 xsi：schemaLocation =http://java.sun.com/xml/ns/persistence 
 http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd
 version =2.0> 
 
< persistence-unit name =LibEEtransaction-type =JTA> 
< provider> org.eclipse.persistence.jpa.PersistenceProvider< / provider> 
< jta-data-source> jdbc / LibEE< / jta-data-source> <！ - 指企业服务器中的数据源 - > 
< class> main.java.entities.Book< / class> 
<属性> 
< property name =eclipselink.ddl-generationvalue =drop-and-create-tables/> 
< property name =eclipselink.logging.levelvalue =INFO/> 
< / properties> 
 
 
< / persistence-unit> 
 
< / persistence> 
  

解决方案

persistence.xml文件必须添加到类路径解除了这个问题。

尝试如下：

1. 创建/更新目录src / main / resources / META-INF，place persistence.xml文件在这里




2. 运行Maven->更新项目配置




3. 通过在Eclipse IDE>属性> Java构建路径>源选项卡中右键单击项目，验证src / main / resources是否已添加到源文件夹（Java Resources）。您将在这里找到/ src / main / resources。




4. 选择Maven->更新项目配置或Project-> Clean




5. 如果您构建应用程序，请检查目标// WEB-INF / classes / META-INF / persistence.xml（或如何配置您的类路径）下的persistence.xml文件。 p>




6. 就是这样！

I cannot fix the persistence.xml file not found eclipse problem, this is a simple test project (Maven Nature) for a very basic EJB testing, the file is indeed in src/main/resources/META-INF/... this is the pom.xml contents. Tried adding the folder to the project's build path, updating maven project. No luck so far, any help would be greatly appreciated, thanks!

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>LibEE</groupId>
  <artifactId>LibEE</artifactId>
  <packaging>jar</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>

      <plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<configuration>
<archive>
<manifest>
<mainClass>main.resources.Main</mainClass>

</manifest>
</archive>
</configuration>
</plugin>
   </plugins>
  </build>

  <dependencies>
    <dependency>
    <groupId>org.eclipse.persistence</groupId>
    <artifactId>javax.persistence</artifactId>
    <version>2.1.0</version>
    </dependency>

     <dependency>
    <groupId>org.ow2.spec.ee</groupId>
    <artifactId>ow2-ejb-3.0-spec</artifactId>
    <version>1.0.13</version>
</dependency>

<dependency>
<groupId>org.glassfish.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.0.1</version>
<scope>test</scope>
</dependency>


  </dependencies>
</project>

And this is the persistence.xml:

    <?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">

<persistence-unit name="LibEE" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>jdbc/LibEE</jta-data-source> <!-- Refers to data source in Enterprise server -->
    <class>main.java.entities.Book</class>
<properties>
    <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
    <property name="eclipselink.logging.level" value="INFO"/>
</properties>


</persistence-unit>

</persistence>

解决方案

persistence.xml file MUST be added to the classpath to resovle this issue.

Try as following:

1. Create/Update a directory src/main/resources/META-INF, place persistence.xml file here

2. Run Maven->Update project configuration

3. Verify that src/main/resources was added to source folders (Java Resources) by Right click on your project in Eclipse IDE > Properties > Java Build Path > Source tab. You will found /src/main/resources here.

4. Select Maven->Update project configuration or Project->Clean

5. If you build your applicaiton, check for persistence.xml file under target//WEB-INF/classes/META-INF/persistence.xml (or how you have configured your classpath).

6. That's it!

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