JPA应用程序在哪里放置META-INF文件夹

Question

The title pretty much sums it up, where would I put the META-INF directory, this is the directory that needs to include the persistence.xml file. My first guess is in the root of my application as a sibling folder of "Source Packages". Thanks in advance! PS - Using a Maven project structure...

Screenshot of my current setup:

Answer 1

需要将META-INF文件夹放在类路径的根目录下，这可以通过将其作为源文件夹的直接子目录来实现。

Answer 2

It depends on where your managed classes are. In an EAR, you would probably put it into the root of the domain JAR. In a web application (WAR), a common location is the WEB-INF/classes folder, so your final structure would look like this:

WEB-INF/classes/META-INF/persistence.xml

This is convenient, since all your classes would be processed by the persistence provider.

Answer 3

Is your projected structured as shown on Introduction to the Standard Directory Layout

Configuration files (like hibernate.xml) should be placed in /src/main/resources In the "packaging" stage of maven, the files will automatically be placed in the correct META-INF directory