问题描述
我已经通过phpMyAdmin在MySQL中创建了一个数据库和表.我正在尝试使用数据库中的Entity类将其连接到我的项目.但是，在运行项目时出现以下错误:
I have created a database and table in MySQL through phpMyAdmin. I am trying to connect this to my project using Entity class from database. However I get the following error when I run my project:
Caused by: com.sun.appserv.connectors.internal.api.ConnectorRuntimeException: Invalid resource : java:module/companyDB__pm
我已经搜索了几个小时，似乎很多人都遇到了类似的问题，但是我无法按照提供的步骤来解决.例如，我尝试按照以下步骤操作: http: //www.nagazuka.nl/2014/03/invalid-resource-with-netbeans-8_27.html 但没有帮助.我试图在我的glassfish-resources.xml和persistence.xml中进行更改，但是没有任何效果.任何帮助，请感激！
I have searched for hours and it seems lots of people have a similar problem however I have not been able to solve it following the steps provided. For example I tried to follow the steps here: http://www.nagazuka.nl/2014/03/invalid-resource-with-netbeans-8_27.htmlbut has not helped. I have tried making changes in my glassfish-resources.xml and persistence.xml but nothing is working.Any help is appreciated please!
推荐答案
此错误Invalid resource : java:module/companyDB__pm表示您的JNDI不存在于您的服务器中，因此要解决您的问题，您必须使用以下方法在GlassFish服务器中手动创建一个JNDI同名companyDB
This error Invalid resource : java:module/companyDB__pm mean that your JNDI is not exist in your server, so to solve your problem you have to create a JNDI in your GlassFish server manually with the same name companyDB
例如:
登录到服务器后，您将看到:
After login to your server you will see this :
创建JDBC连接池
填写信息，然后按下一步，我正在使用PostgresSQL，因此在您的情况下选择MySQL:
Fill information and press next i'm using PostgresSQL so in your case choose MySQL :
填写连接信息，然后按完成:
Fill the connection information and press finish :
要检查您的连接是否成功，请按ping并检查:
To check if your connecton is succes of not press ping and check :
现在创建JDBC资源:
Now create JDBC Ressources :
创建一个新的JNDI，在您的应用程序中指定相同的名称，并选择之前已经创建它的池，然后按Finish:
Create a new JNDI specify the same name in your application and choose the pool that you already create it before and press finish :
现在您可以部署应用程序了，希望对您有所帮助.
Now you can deploy your application, hope this can help you.
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