我下面的Netbeans网站的教程:无法获得连接,数据源无效 - Netbeans的,MySQL的
https://netbeans.org/kb/docs/web/mysql-webapp.html
一切工作正常,直到这一步:实现JSTL代码步骤4,清单应显示我收到以下错误:
javax.servlet.ServletException: javax.servlet.jsp.JspException:
Unable to get connection, DataSource invalid: "java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused."
root cause
javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException :
Error connecting to server localhost on port 1527 with message Connection refused."
注意异常的完整堆栈跟踪和其根源是在GlassFish Server开源版4.0日志可用。
我想NetBeans仍会尝试连接到Derby DB。我如何将其更改为MySQL DB? 我使用Java EE7,MySQL和NetBeans中,Glassfish的4
您需要按照上面链接的NetBeans教程中的所有说明操作。它链接到一个关于连接到MySql的教程(https://netbeans.org/kb/docs/ide/mysql.html),并且这些指令详细说明了如何使用现有JDBC连接来创建应用程序中使用的JDBC资源。 –