Question

当我尝试将mysql的端口号更改为9094而不是3306时，我有点错误。但是当我使用3306时，我可以得到它的数据。我很确定我将所有与Java Web App的端口连接从3306更改为9094但仍然有错误。

这是错误..

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException：通讯链接失败

这是我的jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:9094/hnlmnl_db
jdbc.username=infordev
jdbc.password=infordev

这是我的servlet

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="${jdbc.driverClassName}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
</bean>

但连接时仍然出错...

任何帮助？

谢谢！

这是调试信息

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is 
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)

org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: 
Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)

org.apache.commons.dbcp.SQLNestedException: Cannot create 
PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

java.net.ConnectException: Connection refused: connect

Answer 1

拒绝连接通常意味着没有服务正在侦听您尝试连接的服务器/端口：

检查MySQL服务是否正在运行。如果没有，请启动它。
检查是否实际正在侦听127.0.0.1:9094：
- 使用netstat -a，
- 使用命令行mysql工具或带有上述IP /端口的工作台
- 尝试使用telnet或netcat或类似工具连接到上面的IP /端口。

如果服务正在运行但没有侦听该IP /端口，那么您需要修复mysql服务器配置。查看文档。

如果服务正在运行并正在侦听该IP /端口，则表明存在网络问题;例如一些奇怪的防火墙。（您永远不需要在127.0.0.1上进行任何防火墙....）

当我更改端口号而不是3306时，无法连接到mysql

1 个答案: