我正在与詹金斯使用声纳插件。它总是产生此错误。看来插件找不到JDBC驱动程序。我尝试根据我在google中找到的许多解决方案将JDBC驱动程序放在许多可能的位置，但是它仍然会产生此错误。

C:\Jenkins\tools\hudson.plugins.sonar.SonarRunnerInstallation\sonar-runner-2.4
SonarQube Runner 2.4
Java 1.7.0_21 Oracle Corporation (32-bit)
Windows Server 2008 R2 6.1 x86
INFO: Runner configuration file: C:\Jenkins\tools\hudson.plugins.sonar.SonarRunnerInstallation\sonar-runner-2.4\conf\sonar-  runner.properties
INFO: Project configuration file: C:\Jenkins\jobs\check2\workspace\sonar-   project.properties
INFO: SonarQube Server 4.3.2
10:18:10.612 INFO  - Load batch settings
10:18:14.265 INFO  - User cache: C:\.sonar\cache
10:18:14.321 INFO  - Install plugins
10:18:18.941 INFO  - Install JDBC driver
10:18:18.971 INFO  - Create JDBC datasource for jdbc:mysql://localhost:3306/sonar
INFO: ------------------------------------------------------------------------
INFO: EXECUTION FAILURE
INFO: ------------------------------------------------------------------------
Total time: 22.884s
Final Memory: 3M/15M
INFO: ------------------------------------------------------------------------
ERROR: Error during Sonar runner execution
ERROR: Unable to execute Sonar
ERROR: Caused by: Fail to connect to database
ERROR: Caused by: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
ERROR: Caused by: com.mysql.jdbc.Driver
ERROR: 
ERROR: To see the full stack trace of the errors, re-run SonarQube Runner with the -e switch.
ERROR: Re-run SonarQube Runner using the -X switch to enable full debug logging.
Build step 'Invoke Standalone Sonar Analysis' marked build as failure
Finished: FAILURE