我为webapp使用springboot,我试图设置一个外部目录,它将容纳最终用户可以选择使用的各种JDBC驱动程序。要做到这一点,我补充说:SpringBoot loader.path无法加载外部罐子
loader.path=/opt/myapp/lib/
我application.properties文件,这是由PropertySourcesPropertyResolver
2016-04-28 17:27:38.739 DEBUG 22539 --- [restartedMain] o.s.c.e.PropertySourcesPropertyResolver : Found key 'loader.path' in [applicationConfigurationProperties] with type [String] and value '/opt/myapp/lib/'
我的问题是,我似乎无法加载任何JDBC驱动程序回升我放入这个目录的任何罐子,我错过了什么?我正在使用默认的嵌入式tomcat服务器。当我尝试使用Class.forName加载驱动程序时,我得到以下内容,例如该目录中不存在罐子。
public Connection buildConnection(DataSource dataSource) throws ClassNotFoundException, SQLException {
if (dataSource == null) {
throw new NullPointerException("Data Source is null!");
}
if (!dataSource.isReady()) {
throw new IllegalArgumentException("Data Source is reporting that it is not ready!");
}
logger.debug("Loading JDBC Driver: {}", dataSource.getDriverClass());
Class.forName(dataSource.getDriverClass());
logger.debug("Loaded Driver: {}", dataSource.getDriverClass());
logger.debug("Attempting to build connection using: {}", dataSource.getConnectionString());
DriverManager.setLoginTimeout(10);
Connection c = DriverManager.getConnection(dataSource.getConnectionString(), dataSource.getUserName(), dataSource.getPassword());
if (c != null) {
c.setAutoCommit(true);
c.setReadOnly(true);
return c;
}
throw new NullPointerException("Unable to create connection!");
}
这是异常被抛出
2016-04-28 17:38:53.525 DEBUG 22539 --- [nio-8081-exec-5] c.c.reportout.processor.JobProcessor : Loading JDBC Driver: com.mysql.jdbc.Driver
2016-04-28 17:38:53.526 WARN 22539 --- [nio-8081-exec-5] c.c.reportout.processor.JobProcessor : Unable to successfully test connection: com.mysql.jdbc.Driver
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_91]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_91]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_91]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91]
at org.springframework.boot.devtools.restart.classloader.RestartClassLoader.loadClass(RestartClassLoader.java:151) ~[spring-boot-devtools-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91]
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_91]
at java.lang.Class.forName(Class.java:264) ~[na:1.8.0_91]
任何指针,我怎么能调试这还是我在做什么错?
感谢
您是如何构建和打包应用程序的? 'loader.path'只有在使用'PropertiesLauncher'时才有效果。 –
是的,我做过。我只是构建了jar并使用java -jar MyApp-1.0-SNAPSHOT.jar运行它,并获得了相同的结果。 – csyperski
如果我将jdbc驱动程序依赖项添加到我的pom中,它显然可以工作,但由于某种原因我无法从外部目录加载它。 – csyperski