将 META-INF/context.xml 的内容移动到 tomcat/conf
我们试图从 war 文件中取出环境特定的配置设置，这样我们就可以将相同的 war 文件部署到 dev/test/prod tomcat 服务器，而不必更改 war 配置文件的内容。
当我将数据库连接的 META-INF/context.xml 移动到 conf/server.xml 时，数据库连接不再工作，出现以下错误，有人知道为什么会这样吗？
server.xml：
<GlobalNamingResources>
....
<Resource
url="jdbc:oracle:thin:@hostname:1521/something"
username="username"
name="jdbc/mydb"
password="password"
auth="Container"
driverClassName="oracle.jdbc.driver.OracleDriver"
maxActive="5" maxIdle="2" maxWait="10000"
removeAbandoned="true"
type="javax.sql.DataSource"
/>
</GlobalNamingResources>
错误如下：（
INFO: Deploying web application directory ROOT
Problem reading system configuration. Cannot create JDBC driver of class '' for connect URL 'null' (java.io.IOException: Cannot create JDBC driver of class '' for connect URL 'null')
java.io.IOException: Cannot create JDBC driver of class '' for connect URL 'null'
at au.edu.unimelb.helper.SettingManager.loadSettings(SettingManager.java:212)
at au.edu.unimelb.helper.SettingManager.<init>(SettingManager.java:53)
是的，odjbc6.jar 文件位于 $TOMCAT_HOME/lib/ 中）
We are trying to take the environment specific configuration settings out of our war files, so we can deploy the same war file to dev/test/prod tomcat servers and not have to change the contents of the war config file.
When I move the META-INF/context.xml for the database connection to the conf/server.xml the database connection no longer works, with the following error, anyone know why this would be?
server.xml:
<GlobalNamingResources>
....
<Resource
url="jdbc:oracle:thin:@hostname:1521/something"
username="username"
name="jdbc/mydb"
password="password"
auth="Container"
driverClassName="oracle.jdbc.driver.OracleDriver"
maxActive="5" maxIdle="2" maxWait="10000"
removeAbandoned="true"
type="javax.sql.DataSource"
/>
</GlobalNamingResources>
The error is as follows:
INFO: Deploying web application directory ROOT
Problem reading system configuration. Cannot create JDBC driver of class '' for connect URL 'null' (java.io.IOException: Cannot create JDBC driver of class '' for connect URL 'null')
java.io.IOException: Cannot create JDBC driver of class '' for connect URL 'null'
at au.edu.unimelb.helper.SettingManager.loadSettings(SettingManager.java:212)
at au.edu.unimelb.helper.SettingManager.<init>(SettingManager.java:53)
(And yes the odjbc6.jar file is in $TOMCAT_HOME/lib/)
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终于解决了，tomcat文档有点误导。您可以将
META-INF/context.xml的内容直接放入$TOMCAT_HOME/conf/context.xml中，它就可以正常工作。Finally worked it out, the tomcat documentation was slightly misleading. You can put the contents of your
META-INF/context.xmlstraight into$TOMCAT_HOME/conf/context.xmland it works just fine.context.xml 中可能缺少
META-INF/context.xml或$TOMCAT_HOME/conf/ 中） context.xml，如下所示：There might be missing a
<ResourceLink>in context.xml (either in the web application'sMETA-INF/context.xmlor in$TOMCAT_HOME/conf/context.xml, like so: