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错误日志：
java.io.FileNotFoundException: Could not resolve XML resource [null] with public ID [null], system ID [classes/xxx.xml] and base URI [file:/home/xxx/apache-tomcat-8.5.11/webapps/bbbb/WEB-INF/web.xml] to a known, local entity.
解决方法：
vi conf/context.xml
在<Context>中添加属性xmlBlockExternal，具体如：
<Context xmlBlockExternal="false">
java.io.FileNotFoundException: Could not resolve XML resource [null] with public ID [null], system ID [classes/xxx.xml] and base URI [file:/home/xxx/apache-tomcat-8.5.11/webapps/bbbb/WEB-INF/web.xml] to a known, local entity.
解决方法：
vi conf/context.xml
在<Context>中添加属性xmlBlockExternal，具体如：
<Context xmlBlockExternal="false">