不好意思，图片的异常可能看不清：ERROR [17:33:47] [http-8080-1] com.jfinal.core.ActionHandler.handle(123) | /login?username=admin1001&pwd=deppon%26yusys2&_=1542101627791
com.jfinal.plugin.activerecord.ActiveRecordException: java.lang.NullPointerException
at com.jfinal.plugin.activerecord.Db.find(Db.java:361)
at com.jfinal.plugin.activerecord.Db.findFirst(Db.java:409)
at net.bolus.controller.WebadminController.login(WebadminController.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.jfinal.core.ActionInvocation.invoke(ActionInvocation.java:55)
at com.jfinal.core.ActionHandler.handle(ActionHandler.java:77)
at com.jfinal.ext.handler.ContextPathHandler.handle(ContextPathHandler.java:47)
at com.jfinal.plugin.druid.DruidStatViewHandler.handle(DruidStatViewHandler.java:74)
at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at com.jfinal.plugin.activerecord.DbKit.getConnection(DbKit.java:129)
at com.jfinal.plugin.activerecord.Db.find(Db.java:358)

windows本地可以正常访问数据库, 说明代码没问题.
数据库在linux端, 也就是说不是防火墙的问题, 那一般就是用户名和密码不对了.
远程测试你的账户密码 正确性, 你可以使用如Navicat的SSH进行连接你linux端的数据库, 详细教程可网络搜索.
这样一步一步排除, 就可以找到你的问题

@杜福忠 很可能是数据库连不上， 多数是用户名密码错误，或者 localhost 连不上，要配置权限