2018-01-31 10:40

@JFinal 好的，多谢波总

Db.findFirst为什么要先查询出所有记录再取第一条，而不是在语句后加limit或top来实现，这样在大数据量情况下不会影响效率吗

2018-01-30 15:34

2017-12-28 15:10

@JFinal 我在用一个服务器上运行的，配置是相同的

JFinal ehcache 获取主机名失败

2017-12-28 14:55

@JFinal [ERROR]-[Thread: ajp-bio-8009-exec-9]-[net.sf.ehcache.Cache.()]: Unable to set localhost. This prevents creation of a GUID. Cause was: XXX: XXX: 未知的名称或服务
java.net.UnknownHostException: XXX: XXX: 未知的名称或服务
at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
at net.sf.ehcache.Cache.(Cache.java:214)
at net.sf.ehcache.config.ConfigurationHelper.createCache(ConfigurationHelper.java:296)
at net.sf.ehcache.config.ConfigurationHelper.createCaches(ConfigurationHelper.java:234)
at net.sf.ehcache.CacheManager.addConfiguredCaches(CacheManager.java:755)
at net.sf.ehcache.CacheManager.doInit(CacheManager.java:459)
at net.sf.ehcache.CacheManager.init(CacheManager.java:377)
at net.sf.ehcache.CacheManager.(CacheManager.java:259)
at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:1037)
at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:818)
at net.sf.ehcache.CacheManager.create(CacheManager.java:799)
at com.jfinal.plugin.ehcache.EhCachePlugin.createCacheManager(EhCachePlugin.java:90)
at com.jfinal.plugin.ehcache.EhCachePlugin.start(EhCachePlugin.java:61)
at com.jfinal.core.Config.startPlugins(Config.java:107)
at com.jfinal.core.Config.configJFinal(Config.java:51)
at com.jfinal.core.JFinal.init(JFinal.java:63)
at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:49)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:105)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4809)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5485)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1256)
at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:692)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:217)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:193)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.net.UnknownHostException: XXX: 未知的名称或服务
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
... 52 more
主机名确实在hosts中未设置 但我的问题是为什么spring没有报错 而jfinal会

JFinal ehcache 获取主机名失败

2017-12-28 13:43