1.问题描述 在Eclipse中使用java Application运行程序，出现下列错误 2.原因分析 使用的jdk或者jre中缺少tomcat-juli.jar包 3.解决方法 1.Window->Preferences->Java->Installed JREs2.选中jdk或者jre，然后点击Edit 3.选择 Add External JARs4.找到tomcat-juli.jar 包，点击打开（这个包在Tomcat的bin目录下） 5.添加成功后，点击完成参考文章 【1】https://blog.csdn.net/wangyonglin1123/article/details/89468898
java.lang.Exception: org.apache.http.conn.HttpHostConnectException: Connect to 172.24.1.227:80 [/172.24.1.227] failed: 拒绝连接 (Connection refused)at com.trs.util.HttpUtil.doPost(HttpUtil.java:197)at com.trs.util.HttpUtil.doPost(HttpUtil.java:154)at com.trs.service.AuthService.isAdministrator(AuthService.java:54)at com.trs.service.AuthService$$FastClassBySpringCGLIB$$8b3366ee.invoke(<generated>)a...
问题描述：Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/storm/topology/IRichSpout at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:123) Caused by: java.lang.ClassNotFoundException: org.apache.storm.topology.IRichSpout at java.net.URLClassLoader.findClass(URLClassLoader.ja...
缺少jar包 poi对应的zip文件中有如下文件：xmlbeans-2.6.0.jar Caused by: java.lang.NoClassDefFoundError: org/openxmlformats/schemas/drawingml/x2006/main/ThemeDocument 缺少jar包 poi-ooxml-schemas-3.12-20150511.jar
这个问题就是缺少jar包依赖！！！ java.lang.NoClassDefFoundError: org/apache/commons/beanutils/DynaBean 缺少commons-beanutils-1.8.0.jar java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap 缺少commons-collections.jar java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException缺少commons-lang-2.4.jarjava.lang.NoClassDefFoundError: org/apa...