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idea导入JAR包1.点击 File -> Project Structure（或者快捷键 Ctrl + Alt + Shift + s）；2.点击Project Structure -> “Modules”；3.“在Dependencies” 标签界面下；4.点击右边绿色的 “+”号；5.选择第一个选项“JARs or directories…”；6.选择相应的jar...

一、错误提示javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in <forEach> at org.apache.taglibs.standard.tag.common.core.ForEachSupport.toForEachIterator(ForEachSup...

一、错误信息在Idea中使用jstl标签时候经常出现500错误，错误信息：The absolute uri: [http://java.sun.com/jsp/jstl/core] cannot be resolved in either web.xml or the jar files deployed with this application二、错误原因jstl1.2包中就不需要在用...