在IDEA中SSM專案開發中，

在TomCat部署ssm專案時，JSTL的錯誤

錯誤如下：

 1 org.apache.jasper.JasperException: 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
 2     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:55)
 3     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:277)
 4     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:75)
 5     org.apache.jasper.compiler.TagLibraryInfoImpl.generateTldResourcePath(TagLibraryInfoImpl.java:250)
 6     org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:125)
 7     org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:421)
 8     org.apache.jasper.compiler.Parser.parseDirective(Parser.java:479)
 9     org.apache.jasper.compiler.Parser.parseElements(Parser.java:1435)
10     org.apache.jasper.compiler.Parser.parse(Parser.java:139)
11     org.apache.jasper.compiler.ParserController.doParse(ParserController.java:227)
12     org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
13     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:201)
14     org.apache.jasper.compiler.Compiler.compile(Compiler.java:358)
15     org.apache.jasper.compiler.Compiler.compile(Compiler.java:338)
16     org.apache.jasper.compiler.Compiler.compile(Compiler.java:325)
17     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:580)
18     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363)
19     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
20     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
21     javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
22     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
23     org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:170)
24     org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314)
25     org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1325)
26     org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069)
27     org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008)
28     org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
29     org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
30     org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
31     javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
32     org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
33     javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
34     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
35     org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
36     org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解決辦法：

在如下的庫中找到箭頭指向的幾個檔案

在External Libraries--->Maven:jstl:jstl:版本號--->jstl-1.2.jar--->META-INF中

也就是

c.tld
fmt.tld
fn.tld
sql.tld
x.tld

把這幾個文件複製到如下箭頭指向的路徑中

然後重啟Tomcat一般即可解決該問題！！！