我不知道我做错了什么,但我不能包括JSTL.我有jstl-1.2.jar,但不幸的是我得到了例外:
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:116)
at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:315)
at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:148)
at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:429)
at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:492)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1439)
at org.apache.jasper.compiler.Parser.parse(Parser.java:137)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:255)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:170)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:332)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
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:191)
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:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) …我有这个奇怪的问题使我的项目Maven为基础.我在Eclipse中创建了一个新的Maven项目并启用了Dynamic Web方面.但是在运行时现在它会抛出ClassNotFoundException因为Maven依赖项没有复制到WEB-INF/lib目录.我甚至尝试在POM中添加copy-dependencies部分,但它没有帮助.
有人在这里似乎已经解决了这个正确的方式,但我猜他忘了提解决方案::(
我有一个Spring Boot WAR应用程序在AWS上的Tomcat 8.0.39下完美地工作.发出后sudo service tomcat8 stop,升级到Tomcat 8.0.41 sudo yum update,然后重新启动实例,应用程序无法启动.在catalina日志文件中,我看到了大量类型的异常:
19-Feb-2017 10:27:15.326 WARNING [localhost-startStop-1] org.apache.tomcat.util.
scan.StandardJarScanner.scan Failed to scan [file:/usr/share/java/tomcat8/javax.
annotation-api.jar] from classloader hierarchy
java.io.FileNotFoundException: /usr/share/java/tomcat8/javax.annotation-api.jar
(No such file or directory)
以下是Tomcat抱怨的文件:
javax.annotation-api.jar
jsr181-api.jar
jaxb-api.jar
javax.xml.soap-api.jar
FastInfoset.jar
mimepull.jar
saaj-impl.jar
stax2-api.jar
woodstox-core-asl.jar
jaxb-core-2.2.10-b140802.1033.jar
jaxb-api-2.2.12-b140109.1041.jar
istack-commons-runtime-2.19.jar
txw2-2.2.10-b140802.1033.jar
hk2-core.jar
class-model.jar
config.jar
auto-depends.jar
javax.inject.jar
hk2-api.jar
osgi-resource-locator.jar
tiger-types.jar
bean-validator.jar
jtype.jar
对于如何解决这个问题,有任何的建议吗？
更新#1:
上面的一些文件属于jaxws-ri.事实证明,我将JAX-WS RI 2.2.10 lib目录中的一些(10)但不是全部(23)的jar 复制到Tomcat的lib目录中.在复制丢失的13个罐子之后,Tomcat在catalina日志文件中抱怨的文件列表缩小为:
jaxb-core-2.2.10-b140802.1033.jar
jaxb-api-2.2.12-b140109.1041.jar
istack-commons-runtime-2.19.jar
txw2-2.2.10-b140802.1033.jar
hk2-core.jar
class-model.jar
config.jar
auto-depends.jar
javax.inject.jar …在servlet中，我设置了会话值
HttpSession session = httpRequest.getSession();
session.setAttribute("user", "adam");
然后，在JSP页面上，当我尝试获取值时<c:out value="${user}"></c:out>，出现错误According to TLD or attribute directive in tag file, attribute value does not accept any expressions
那么如何获取session变量呢？
我们有一个依赖项 (JAR)，它包含一个引用其Class-Path条目中其他 JAR 的清单文件。应用程序不需要这些引用的其他 JAR，因此不会添加为依赖项。
当应用程序启动时，tomcat 尝试解析该类路径条目，最终会在日志中出现大量错误。喜欢：
The Class-Path manifest attribute in /Users/me/.m2/repository/org/bytedeco/javacpp-presets/openblas/0.3.3-1.4.3/openblas-0.3.3-1.4.3.jar referenced one or more files that do not exist: file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/openblas/0.3.3-1.4.3/javacpp.jar
The Class-Path manifest attribute in /Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-platform-2019.0-1.4.3.jar referenced one or more files that do not exist: file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-linux-x86.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-linux-x86_64.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-macosx-x86_64.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-windows-x86.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-windows-x86_64.jar
The Class-Path manifest attribute in /Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl/2019.0-1.4.3/mkl-2019.0-1.4.3.jar referenced one or more files that do not exist: file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl/2019.0-1.4.3/javacpp.jar
The Class-Path manifest attribute in /Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-dnn-platform/0.16-1.4.3/mkl-dnn-platform-0.16-1.4.3.jar referenced one or more files that do not exist: file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-dnn-platform/0.16-1.4.3/mkl-dnn.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-dnn-platform/0.16-1.4.3/mkl-dnn-linux-x86_64.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-dnn-platform/0.16-1.4.3/mkl-dnn-macosx-x86_64.jar,file:/Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-dnn-platform/0.16-1.4.3/mkl-dnn-windows-x86_64.jar
The Class-Path manifest attribute in /Users/me/.m2/repository/org/bytedeco/javacpp-presets/mkl-platform/2019.0-1.4.3/mkl-platform-2019.0-1.4.3.jar referenced …