我将jsp处理xml必须的两个库文件放在了tomcat的lib文件夹下面:
- xalan.jar
- xercesImpl.jar启动tomcat时遇到如下警告消息:
Jul 17, 2020 4:48:18 PM org.apache.tomcat.util.scan.StandardJarScanner processURLs WARNING: Failed to scan [file:/C:/MyApp/apache-tomcat-9.0.29/lib/serializer.jar] from classloader hierarchy java.io.FileNotFoundException: C:\MyApp\apache-tomcat-9.0.29\lib\serializer.jar (The system cannot find the file specified) at java.util.zip.ZipFile.open(Native Method) at java.util.zip.ZipFile.<init>(ZipFile.java:219) at java.util.zip.ZipFile.<init>(ZipFile.java:149) at java.util.jar.JarFile.<init>(JarFile.java:166) at java.util.jar.JarFile.<init>(JarFile.java:130) at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:177) at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65) at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49) at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:374) at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:309) at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:266) at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:229) at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:1968) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1128) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:774) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:301) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5051) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.startup.Catalina.start(Catalina.java:633) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)
我在下载xalan.jar的压缩包里找到了StandardJarScanner processURLs寻找的serializer.jar:
http://xml.apache.org/xalan-j/index.html把它复制到tomcat安装文件夹的lib下面,问题解决了。