問題：當我們電腦上有一個maven項目時，再創建一個maven項目，就有可能引起jar包的衝突。
原因：maven本地倉庫已有原來下載好的jar包，新建的項目會使用之前的jar包，這時候第二個項目選擇的jar包就有可能與之前的衝突。
解決方法：1、將本地倉庫中的jar包刪除，重新加載。（前提是之前那個項目已不用，否則會報錯）
2、修改setting.xml本地倉庫的地址，本地建對應的目錄
報錯：（當然不僅限於以下錯誤）
一月 14, 2018 7:30:37 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:ssm-crud' did not find a matching property.一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server version: Apache Tomcat/9.0.1
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server built: Sep 27 2017 17:31:52 UTC
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server number: 9.0.1.0
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Name: Windows 10
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Version: 10.0
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Architecture: amd64
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Java Home: E:\Java-jdk\jdk1.8.0_131\jre
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Version: 1.8.0_131-b11
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Vendor: Oracle Corporation
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_BASE: E:\Eclipse\jee-oxygen\product\.metadata\.plugins\org.eclipse.wst.server.core\tmp2
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_HOME: E:\Tomcat\apache-tomcat-9.0.1-windows-x64\apache-tomcat-9.0.1
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.base=E:\Eclipse\jee-oxygen\product\.metadata\.plugins\org.eclipse.wst.server.core\tmp2
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.home=E:\Tomcat\apache-tomcat-9.0.1-windows-x64\apache-tomcat-9.0.1
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dwtp.deploy=E:\Eclipse\jee-oxygen\product\.metadata\.plugins\org.eclipse.wst.server.core\tmp2\wtpwebapps
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.endorsed.dirs=E:\Tomcat\apache-tomcat-9.0.1-windows-x64\apache-tomcat-9.0.1\endorsed
一月 14, 2018 7:30:37 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dfile.encoding=UTF-8
一月 14, 2018 7:30:37 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [E:\Java-jdk\jdk1.8.0_131\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;E:/Java-jdk/jdk1.8.0_131/bin/../jre/bin/server;E:/Java-jdk/jdk1.8.0_131/bin/../jre/bin;E:/Java-jdk/jdk1.8.0_131/bin/../jre/lib/amd64;.;E:\Java-jdk\jdk1.8.0_131\bin;E:\Gitbash\Git\cmd;E:\node.js\;E:\apache-maven-3.5.2-bin\apache-maven-3.5.2\bin;E:\apache-maven-3.5.2-bin\apache-maven-3.5.2;E:\Tomcat\apache-tomcat-7.0.82-windows-x64\apache-tomcat-7.0.82\binbin;%SHPLAYER%;E:\mysql-5.7.20-winx64\bin;C:\WINDOWS\System32\Wbem；;C:/Windows/System32;E:\mysql-5.7.20-winx64\bin;C:\Users\yao\AppData\Roaming\npm;%M2_HOME%\bin;E:\Eclipse\jee-oxygen\eclipse;;.]
一月 14, 2018 7:30:37 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-nio-8080"]
一月 14, 2018 7:30:38 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
信息: Using a shared selector for servlet write/read
一月 14, 2018 7:30:38 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-nio-8009"]
一月 14, 2018 7:30:38 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
信息: Using a shared selector for servlet write/read
一月 14, 2018 7:30:38 下午 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 2697 ms
一月 14, 2018 7:30:39 下午 org.apache.catalina.core.StandardService startInternal
信息: Starting service [Catalina]
一月 14, 2018 7:30:39 下午 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/9.0.1
一月 14, 2018 7:30:47 下午 org.apache.jasper.servlet.TldScanner scanJars
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
一月 14, 2018 7:30:47 下午 org.apache.catalina.core.ContainerBase startInternal
嚴重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to initialize component [org.apache.catalina.webresources.JarResourceSet@10f384a2]
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1425)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1415)
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:941)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:671)
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:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
Caused by: org.apache.catalina.LifecycleException: Failed to initialize component [org.apache.catalina.webresources.JarResourceSet@10f384a2]
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:139)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:173)
at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:724)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4758)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4893)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1425)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1415)
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:941)
... 21 more
Caused by: java.lang.IllegalArgumentException: java.util.zip.ZipException: invalid LOC header (bad signature)
at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.initInternal(AbstractSingleArchiveResourceSet.java:114)
at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
... 33 more
Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method)
at java.util.zip.ZipFile.access$1400(ZipFile.java:60)
at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:717)
at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:419)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
at sun.misc.IOUtils.readFully(IOUtils.java:65)
at java.util.jar.JarFile.getBytes(JarFile.java:425)
at java.util.jar.JarFile.getManifestFromReference(JarFile.java:193)
at java.util.jar.JarFile.getManifest(JarFile.java:180)
at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.initInternal(AbstractSingleArchiveResourceSet.java:112)
... 34 more
一月 14, 2018 7:30:47 下午 org.apache.catalina.core.ContainerBase startInternal
嚴重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: A child container failed during start
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:671)
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:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:956)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1425)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1415)
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:941)
... 13 more
一月 14, 2018 7:30:47 下午 org.apache.catalina.startup.Catalina start
嚴重: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:956)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:671)
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:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
一月 14, 2018 7:30:47 下午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["http-nio-8080"]
一月 14, 2018 7:30:47 下午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["ajp-nio-8009"]
一月 14, 2018 7:30:47 下午 org.apache.catalina.core.StandardService stopInternal
信息: Stopping service [Catalina]
一月 14, 2018 7:30:47 下午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["http-nio-8080"]
一月 14, 2018 7:30:47 下午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["ajp-nio-8009"]