Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 7; 不允许有匹配 "[xX][mM][lL]" 的...

控制台信息：

五月 23, 2018 11:18:05 上午 org.apache.catalina.core.ApplicationContext log
信息: No Spring WebApplicationInitializer types detected on classpath
Failed to auto configure default logger context
Reported exception:
ch.qos.logback.core.joran.spi.JoranException: Problem parsing XML document. See previously reported errors.
    at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:67)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:134)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:99)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:49)
    at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:77)
    at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:152)
    at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85)
    at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:55)
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:141)
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:120)
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:331)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:283)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:273)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:302)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5118)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5634)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 7; 不允许有匹配 "[xX][mM][lL]" 的处理指令目标。
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1239)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:648)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:332)
    at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:61)

关键信息：

Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 7; 不允许有匹配 "[xX][mM][lL]" 的处理指令目标。

• 此处的意思是在xml文件的第一行出现语法错误

解决办法

1、找到xml的第一行信息

可以看出第一行中前面有个空格，这是导致出现以上错误的原因。

_

2、把前缀的空格删除，重启服务器，此时应该解决了这个问题~