那啥，最近在启动tomcat时候，startup.bat总是闪退，然后查看8080端口也没有占用 
 
 
 
 
 
上网查了资料，首先说的是编辑startup.bat最后加上pause 让他暂停看错误
 
但现实很残酷，加入之后，还是停不下来，只留下命令行中的这个玩意
 
然后 让你添加这个  
 
set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_211
 set JRE_HOME=C:\Program Files\Java\jre1.8.0_211
 
然而对我来说  没啥用
  
 
 
 
 
此刻的你一定很绝望，但是，坚持，于是，你突然发现可以去tomcat下的log中查看日志文件，so
 
你找到了他   
 
 
 
 Failed to start component [StandardServer[8005]]
 
然后解决办法出现了：打开tomcat下的server.xml  编辑最后又类似下面的数据，删除即可。
 
 
 
等等，别听上面的那个。。。往下看。。。我的故事
 
 
 
 
 
 
 
    <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
 
        <!-- SingleSignOn valve, share authentication between web applications
              Documentation at: /docs/config/valve.html -->
         <!--
         <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
         -->
 
        <!-- Access log processes all example.
              Documentation at: /docs/config/valve.html
              Note: The pattern used is equivalent to using pattern="common" -->
         <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" pattern="%h %l %u %t &quot;%r&quot; %s %b" prefix="localhost_access_log." suffix=".txt"/>
 
      <Context docBase="D:\tomcat7\apache-tomcat-7.0.94\webapps\wsdc-master" path="/wsdc" reloadable="true" source="org.eclipse.jst.jee.server:wsdc-master"/><Context docBase="D:\tomcat7\apache-tomcat-7.0.94\webapps\WirelessOrder" path="/WirelessOrder" reloadable="true" source="org.eclipse.jst.jee.server:WirelessOrder"/></Host>
 
然后我激动去打开startup.bat  果然，不出所料，正常启动了。然后访问localhost：8080    
 
 
 
 
 
？？？？？为什么404
 
好吧，我知道为什么网上查资料，下面有人评论说，楼主胡扯得了，因为会引发新的bug，艹艹，
 
然后我让小可爱给我传了一份server.xml 文件，代替原来的
 
so。 可以访问了   ，。。。。。
 
下面是tomcat7的配置文件（拜拜 ~~）
 
 
 
完整配置文件
 
<?xml version='1.0' encoding='utf-8'?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may not
     define subcomponents such as "Valves" at this level.
     Documentation at /docs/config/server.html
 -->
<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  <!-- Security listener. Documentation at /docs/config/listeners.html
  <Listener className="org.apache.catalina.security.SecurityListener" />
  -->
  <!--APR library loader. Documentation at /docs/apr.html -->
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
  <Listener className="org.apache.catalina.core.JasperListener" />
  <!-- Prevent memory leaks due to use of particular java/javax APIs-->
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

  <!-- Global JNDI resources
       Documentation at /docs/jndi-resources-howto.html
  -->
  <GlobalNamingResources>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users
    -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

  <!-- A "Service" is a collection of one or more "Connectors" that share
       a single "Container" Note:  A "Service" is not itself a "Container",
       so you may not define subcomponents such as "Valves" at this level.
       Documentation at /docs/config/service.html
   -->
  <Service name="Catalina">

    <!--The connectors can use a shared executor, you can define one or more named thread pools-->
    <!--
    <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
        maxThreads="150" minSpareThreads="4"/>
    -->


    <!-- A "Connector" represents an endpoint by which requests are received
         and responses are returned. Documentation at :
         Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
         Java AJP  Connector: /docs/config/ajp.html
         APR (HTTP/AJP) Connector: /docs/apr.html
         Define a non-SSL HTTP/1.1 Connector on port 8080
    -->
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <!-- A "Connector" using the shared thread pool-->
    <!--
    <Connector executor="tomcatThreadPool"
               port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    -->
    <!-- Define a SSL HTTP/1.1 Connector on port 8443
         This connector uses the BIO implementation that requires the JSSE
         style configuration. When using the APR/native implementation, the
         OpenSSL style configuration is required as described in the APR/native
         documentation -->
    <!--
    <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol"
               maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" />
    -->

    <!-- Define an AJP 1.3 Connector on port 8009 -->
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />


    <!-- An Engine represents the entry point (within Catalina) that processes
         every request.  The Engine implementation for Tomcat stand alone
         analyzes the HTTP headers included with the request, and passes them
         on to the appropriate Host (virtual host).
         Documentation at /docs/config/engine.html -->

    <!-- You should set jvmRoute to support load-balancing via AJP ie :
    <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
    -->
    <Engine name="Catalina" defaultHost="localhost">

      <!--For clustering, please take a look at documentation at:
          /docs/cluster-howto.html  (simple how to)
          /docs/config/cluster.html (reference documentation) -->
      <!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->

      <!-- Use the LockOutRealm to prevent attempts to guess user passwords
           via a brute-force attack -->
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <!-- This Realm uses the UserDatabase configured in the global JNDI
             resources under the key "UserDatabase".  Any edits
             that are performed against this UserDatabase are immediately
             available for use by the Realm.  -->
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

        <!-- SingleSignOn valve, share authentication between web applications
             Documentation at: /docs/config/valve.html -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
        -->

        <!-- Access log processes all example.
             Documentation at: /docs/config/valve.html
             Note: The pattern used is equivalent to using pattern="common" -->
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log." suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

      </Host>
    </Engine>
  </Service>
</Server>
 
 

编辑startup 在最后面加pause用来查看出了什么错误
出现以下问题错误解决方案
the JRE_HOME environment variable is not defined correctly 

This environment variableis needed to run this program


原因：以前版本的tomcat需要JDK，现在的tomcat（本人的是7.0）只要有JRE就可以。 如果你装的tomcat的是解压版的(免安装的)那么则需要自己手动配置JRE_HOME 这个环境变量，否则，就会出现上面的错误。

解决办法：右击 我的电脑 - 高级 - 环境变量， 在系统变量中 新建 
变量名：JRE_HOME  
变量值：C:\Program Files\Java\jre7（根据你自己的JDK安装目录寻找JRE）

零、问题背景
 
 
有时候在本地文件启动 startup 时，会一闪而过，正常情况，至少不会消失窗体。
 
而这时候如何定位错误呢？
 
 
首先不用说要去查看报错日志，根据日期来选择查看日志里面的运行记录。
 
而闪退的原因有以下情况可能出现……
 

一、残留项目链接
 
 
 
解决：链接清除。
 
 
 
 
根据自己的本地路径找到对应的文件 “server.xml” 文件打开，查找是否有旧的项目链接还存留，但本地已经删除了旧的项目，导致找不到旧项目所以闪退。大概在第二个图最下面的位置（Host 标签里次次）。
 
 
 
二、待更新...

第一步：
 
点击startup.bat会闪退，编辑startup.bat，在最后一行加入 pause ，然后保存，再次运行，就可以看到闪退的原因
 
 
可以看出我自己的原因是因为没有配置Java_home或者jre_home
 
 
第二步：
 
配置JAVA_HOME环境变量，右击此电脑，选择属性
 
 
第三步：
 
点击高级系统设置，
 
 
第四步：
 
点击环境变量
 
 
第五步：
 
点击新建
 
 
第六步：
 
命名为JAVA_HOME,变量值为jdk的存储地址，然后点击确定
 
 
第七步：
 
打开path
 
 点击新建，新建内容为%JAVA_HOME%\bin，最后点击确定保存即可。
 
 
第八步：
 
将之前在startup.bat中编辑的pause 去掉，重新点击运行即可。