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初学Web遇到的问题

2012-12-16 12:08:50 481 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

杀手墨衍会员 · AI 创作全网分发关注 + 加入社区

Surface Pro 4/5/6/7保姆级黑苹果安装：从Windows分区到OC引导配置全流程（含EFI文件替换避坑）本文详细介绍了在Surface Pro 4/5/6/7上安装黑苹果的全流程，包括Windows分区、OC引导配置和EFI文件替换等关键步骤。通过实战经验分享，帮助用户避开常见陷阱，实现Windows与macOS双系统完美共存，特别适合对黑苹果安装感兴趣的Surface Pro用户。阅读详情

刚开始学JAVAWeb,配置好了Tomcat,用myeclipse建了一个项目。
使用外挂Tomcat访问http://localhost:8080/项目名称/Servelet名称,提示404(按照视频一步步操作，不存在没有部署问题).但是http://localhost:8080/项目名称/WebRoot/Servelet名称，可以正常访问。现在只能改Server.xml实现
如果用自带集成的tomcat就可以正常访问。
视频中的就可以，疑惑好久，希望大神能够解答。

...全文

100kHz手持LCR表设计：高频阻抗测量与校准实战解析阻抗测量是电子元件测试的基础，LCR表通过施加正弦激励并分析电压电流的幅值与相位，即可获取电容、电感、电阻的等效参数。在开关电源、无线充电等高频应用场景中，元件在100kHz下的ESR和阻抗特性尤为关键，传统10kHz手持仪表难以满足需求。本文从自动平衡桥原理出发，探讨如何将台式电桥的核心能力浓缩至手持设备，重点剖析高频寄生参数抑制、模拟链路设计、数字相敏检波算法及开路短路校准方法。通过实测数据验证，在100kHz频率下基本精度可达0.5%以内，为维修现场、产线抽检及硬件调试提供了可携带的精密测量方案。全文阅读详情

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Curtain李志鹏 2012-12-18

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你部署时候的文件是不是目录有问题？

杀手 2012-12-18

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引用 10 楼 dw_java08 的回复:

楼主把你的server.xml的配置文件代码贴出来看看，帮你分析分析。。。


<?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">

  <!--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" />
  <!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html -->
  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

  <!-- 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 JSSE configuration, when using APR, the 
         connector should be using the OpenSSL style configuration
         described in the APR documentation -->
    <!--
    <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
               maxThreads="150" 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"/>
      -->        

      <!-- The request dumper valve dumps useful debugging information about
           the request and response data received and sent by Tomcat.
           Documentation at: /docs/config/valve.html -->
      <!--
      <Valve className="org.apache.catalina.valves.RequestDumperValve"/>
      -->

      <!-- 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"/>

      <!-- Define the default virtual host
           Note: XML Schema validation will not work with Xerces 2.2.
       -->
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true"
            xmlValidation="false" xmlNamespaceAware="false">

        <!-- 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 -->
        <!--
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
               prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
        -->

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

杀手 2012-12-18

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引用 12 楼 zpeng_lee 的回复:

你部署时候的文件是不是目录有问题？

用myeclipse部署的，不存在问题

dw_java08 2012-12-17

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楼主把你的server.xml的配置文件代码贴出来看看，帮你分析分析。。。

杀手 2012-12-17

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等待回答！！

ly3946 2012-12-16

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不错不错学习了!

PK0071 2012-12-16

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引用 1 楼 ldh911 的回复:

那说明你在server.xml中配置的根路径错误而已，应该要配置到 WebRoot 这层目录里面去。

笑莫问 2012-12-16

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同意一楼说法。

MiceRice 2012-12-16

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那说明你在server.xml中配置的根路径错误而已，应该要配置到 WebRoot 这层目录里面去。

xiaofengyue828 2012-12-16

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引用楼主 Crazy__yu 的回复:

刚开始学JAVAWeb,配置好了Tomcat,用myeclipse建了一个项目。使用外挂Tomcat访问http://localhost:8080/项目名称/Servelet名称,提示404(按照视频一步步操作，不存在没有部署问题).但是http://localhost:8080/项目名称/WebRoot/Servelet名称，可以正常访问。现在只能改Server.xml实现 ……

一楼说的很对。

杀手 2012-12-16

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引用 1 楼 ldh911 的回复:

那说明你在server.xml中配置的根路径错误而已，应该要配置到 WebRoot 这层目录里面去。

我的意思不是在server.xml中配置应用，是将应用创建在webapps中。http://localhost:8080/项目名称/Servelet名称这样访问报404错误。视频中这样直接访问就可以。

Iam_magicHu 2012-12-16

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引用 1 楼 ldh911 的回复:

那说明你在server.xml中配置的根路径错误而已，应该要配置到 WebRoot 这层目录里面去。

Iam_magicHu 2012-12-16

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引用楼主 Crazy__yu 的回复:

刚开始学JAVAWeb,配置好了Tomcat,用myeclipse建了一个项目。使用外挂Tomcat访问http://localhost:8080/项目名称/Servelet名称,提示404(按照视频一步步操作，不存在没有部署问题).但是http://localhost:8080/项目名称/WebRoot/Servelet名称，可以正常访问。现在只能改Serv……

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初学Web遇到的问题

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