Jetty9 启动时不能修改静态文件问题解决

jetty9的解决方案

1.在pom.xml加载jetty9插件

<plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.4.5.v20170502</version>
                <configuration>
                    <scanIntervalSeconds>10</scanIntervalSeconds>
                    <webApp>
                        <contextPath>/basic</contextPath>
                        <defaultsDescriptor>src/main/resources/webdefault.xml</defaultsDescriptor>
                    </webApp>
                    <httpConnector>
                        <port>8080</port>
                    </httpConnector>
                </configuration>
            </plugin>

2.从本地获取webdefault.xml

从 jetty-webapp-9.4.5.v20170502.jar中拿webdefault.xml 复制到工程中 src/resource目录下 这个jar包视版本而定,但是我们可以从maven 本地仓库中查找
目录参考如下:

E:\.m2\repository\org\eclipse\jetty\jetty-webapp\9.4.5.v20170502\jetty-webapp-9.4.5.v20170502.jar

webdefault.xml 参考目录如下:

jetty-webapp-9.4.5.v20170502.jar\org\eclipse\jetty\webapp\webdefault.xml

3.修改 useFileMappedBuffer 的参数

把原来的value true 改为false即可

<init-param>
      <param-name>useFileMappedBuffer</param-name>
      <param-value>false</param-value>
    </init-param>

4.启动时检查加载参数

[INFO] Web defaults = src/main/resources/webdefault.xml
[INFO] Web overrides =  none

如果看到加载的配置项是你配置修改的这个的话,就说明你已经成功了。接下来你就去验证下即可。

另一个通用解决方案

你不用去修改webdefault.xml 以及配置它,直接修改web.xml,加入如下的servlet配置即可

<servlet>
        <servlet-name>default</servlet-name>
        <servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
        <init-param>
            <param-name>useFileMappedBuffer</param-name>
            <param-value>false</param-value>
        </init-param>
        <load-on-startup>10</load-on-startup>
    </servlet>

jetty8 升级的痛

更旧版的解决方案我就不说了。
本文的主要目的就是解决从低版本升级的9版本的问题,使用旧的配置不能修改静态资源而写的。
本人是从8.X升级的
遇到的问题就是配置的pom.xml没有生效,经过查看官网解决
8.x 版配置如下

<plugin>
               <groupId>org.mortbay.jetty</groupId>
               <artifactId>jetty-maven-plugin</artifactId>
               <version>8.1.11.v20130520</version>
               <configuration>                   
                   <scanIntervalSeconds>10</scanIntervalSeconds>
                   <webAppConfig>
                       <contextPath>/basic</contextPath>
                       <defaultsDescriptor>src/main/resources/webdefault.xml</defaultsDescriptor>
                   </webAppConfig>
                   <connectors>
                       <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
                           <port>8080</port>
                           <maxIdleTime>60000</maxIdleTime>
                       </connector>
                   </connectors>
               </configuration>
           </plugin>

请注意webApp 和 webAppConfig !
附上官网这一块的配置链接
9.4.x/webdefault-xml.html

从6.x升级上来的 就对着配置就对了,我也不讲人家的野史啦!嘿嘿
谢谢支持!

最后附上9.X版本webdefault.xml(修改后的)

<?xml version="1.0" encoding="UTF-8"?>
<web-app
        xmlns="http://xmlns.jcp.org/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
        metadata-complete="false"
        version="3.1">

  <!-- ===================================================================== -->
  <!-- This file contains the default descriptor for web applications.       -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <!-- The intent of this descriptor is to include jetty specific or common  -->
  <!-- configuration for all webapps.   If a context has a webdefault.xml    -->
  <!-- descriptor, it is applied before the context's own web.xml file       -->
  <!--                                                                       -->
  <!-- A context may be assigned a default descriptor by calling             -->
  <!-- WebAppContext.setDefaultsDescriptor(String).                          -->
  <!--                                                                       -->
  <!-- This file is present in the jetty-webapp.jar, and is used as the      -->
  <!-- defaults descriptor if no other is explicitly set on a context.       -->
  <!--                                                                       -->
  <!-- A copy of this file is also placed into the $JETTY_HOME/etc dir of    -->
  <!-- the  distribution, and is referenced by some of the other xml files,  -->
  <!-- eg the jetty-deploy.xml file.                                         -->
  <!-- ===================================================================== -->

  <description>
    Default web.xml file.
    This file is applied to a Web application before its own WEB_INF/web.xml file
  </description>

  <!-- ==================================================================== -->
  <!-- Removes static references to beans from javax.el.BeanELResolver to   -->
  <!-- ensure webapp classloader can be released on undeploy                -->
  <!-- ==================================================================== -->
  <listener>
    <listener-class>org.eclipse.jetty.servlet.listener.ELContextCleaner</listener-class>
  </listener>

  <!-- ==================================================================== -->
  <!-- Removes static cache of Methods from java.beans.Introspector to      -->
  <!-- ensure webapp classloader can be released on undeploy                -->
  <!-- ==================================================================== -->
  <listener>
    <listener-class>org.eclipse.jetty.servlet.listener.IntrospectorCleaner</listener-class>
  </listener>


  <!-- ==================================================================== -->
  <!-- Context params to control Session Cookies                            -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <!--
    UNCOMMENT TO ACTIVATE
    <context-param>
      <param-name>org.eclipse.jetty.servlet.SessionDomain</param-name>
      <param-value>127.0.0.1</param-value>
    </context-param>
    <context-param>
      <param-name>org.eclipse.jetty.servlet.SessionPath</param-name>
      <param-value>/</param-value>
    </context-param>
    <context-param>
      <param-name>org.eclipse.jetty.servlet.MaxAge</param-name>
      <param-value>-1</param-value>
    </context-param>
  -->

  <!-- ==================================================================== -->
  <!-- The default servlet.                                                 -->
  <!-- This servlet, normally mapped to /, provides the handling for static -->
  <!-- content, OPTIONS and TRACE methods for the context.                  -->
  <!-- The following initParameters are supported:                          -->
  <!--
 *  acceptRanges      If true, range requests and responses are
 *                    supported
 *
 *  dirAllowed        If true, directory listings are returned if no
 *                    welcome file is found. Else 403 Forbidden.
 *
 *  welcomeServlets   If true, attempt to dispatch to welcome files
 *                    that are servlets, but only after no matching static
 *                    resources could be found. If false, then a welcome
 *                    file must exist on disk. If "exact", then exact
 *                    servlet matches are supported without an existing file.
 *                    Default is true.
 *
 *                    This must be false if you want directory listings,
 *                    but have index.jsp in your welcome file list.
 *
 *  redirectWelcome   If true, welcome files are redirected rather than
 *                    forwarded to.
 *
 *  gzip              If set to true, then static content will be served as
 *                    gzip content encoded if a matching resource is
 *                    found ending with ".gz" (default false)
 *                    (deprecated: use precompressed)
 *
 *  precompressed     If set to a comma separated list of file extensions, these
 *                    indicate compressed formats that are known to map to a mime-type
 *                    that may be listed in a requests Accept-Encoding header.
 *                    If set to a boolean True, then a default set of compressed formats
 *                    will be used, otherwise no precompressed formats.
 *
 *  resourceBase      Set to replace the context resource base
 *
 *  resourceCache     If set, this is a context attribute name, which the servlet
 *                    will use to look for a shared ResourceCache instance.
 *
 *  relativeResourceBase
 *                    Set with a pathname relative to the base of the
 *                    servlet context root. Useful for only serving static content out
 *                    of only specific subdirectories.
 *
 *  pathInfoOnly      If true, only the path info will be applied to the resourceBase
 *
 *  stylesheet        Set with the location of an optional stylesheet that will be used
 *                    to decorate the directory listing html.
 *
 *  aliases           If True, aliases of resources are allowed (eg. symbolic
 *                    links and caps variations). May bypass security constraints.
 *
 *  etags             If True, weak etags will be generated and handled.
 *
 *  maxCacheSize      The maximum total size of the cache or 0 for no cache.
 *  maxCachedFileSize The maximum size of a file to cache
 *  maxCachedFiles    The maximum number of files to cache
 *
 *  useFileMappedBuffer
 *                    If set to true, it will use mapped file buffers to serve static content
 *                    when using an NIO connector. Setting this value to false means that
 *                    a direct buffer will be used instead of a mapped file buffer.
 *                    This file sets the value to true.
 *
 *  cacheControl      If set, all static content will have this value set as the cache-control
 *                    header.
 *
 -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
    <init-param>
      <param-name>aliases</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>acceptRanges</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>dirAllowed</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>welcomeServlets</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>redirectWelcome</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>maxCacheSize</param-name>
      <param-value>256000000</param-value>
    </init-param>
    <init-param>
      <param-name>maxCachedFileSize</param-name>
      <param-value>200000000</param-value>
    </init-param>
    <init-param>
      <param-name>maxCachedFiles</param-name>
      <param-value>2048</param-value>
    </init-param>
    <!--
    <init-param>
      <param-name>precompressed</param-name>
      <param-value>gzip,br</param-value>
    </init-param>
    -->
    <init-param>
      <param-name>etags</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>useFileMappedBuffer</param-name>
      <param-value>false</param-value>
    </init-param>
    <!--
    <init-param>
      <param-name>resourceCache</param-name>
      <param-value>resourceCache</param-value>
    </init-param>
    -->
    <!--
    <init-param>
      <param-name>cacheControl</param-name>
      <param-value>max-age=3600,public</param-value>
    </init-param>
    -->
    <load-on-startup>0</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>


  <!-- ==================================================================== -->
  <!-- JSP Servlet                                                          -->
  <!-- This is the jasper JSP servlet.                                      -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <!-- The JSP page compiler and execution servlet, which is the mechanism  -->
  <!-- used by the jsp container to support JSP pages.  Traditionally,      -->
  <!-- this servlet is mapped to URL pattern "*.jsp".  This servlet         -->
  <!-- supports the following initialization parameters (default values     -->
  <!-- are in square brackets):                                             -->
  <!--                                                                      -->
  <!--   checkInterval       If development is false and reloading is true, -->
  <!--                       background compiles are enabled. checkInterval -->
  <!--                       is the time in seconds between checks to see   -->
  <!--                       if a JSP page needs to be recompiled. [300]    -->
  <!--                                                                      -->
  <!--   compiler            Which compiler Ant should use to compile JSP   -->
  <!--                       pages.  See the Ant documentation for more     -->
  <!--                       information. [javac]                           -->
  <!--                                                                      -->
  <!--   classdebuginfo      Should the class file be compiled with         -->
  <!--                       debugging information?  [true]                 -->
  <!--                                                                      -->
  <!--   classpath           What class path should I use while compiling   -->
  <!--                       generated servlets?  [Created dynamically      -->
  <!--                       based on the current web application]          -->
  <!--                       Set to ? to make the container explicitly set  -->
  <!--                       this parameter.                                -->
  <!--                                                                      -->
  <!--   development         Is Jasper used in development mode (will check -->
  <!--                       for JSP modification on every access)?  [true] -->
  <!--                                                                      -->
  <!--   enablePooling       Determines whether tag handler pooling is      -->
  <!--                       enabled  [true]                                -->
  <!--                                                                      -->
  <!--   fork                Tell Ant to fork compiles of JSP pages so that -->
  <!--                       a separate JVM is used for JSP page compiles   -->
  <!--                       from the one Tomcat is running in. [true]      -->
  <!--                                                                      -->
  <!--   ieClassId           The class-id value to be sent to Internet      -->
  <!--                       Explorer when using <jsp:plugin> tags.         -->
  <!--                       [clsid:8AD9C840-044E-11D1-B3E9-00805F499D93]   -->
  <!--                                                                      -->
  <!--   javaEncoding        Java file encoding to use for generating java  -->
  <!--                       source files. [UTF-8]                          -->
  <!--                                                                      -->
  <!--   keepgenerated       Should we keep the generated Java source code  -->
  <!--                       for each page instead of deleting it? [true]   -->
  <!--                                                                      -->
  <!--   logVerbosityLevel   The level of detailed messages to be produced  -->
  <!--                       by this servlet.  Increasing levels cause the  -->
  <!--                       generation of more messages.  Valid values are -->
  <!--                       FATAL, ERROR, WARNING, INFORMATION, and DEBUG. -->
  <!--                       [WARNING]                                      -->
  <!--                                                                      -->
  <!--   mappedfile          Should we generate static content with one     -->
  <!--                       print statement per input line, to ease        -->
  <!--                       debugging?  [false]                            -->
  <!--                                                                      -->
  <!--                                                                      -->
  <!--   reloading           Should Jasper check for modified JSPs?  [true] -->
  <!--                                                                      -->
  <!--   suppressSmap        Should the generation of SMAP info for JSR45   -->
  <!--                       debugging be suppressed?  [false]              -->
  <!--                                                                      -->
  <!--   dumpSmap            Should the SMAP info for JSR45 debugging be    -->
  <!--                       dumped to a file? [false]                      -->
  <!--                       False if suppressSmap is true                  -->
  <!--                                                                      -->
  <!--   scratchdir          What scratch directory should we use when      -->
  <!--                       compiling JSP pages?  [default work directory  -->
  <!--                       for the current web application]               -->
  <!--                                                                      -->
  <!--   tagpoolMaxSize      The maximum tag handler pool size  [5]         -->
  <!--                                                                      -->
  <!--   xpoweredBy          Determines whether X-Powered-By response       -->
  <!--                       header is added by generated servlet  [false]  -->
  <!--                                                                      -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <servlet id="jsp">
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.eclipse.jetty.jsp.JettyJspServlet</servlet-class>
    <init-param>
      <param-name>logVerbosityLevel</param-name>
      <param-value>DEBUG</param-value>
    </init-param>
    <init-param>
      <param-name>fork</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>xpoweredBy</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>compilerTargetVM</param-name>
      <param-value>1.7</param-value>
    </init-param>
    <init-param>
      <param-name>compilerSourceVM</param-name>
      <param-value>1.7</param-value>
    </init-param>
    <!--
    <init-param>
        <param-name>classpath</param-name>
        <param-value>?</param-value>
    </init-param>
    -->
    <load-on-startup>0</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>jsp</servlet-name>
    <url-pattern>*.jsp</url-pattern>
    <url-pattern>*.jspf</url-pattern>
    <url-pattern>*.jspx</url-pattern>
    <url-pattern>*.xsp</url-pattern>
    <url-pattern>*.JSP</url-pattern>
    <url-pattern>*.JSPF</url-pattern>
    <url-pattern>*.JSPX</url-pattern>
    <url-pattern>*.XSP</url-pattern>
  </servlet-mapping>


  <!-- ==================================================================== -->
  <!-- Default session configuration                                        -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <session-config>
    <session-timeout>30</session-timeout>
  </session-config>

  <!-- ==================================================================== -->
  <!-- Default MIME mappings                                                -->
  <!-- The default MIME mappings are provided by the mime.properties        -->
  <!-- resource in the jetty-http.jar file.  Additional or modified         -->
  <!-- mappings may be specified here                                       -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <!-- UNCOMMENT TO ACTIVATE
  <mime-mapping>
    <extension>mysuffix</extension>
    <mime-type>mymime/type</mime-type>
  </mime-mapping>
  -->

  <!-- ==================================================================== -->
  <!-- Default welcome files                                                -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

  <!-- ==================================================================== -->
  <!-- Default locale encodings                                             -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <locale-encoding-mapping-list>
    <locale-encoding-mapping>
      <locale>ar</locale>
      <encoding>ISO-8859-6</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>be</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>bg</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>ca</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>cs</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>da</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>de</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>el</locale>
      <encoding>ISO-8859-7</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>en</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>es</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>et</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>fi</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>fr</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>hr</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>hu</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>is</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>it</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>iw</locale>
      <encoding>ISO-8859-8</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>ja</locale>
      <encoding>Shift_JIS</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>ko</locale>
      <encoding>EUC-KR</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>lt</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>lv</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>mk</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>nl</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>no</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>pl</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>pt</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>ro</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>ru</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sh</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sk</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sl</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sq</locale>
      <encoding>ISO-8859-2</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sr</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>sv</locale>
      <encoding>ISO-8859-1</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>tr</locale>
      <encoding>ISO-8859-9</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>uk</locale>
      <encoding>ISO-8859-5</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>zh</locale>
      <encoding>GB2312</encoding>
    </locale-encoding-mapping>
    <locale-encoding-mapping>
      <locale>zh_TW</locale>
      <encoding>Big5</encoding>
    </locale-encoding-mapping>
  </locale-encoding-mapping-list>

  <!-- ==================================================================== -->
  <!-- Disable TRACE method with security constraint                        -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Disable TRACE</web-resource-name>
      <url-pattern>/</url-pattern>
      <http-method>TRACE</http-method>
    </web-resource-collection>
    <auth-constraint/>
  </security-constraint>
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Enable everything but TRACE</web-resource-name>
      <url-pattern>/</url-pattern>
      <http-method-omission>TRACE</http-method-omission>
    </web-resource-collection>
  </security-constraint>

</web-app>
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