Jetty9 启动时不能修改静态文件问题解决
2017-10-28 21:44
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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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