[Problem phenomenon]:
Use Maven + Eclipse + Jetty for J2EE development, but there is a problem that after the static files such as css and js are changed, saving in eclipse will fail. The error message given by eclipse is that the file is locked, which forces Jetty to be restarted every time. , which is very inconvenient for development.
【Cause Analysis】:
Jetty uses memory-mapped files to cache static files, including js and css files.
Under Windows, using memory mapped files will cause the file to be locked, so js or css files cannot be edited in the editor when Jetty starts.
【solution】:
Change the default configuration of Jetty, do not use memory-mapped files for caching.
step:
1. Find webdefault.xml and find the jetty plugin in the local repository. Take version 6.1.26 as an example, jetty-6.1.26.jar is in $maven_repo$/org/mortbay/jetty/jetty/6.1.26/jetty-6.1 .26.jar, the webdefault.xml file is under the package org\mortbay\jetty\webapp.
Its path in the jar file is org/mortbay/jetty/webapp/webdefault.xml
2. Find the useFileMappedBuffer parameter and set the value to false
<init-param>
<param-name>useFileMappedBufferparam-name>
<param-value>false<param-value>
init-param>
3. In pom.xml, set jetty Use the updated webdefault.xml file
<groupId>org.mortbay.jettygroupId>
<artifactId>maven-jetty-plugin<artifactId>
<version>6.1.26</version>
<configuration>
...
<webAppConfig>
<defaultsDescriptor> src/test/resources/webdefault.xml</defaultsDescriptor>
</webAppConfig>
<configuration>
You're done!
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