maven-jetty-plugin保存文件报错：请求的操作无法在使用用户映射区域打开的文件上执行

水深无声 2021-09-10 16:02 140阅读 0赞

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使用jetty-maven-plugin 在eclipse中进行运行调试,碰到无法编辑保存webapp下的文件

提示:请求的操作无法在使用用户映射区域打开的文件上执行

解决方法:

从 jetty 7 开始,jar存放在maven仓库中的路径为org/eclise/jetty/jetty-webapp

打开对应的版本的jar包  
修改jar中的org/mortbay/jetty/webapp/webdefault.xml文件

1.  <init-param>     
2.    <param-name>useFileMappedBuffer</param-name>     
3.    <param-value>**true**</param-value>      
4.  </init-param>

改好后放回jar包

另一种办法是将webdefault.xml 提取出来,修改后放在给定位置,然后配置jetty插件的信息

1.  <configuration>      
2.    <webAppConfig>   
3.      <defaultsDescriptor>src/test/resources/webdefault.xml</defaultsDescriptor>   
4.    </webAppConfig>    
5.  </configuration>

对于jetty9之后的版本可以这样改：

把webdefault.xml文件复制到src/main/resources/目录下，修改useFileMappedBuffer的值为false。然后修改pom.xml如下：

<groupId>org.eclipse.jetty</groupId>

<artifactId>jetty\-maven\-plugin</artifactId>

<defaultsDescriptor>src/main/resources/webdefault.xml</defaultsDescriptor>

</webApp>

</configuration>

</plugin>

参考：

### Configuring Your WebApp ###

These configuration parameters apply to your webapp. They are common to almost all goals.

**webApp**

Represents an extension to the class [`org.eclipse.jetty.webapp.WebAppContext`][org.eclipse.jetty.webapp.WebAppContext]. You can use any of the setter methods on this object to configure your webapp. Here are a few of the most useful ones:

**contextPath**

The context path for your webapp. By default, this is set to `/`.

**descriptor**

The path to the `web.xml` file for your webapp.

**defaultsDescriptor**

The path to a `webdefault.xml` file that will be applied to your webapp before the `web.xml`. If you don't supply one, Jetty uses a default file baked into the `jetty-webapp.jar`.

**overrideDescriptor**

The path to a `web.xml` file that Jetty applies after reading your `web.xml`. You can use this to replace or add configuration.

**tempDirectory**

The path to a dir that Jetty can use to expand or copy jars and jsp compiles when your webapp is running. The default is`${project.build.outputDirectory}/tmp`.

**baseResource**

The path from which Jetty serves static resources. Defaults to `src/main/webapp`.

**resourceBases**

Use instead of `baseResource` if you have multiple dirs from which you want to serve static content. This is an array of dir names.

**baseAppFirst**

Defaults to "true". Controls whether any overlaid wars are added before or after the original base resource(s) of the webapp. See the section on [overlaid wars][] for more information.

**contextXml**

The path to a context xml file that is applied to your webapp AFTER the `webApp` element.

来源： <[http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html\#configuring-your-webapp][http_www.eclipse.org_jetty_documentation_current_jetty-maven-plugin.html_configuring-your-webapp]>

[org.eclipse.jetty.webapp.WebAppContext]: http://download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/webapp/WebAppContext.hml
[overlaid wars]: http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html#using-overlaid-wars
[http_www.eclipse.org_jetty_documentation_current_jetty-maven-plugin.html_configuring-your-webapp]: http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html#configuring-your-webapp