为什么我不能在 WEB-INF 之外打包某些 JAR

问题描述

我在几篇博客中读到，不建议(或不可能)将 jars 打包到 WEB-INF 文件夹之外.我很好奇为什么会这样..

I have read in several blogs that it is not advised (or not possible)to pack jars outside the WEB-INF folder. I am curious as to know why this is so..

例如，

mainStuff.war
|
|-->WEB-INF
|   |
|   |-->lib     (having many jars, used by the contents of specificStuff.jar
|   |-->classes
|   |-->web.xml
|
|-->META-INF        (having the .MF file and signed files .SF and .DSA)
|
|
|-->index.jsp       (consists of a jnlp xml, referring to the jars in lib)
|
|
|-->specificStuff.jar   (this is a separate jar module, which is mentioned in the POM of the war)

在 index.jsp 中的 jnlp 配置中，我指的是 lib 中的 jars，例如:

In the jnlp configuration in index.jsp, i am referring to the jars in lib like:

  <resources>
    <java version="1.6+"/>
    <jar href="specificStuff.jar"/>
    <jar href="lib/someJarthatIneed.jar"/>
  </resources>

现在，当我启动 JNLP 时，出现 someJarthatIneed 加载失败的错误.但是，当我手动将 lib 移到 WEB-INF 之外时，没有发生此错误.

Now, when i launch my JNLP, I get the error that someJarthatIneed failed to load. However, when i manually moved the lib outside WEB-INF, this error did not occur.

那么，我需要知道的是，有没有办法将 lib 文件夹和所有 jars 打包到 WEB-INF 之外??或者为什么我的 jnlp(在 WEB-INF 之外)无法从 WEB-INF/lib 加载 jar.(我尝试将 jar 的路径更改为

So, what I need to know is that, is there any way to pack the lib folder and all jars outside WEB-INF??ORWhy is it that my jnlp (which is outside WEB-INF) not able to load the jar from WEB-INF/lib.(I tried changing the path of jar as

<jar href="WEB-INF/lib/someJarthatIneed.jar"/>

但它也不起作用..)

对此的任何帮助都将得到认可.:)

Any help on this will be apprciated. :)

推荐答案

感谢所有建议...但是，我找到了解决方案...

Thanks for all the suggestions... But, I found a way to do it..

我使用maven-dependency-plugin(copy-dependencies)把所有的依赖jar包复制到一个文件夹lib下到指定位置.

I used the maven-dependency-plugin (copy-dependencies) to copy all the dependency jars to a folder lib to a specified location.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <version>2.10</version>
    <executions>
        <execution>
            <id>copy-dependencies</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>copy-dependencies</goal>
            </goals>
            <configuration>
                <outputDirectory>${basedir}/src/main/webapp/lib</outputDirectory>
                <includeScope>compile</includeScope>
            </configuration>
        </execution>
    </executions>
</plugin>

然后使用

  <packagingExcludes>WEB-INF/lib/</packagingExcludes>

在 pom 中，您使用 maven-war-plugin 进行战争，从 WEB-INF 中删除 lib 文件夹..

in the pom, where you are using maven-war-plugin to make the war, to remove the lib folder from WEB-INF..

所以，现在 index.jsp 能够从 lib 中获取所有的 jar.

So, now the index.jsp is able to fetch all the jars from the lib.

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