tomcat 7应用程序迁移到tomcat 8

Question

我试图用以下xml文件在tomcat 8中部署一个应用程序：

<?xml version='1.0' encoding='utf-8'?>
<Context docBase="/home/httpd/chAdmin" path="/chAdmin">
<Loader className="org.apache.catalina.loader.VirtualWebappLoader"
        virtualClasspath="/usr/local/calendar/libs/google-api-client-1.19.0.jar;/usr/local/calendar/google-api-services-calendar-v3-rev107-1.19.0.jar;/usr/local/calendar/libs/google-http-client-1.19.0.jar;/usr/local/calendar/libs/google-http-client-jackson2-1.19.0.jar;/usr/local/calendar/libs/google-oauth-client-1.19.0.jar;/usr/local/calendar/libs/jackson-core-2.1.3.jar"/>
</Context>

我读了很多关于资源方法的迁移，并将xml文件更改为：

<?xml version='1.0' encoding='utf-8'?>
<Context docBase="/home/httpd/chAdmin" path="/chAdmin">
    <Resources className="org.apache.catalina.webresources.StandardRoot">
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/libs/google-api-client-1.19.0.jar" webAppMount="/" />
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/google-api-services-calendar-v3-rev107-1.19.0.jar" webAppMount="/" />
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/libs/google-http-client-1.19.0.jar" webAppMount="/" />
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/libs/google-http-client-jackson2-1.19.0.jar" webAppMount="/" />
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/libs/google-oauth-client-1.19.0.jar" webAppMount="/" />
        <JarResources className="org.apache.catalina.webresources.JarResourceSet"
            base="/usr/local/calendar/libs/jackson-core-2.1.3.jar" webAppMount="/" />
    </Resources>
</Context>

该应用程序启动正常，但没有从jar文件中导入类。我肯定我错过了一些东西，找不到一个好的例子来说明如何做到这一点。请帮助。

我的JSP无法编译，正在抛出

组织。阿帕奇。贾斯珀。JaspereException:无法为JSP编译类：在生成的java文件：[/usr/local/apache-tomcat-8.0.30/work/Catalina/localhost/chAdmin/org/apache/JSP/charters_JSP.java]的第[20]行发生错误，只能导入类型。通用域名格式。谷歌。应用程序编程接口。客户json。JsonFactory解析为一个包

显然，这意味着jar文件无法正确导入，因为com/google/api/Client/json/JsonFactory.classgoogle-http-client-1.19.0.jar

Answer 1

我试图通过在上下文中添加下面的Postresources标记来覆盖这些类。xml，但它没有帮助。关于如何用外部类文件覆盖分解的war文件中的类的任何其他想法。

<PostResources className="org.apache.catalina.webresources.DirResourceSet"
                        base="/workspace/MY_UTIL_PROJECT/WebContent/WEB-INF/classes"
                        webAppMount="/WEB-INF/classes">
                </PostResources>

Answer 2

请尝试使用WEB-INF/lib作为您的webAppMount

举个例子：

请注意里面的注释，并注意我使用了PostResources而不是PreResources，这样，如果我对我的“util”实现不满意，我可以重写当前项目中的类。实际上，我不确定JarResource是否被视为“PostResource”或“PreResource”，但重写静态内容和类是有效的。

    <!--
         https://tomcat.apache.org/tomcat-8.0-doc/config/resources.html
         http://stackoverflow.com/questions/23143697/adding-external-resources-to-class-path-in-tomcat-8
         http://stackoverflow.com/questions/34515852/tomcat-7-application-migration-to-tomcat-8
         http://mikusa.blogspot.co.za/2014/07/tips-on-migrating-to-tomat-8-resources.html
    -->
    <Context path="/MY_PROJECT" docBase="/MY_PROJECT">
        <Resources className="org.apache.catalina.webresources.StandardRoot">
            <!-- Post-load the static content from my util project -->
            <PostResources className="org.apache.catalina.webresources.DirResourceSet"
                    base="/workspace/MY_UTIL_PROJECT/WebContent"
                    webAppMount="/">
            </PostResources>
            <!-- Post-load the classes from my util project -->
            <PostResources className="org.apache.catalina.webresources.DirResourceSet"
                    base="/workspace/MY_UTIL_PROJECT/WebContent/WEB-INF/classes"
                    webAppMount="/WEB-INF/classes">
            </PostResources>
            <!-- Load the JARs contained within my util project -->
            <JarResources className="org.apache.catalina.webresources.DirResourceSet"
                    base="/workspace/MY_UTIL_PROJECT/WebContent/WEB-INF/lib"
                    webAppMount="/WEB-INF/lib">
            </JarResources>
        </Resources>
    </Context>

Answer 3

我在搜索丢失的jar问题时发现了这个问题，我通过将webAppMount更改为WEB-INF/classes来实现它，如下所示

<JarResources className="org.apache.catalina.webresources.JarResourceSet"
        base="/usr/local/calendar/libs/google-http-client-1.19.0.jar" webAppMount="/WEB-INF/classes" />