3

首先：我不确定它是否适合这样的问题，所以如果您认为有更多合适的空间，请移动它。

我有一些基于 GAE 的项目需要导入 Eclipse。我下载了新版本的 Eclipse EE (Kepler) 并安装了 App Engine 插件。然后我从源代码创建了一个新项目并尝试对其进行配置......这就是问题开始的地方。

当我尝试构建项目时，出现 3 个错误：

The App Engine SDK '\incap-ii\build\web\WEB-INF\lib\appengine-api-1.0-sdk-1.8.0.jar' on the project's build path is not valid (SDK directory 'D:\incap-ii\build\web\WEB-INF\lib\appengine-api-1.0-sdk-1.8.0.jar' does not exist)    incap-ii        Unknown Google App Engine Problem
Project 'incap-ii' is missing required library: 'war/WEB-INF/lib/jsr107cache-1.1.jar'   incap-ii        Build path  Build Path Problem
The project cannot be built until build path errors are resolved    incap-ii        Unknown Java Problem

第一个错误说找不到某些 jar 文件，但显示的路径很奇怪。实际上它缺少指向工作区（D:\workspaces\eclipse GAE\）的部分 - 休息，从 incap-ii 开始就可以了。我尝试配置构建路径或更改 SDK 路径：

配置

如您所见，我在配置中有 2 个 SDK。但是，我无法更改此项目中使用的那个：我从列表中选择 appengine-java-1.8.5 - 1.8.5，单击确定，对话框窗口关闭但错误仍然存​​在，一旦我再次打开对话框，我就会看到更改未保存（仍然使用错误的）。

我应该更改某些特定配置吗？

[编辑] 更多解释/屏幕（下）。正如您在第 1 号屏幕上看到的那样，我 (preferences\google\appengine) 我配置了 2 个 appEgines：一个是我手动下载和提取的（在屏幕上检查），另一个是由 Google App Engine 插件下载的。无论如何，当我现在检查项目首选项时，我看到 3 个引擎（屏幕 2） - 额外的一个（选定的）在项目目录中。正如我所说，我无法更改它，因为单击“确定”后，更改不会保存。但是，当我打开“配置 SDK”（屏幕 3）时，我只能看到两个外部引擎。我勒个去？我试图重新安装整个 Eclipse，但它没有帮助......而且，当我使用 Netbeans 构建它并从 shell 运行时，我可以使用手动下载的 AppEngine 运行这个项目，所以引擎可能很好......

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2 回答 2

11

我遇到的一个问题可能和你的一样。就我而言，Eclipse 说：

App Engine SDK 'C:\Users\Takahiko.m2\repository\com\google\appengine\appengine-api-1.0-sdk\1.8.8\appengine-api-1.0-sdk-1.8.8.jar'项目的构建路径无效（SDK 位置 'C:\Users\Takahiko.m2\repository\com\google\appengine\appengine-api-1.0-sdk\1.8.8\appengine-api-1.0-sdk-1.8.8 .jar' 不是目录）

这意味着 Eclipse 在搜索 App Engine SDK 的安装目录之前，在本地 maven 存储库 (~/.m2/repository) 中找到了 App Engine SDK 二进制文件。

(1)在 Eclipse 中关闭您的项目。

(2) 使用文本编辑器打开项目的 .classpath，如果它包含与 App Engine 相关的类路径条目，如下所示：

<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/appengine-local-runtime-shared.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/el-api.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp/repackaged-appengine-ant-1.7.1.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp/repackaged-appengine-ant-launcher-1.7.1.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp/repackaged-appengine-jasper-6.0.29.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp/repackaged-appengine-jasper-el-6.0.29.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp/repackaged-appengine-tomcat-juli-6.0.29.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/jsp-api.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/shared/servlet-api.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/appengine-tools-api.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/appengine-api-labs/v1/appengine-api-labs.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/appengine-endpoints/v1/appengine-endpoints-deps.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/appengine-endpoints/v1/appengine-endpoints.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/asm-4.0.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/datanucleus-api-jdo-3.1.3.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/datanucleus-api-jpa-3.1.3.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/datanucleus-appengine-2.1.2.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/datanucleus-core-3.1.3.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/geronimo-jpa_2.0_spec-1.0.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/jdo-api-3.0.1.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/datanucleus/v2/jta-1.1.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/jsr107/v1/appengine-jsr107cache-1.8.8.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/opt/user/jsr107/v1/jsr107cache-1.1.jar">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>
<classpathentry kind="lib" path="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/lib/user/appengine-api-1.0-sdk-1.8.8.jar" sourcepath="C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/src/user/appengine-api-1.0-sdk-1.8.8-src.zip">
    <attributes>
        <attribute name="javadoc_location" value="file:/C:/Eclipse/eclipse-juno/plugins/com.google.appengine.eclipse.sdkbundle_1.8.8/appengine-java-sdk-1.8.8/docs/javadoc/"/>
    </attributes>
</classpathentry>

(3) 删除所有的classpathentry（与App Engine jar 文件相关）。

(4)在 MAVEN2_CLASSPATH_CONTAINER 之前添加GAE_CONTAINER。

<classpathentry kind="con" path="com.google.appengine.eclipse.core.GAE_CONTAINER"/>

(5) 重新打开你的项目。

于 2014-01-04T02:34:48.320 回答
1

您的 SDK 配置似乎有问题。

您的屏幕截图显示了您的项目的配置，但我认为您需要查看首选项-> 谷歌-> 应用程序引擎，并检查您的 SDK 的配置。我认为您无法为您的项目选择的那个很可能会在那里显示错误，但无论哪种方式，您都可能希望删除并重新添加它并确保其路径有效。

于 2013-10-05T22:33:20.293 回答