添加到WEB-INF / lib的jar文件在我尝试导入时无法识别：说包不存在 [英] jars added to WEB-INF/lib doesn't get recognized when I try to import them : says the package doesn't exist

问题描述

我已将 org.apache.commons.fileupload 和 org.apache.commons.io 包添加到 WEB-INF / lib 基于google appengine的项目目录。但是当我尝试导入servlet文件时，编译器/ IDE会发出错误，指出此包不存在。为什么？

添加 jar 文件：

我得到这个的原因是什么？错误？我该怎么做才能解决这个问题？

解决方案

您可能还需要将它们添加到项目的类路径中。

eclipse的

：

右键单击jar，选择构建路径并将其添加到构建路径，然后重试。 / p>

对于netbeans：

在项目属性窗口中单击左侧面板中的库。在右侧面板中，将其添加到编译类路径

I have added org.apache.commons.fileupload and org.apache.commons.io package into the WEB-INF/lib directory of my project based on google appengine. But when I try importing in the servlet files the compiler/IDE gives an error that this package doesn't exist. Why is that ?

The jar files added :

What can be the reason I am getting this error ? What should I do to solve this problem ?

解决方案

You might also have to add them to your project's classpath.

for eclipse:

Right click the jar, select build path and add it to the build path, then try again.

for netbeans:

in the project properties window click libraries in the left panel. In the right panel add it to the compile classpath

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