当我尝试导入它们时，添加到 WEB-INF/lib 的 jars 没有被识别: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 中我的项目目录基于 google appengine.但是当我尝试导入 servlet 文件时，编译器/IDE 给出了一个错误，表明这个包不存在.这是为什么?

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 ?

添加的 jar 文件:

我收到此错误的原因是什么?我应该怎么做才能解决这个问题?

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

推荐答案

您可能还需要将它们添加到项目的类路径中.

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

对于日食:

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.

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

对于网络豆:

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

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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