Importing jar packages into Eclipse's Javaweb project

One:

Download the corresponding jar package on the JAR package website that you need. such as Org.apache.commons.lang.jar.

Second: Copy and paste into the Web-inf directory of the Javaweb under the Lib directory, such as:

Three: Right-click the jar package to select Build Path->configure build Path->add Jars (then select the jar package that corresponds to your project)

Four: To use the words in the JSP file inserted as <%@ page import= "Org.apache.commons.lang.StringUtils"%>

Importing jar packages into Eclipse's Javaweb project