我正在尝试编译一个从jar导入类的项目，但它无法正常工作。这是我的主要课程：
package sample.calendar;
import org.jasypt.util.password.*;
public class OutlookToGmailCalendarSync {
public static void main(String[] args) {
System.out.println("hi");
}
}
这是我的build.xml：
<project name="MyCalendarSample" default="run" basedir=".">
<description>
simple example build file
</description>
<!-- set global properties for this build -->
<property name="src" location="src"/>
<property name="build" location="build"/>
<property name="dist" location="dist"/>
<path id="path.class">
<pathelement location="build"/>
<fileset dir="lib">
<include name="*.jar"/>
</fileset>
</path>
<!--Run-->
<target name="run" depends="compile"
description="Runs the complied project">
<java fork="true" classname="sample.calendar.OutlookToGmailCalendarSync">
<classpath>
<path refid="path.class"/>
</classpath>
</java>
</target>
<!--Compile-->
<target name="compile" depends="init"
description="compile the source " >
<!-- Compile the java code from ${src} into ${build} -->
<javac srcdir="${src}" destdir="${build}"/>
</target>
<!--Init-->
<target name="init">
<!-- Create the time stamp -->
<tstamp/>
<mkdir dir="${build}"/>
</target>
<!--Clean-->
<target name="clean"
description="clean up" >
<!-- Delete the ${build} directory trees -->
<delete dir="${build}"/>
</target>
</project>
运行ant时出现错误：
compile:
[javac] C:\java\my\build.xml:31: warning: 'includeantruntime' was not set, d
efaulting to build.sysclasspath=last; set to false for repeatable builds
[javac] Compiling 28 source files to C:\java\my\build
[javac] C:\java\my\src\sample\calendar\OutlookToGmailCalendarSync.java:2: er
ror: package org.jasypt.util.password does not exist
[javac] import org.jasypt.util.password.*;
[javac] ^
[javac] 1 error
org.jasypt.util.password位于lib文件夹中的jar文件中，为什么我会收到此错误？