java.lang.ClassNotFoundException: org.apache.commons.collections.FastHashMap

最新推荐文章于 2022-06-10 11:02:46 发布

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最新推荐文章于 2022-06-10 11:02:46 发布

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分类专栏： jsp 文章标签： ClassNotFoundExcepti org.apache.commons.c

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本文探讨了在使用Apache Commons Collections库时遇到的NoClassDefFoundError异常问题，通过添加缺失的jar包解决该问题，并提供了完整的堆栈跟踪信息。建议在lib目录下加入commons-collections-3.2.1.jar来避免此类错误。

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异常如下：

type Exception report

message Servlet execution threw an exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet execution threw an exception

root cause

java.lang.NoClassDefFoundError: org/apache/commons/collections/FastHashMap
	org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:959)
	org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:929)
	org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:454)
	cn.itcast.utils.WebUtils.request2bean(WebUtils.java:27)
	cn.itcast.web.servlet.control.AddCustomerServlet.doGet(AddCustomerServlet.java:27)
	cn.itcast.web.servlet.control.AddCustomerServlet.doPost(AddCustomerServlet.java:42)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

root cause

java.lang.ClassNotFoundException: org.apache.commons.collections.FastHashMap
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
	org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:959)
	org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:929)
	org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:454)
	cn.itcast.utils.WebUtils.request2bean(WebUtils.java:27)
	cn.itcast.web.servlet.control.AddCustomerServlet.doGet(AddCustomerServlet.java:27)
	cn.itcast.web.servlet.control.AddCustomerServlet.doPost(AddCustomerServlet.java:42)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.42 logs.

在lib目录下加上commons-collections-3.2.1.jar这个包就可以了