【BUG】在用beanutils工具将map封装到javabean时出现下列错误

最新推荐文章于 2022-09-28 15:49:40 发布

原创最新推荐文章于 2022-09-28 15:49:40 发布 · 952 阅读

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在使用BeanUtils工具将Map转换为JavaBean时遇到错误，根源在于Apache Commons Collections 4.1版本与某些API不兼容。通过查看服务器日志并参考StackOverflow，解决方案是降级到Apache Commons Collections 3.2.2版本，问题得到解决。

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javax.servlet.ServletException: Servlet execution threw an exception
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

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.BeanUtilsBean.populate(BeanUtilsBean.java:821)
	org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:431)
	cn.shenqueying.regist.Regist.doGet(Regist.java:44)
	cn.shenqueying.regist.Regist.doPost(Regist.java:67)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

java.lang.ClassNotFoundException: org.apache.commons.collections.FastHashMap
	org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1291)
	org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119)
	org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:959)
	org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:929)
	org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:821)
	org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:431)
	cn.shenqueying.regist.Regist.doGet(Regist.java:44)
	cn.shenqueying.regist.Regist.doPost(Regist.java:67)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note The full stack trace of the root cause is available in the server logs.

去StackOverflow看了下，应该是Apache Commons Collections 4.1这个版本太高了，不兼容以前的一些api，需要自己导入低版本的。我导入Apache Commons Collections 3.2.2之后就可以了。