java.lang.IllegalArgumentException: No bean specified

最新推荐文章于 2021-02-12 15:47:32 发布

swandragon

最新推荐文章于 2021-02-12 15:47:32 发布

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分类专栏： Exception struts 文章标签： bean html

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本文解析了Struts框架中使用BeanUtils.populate方法时出现的异常原因及解决办法，异常源于未初始化的bean对象导致IllegalArgumentException错误。

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javax.servlet.ServletException: BeanUtils.populate org.apache.struts.util.RequestUtils.populate(RequestUtils.java:495) org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:816) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) javax.servlet.http.HttpServlet.service(HttpServlet.java:710) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.jb.common.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:32) root cause java.lang.IllegalArgumentException: No bean specified org.apache.commons.beanutils.PropertyUtils.getPropertyDescriptor(PropertyUtils.java:837) org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:934) org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808) org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493) org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:816) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) javax.servlet.http.HttpServlet.service(HttpServlet.java:710) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.jb.common.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:32)

<


html:select 


property


="a.Bean"


>






private Bean bean;



public Bean getBean() {



      return 


bean


;



}



public void setBean(Bean 


bean


) {



      this.bean = 


bean


;



}










出现异常的原因






bean


 没有初始化



解决方法new 一下就行了



private Bean bean = new Bean();