SpringMVC java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name

当跳转到一个含有form表单的页面的时候

如<form:form commandName="useCarInfo"

必须要new一个useCarInfo的同名实例给jsp来接收表单中的参数，

否则报出异常

org.apache.jasper.JasperException: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'useCarInfo' available as request attribute