using html:link to pass a param

<html:link action="/urAction.do" paramName="user" paramProperty="name" paramId="name">

paramName: The name of a JSP bean that is a String containing the value for the request parameter named by paramId (if paramProperty is not specified), or a JSP bean whose property getter is called to return a String (if paramProperty is specified). The JSP bean is constrained to the bean scope specified by the paramScope property, if it is specified. 对应javaBean的属性名。

paramProperty: The name of a property of the bean specified by the paramName attribute, whose return value must be a String containing the value of the request parameter (named by the paramId attribute) that will be dynamically added to this hyperlink. 保存在paramName的值，是真正要传的值。

paramId: The name of the request parameter that will be dynamically added to the generated hyperlink. The corresponding value is defined by the paramName and (optional) paramProperty attributes, optionally scoped by the paramScope attribute 存在request当中的变量名，他的值是名字是paramName的值：paramProperty 。