Webwork request error cause

 

Today, when debugging A webwork project class, an error occurs:

Servlet. Service () for servlet webwork threw exception java. Lang. nullpointerexception

MyProgramFor example, accessHttp: // localhost: 8080/flxx2/plus/script/downfilebysortid. Action? Sortid = 1123

To obtain the sortid value in my class, you must use the followingCode:

Httpservletrequest request = NULL;
Public void setservletrequest (httpservletrequest request ){
This. Request = request;
}

Sortid = request. getparameter ("sortid ");

However, the above error is reported after use. It is found that this class does not implement the servletrequestaware interface, so this error is reported. You can use the following statement to public class script extends actionsupport implements servletrequestaware.