一个action类

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.test.service.UserService;

public class ListUserAction extends ActionSupport
{
 private UserService service;

 public UserService getService()
 {
  return service;
 }

 public void setService(UserService service)
 {
  this.service = service;
 }

 @SuppressWarnings("unchecked")
 @Override
 public String execute() throws Exception
 {
  Map request = (Map) ActionContext.getContext().get("request");

  request.put("list", service.findAll());

  return SUCCESS;
 }
}