computeaction.java

struts入门的一个很好的

package com.bjsxt.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class ComputeAction extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		ComputeActionForm caf = (ComputeActionForm)form;
		int value1 = caf.getValue1();
		String flag = caf.getFlag();
		int value2 = caf.getValue2();
		
//		request.setAttribute("value1", value1);
//		request.setAttribute("flag", flag);
//		request.setAttribute("value2", value2);
		
		int result = 0;
		try {
			if ("+".equals(flag)) {
				result = value1 + value2;
			}else if ("-".equals(flag)) {
				result = value1 - value2;
			}else if ("*".equals(flag)) {
				result = value1 * value2;
			}else if ("/".equals(flag)) {
				result = value1 / value2;
			}	
			request.setAttribute("result", result);
			return mapping.findForward("success");
		}catch(Exception e) {
			e.printStackTrace();
		}
		return mapping.findForward("error");
	}

}