registaction.java

Struts数据库项目开发宝典光盘第一部分

package test;

import java.io.File;
import java.io.FileWriter;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.Calendar;
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;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;


public final class RegistAction extends Action{  
public ActionForward execute(
	ActionMapping mapping,
	ActionForm form,
	HttpServletRequest request,  
	HttpServletResponse response) throws Exception {
		
		MyActionMapping mam = (MyActionMapping)mapping;
		boolean flag = mam.getCreateLog();
		
   		UserForm userform = (UserForm) form;         
		String name = userform.getName();
		String psw = userform.getPsw();
   		String target = "registed";
   		
   		ActionErrors errors = new ActionErrors();
		if(name.equals("scott") && psw.equals("tiger")){
   			if(flag){
   				log(name);
   			}
   		}else{
   			if(!name.equals("scott")){	//不存在的用户名
				errors.add("name",
				new ActionError("error.regist.name.unknown",name));
			}else{						//用户名和密码不匹配
				errors.add(ActionErrors.GLOBAL_ERROR,
				new ActionError("error.regist.failure"));
			}
			target = "login";
		}
		if (!errors.isEmpty()) {
			saveErrors(request, errors);
		} 
   		return (mapping.findForward(target));  
	}
	
	protected void log(String name){
		Calendar today = Calendar.getInstance();
		String fileName = "logs\\app_log_" + today.get(Calendar.YEAR) 
			+ "-" + (today.get(Calendar.MONTH) + 1) + "-" 
			+ today.get(Calendar.DAY_OF_MONTH) + ".txt";
		try{	
			FileWriter fw = new FileWriter(fileName,true);
			BufferedWriter bw = new BufferedWriter(fw);
			bw.write(today.getTime().toString() + ": user " + name + " log in.\n");	
			bw.close();
		}catch(IOException e){
			e.printStackTrace();
		}	
	}
}