struts+spring 传统做法

传统的做法

/*

 * Generated by MyEclipse Struts

 * Template path: templates/java/JavaClass.vtl

 */

package prj23_1.action;

 

import javax.servlet.ServletContext;

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.springframework.web.context.WebApplicationContext;

import org.springframework.web.context.support.WebApplicationContextUtils;

 

import prj23_1.form.LoginForm;

import dao.CustomerDao;

import dao.IDAO;

 

public class LoginAction extends Action {

 

       public ActionForward execute(ActionMapping mapping, ActionForm form,

                     HttpServletRequest request, HttpServletResponse response) {

              LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub

              String account = loginForm.getAccount();

              String password = loginForm.getPassword();

              //在此调用Dao

              CustomerDao cs=new CustomerDao();

              cs.getCusomerByAccount(account);

              return new ActionForward("/login.jsp");

       }

}

 

 

===========================================

 

 

 

CustomerDao.java

 

 

package dao;

 

import po.Customer;

 

public class CustomerDao implements IDAO{

    public Customer getCusomerByAccount(String account){

       System.out.println("Dao作查询，账号是:" + account);

       return null;

    }

}

=-=================================

Customer.java

 

package po;

 

public class Customer {

 

}

 

 

 

 

 

 

====================================

 

可以看到LoginAction中CustomerDao cs=new CustomerDao();

是入侵式代码，开发Action的人员就要知道多少个Dao，要用到哪个Dao。

 所以不好。

解决方案：

可以用接口来管理Dao，并且创建对象由spring来管理。

看下一节。