springmvc框架写的一个入门级程序

package cn.com.hnty.web.controller; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; import cn.com.hnty.entity.Account; public class LoginController extends AbstractController { private String formView; private String successView; @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { // TODO Auto-generated method stub // 1、获取账户和密码 String cardNo = request.getParameter("cardNo"); String password = request.getParameter("password"); // 2、调用业务逻辑方法进行判断，在这里弱化业务的处理，直接在Controller里的方法进行业务判断 Account account = getAccount(cardNo, password); // 3、根据结果返回不同的ModelAndView对象 Map<String, Object> model = new HashMap<String, Object>(); if (account != null) { model.put("account", account); return new ModelAndView(getSuccessView(), model); } else { model.put("error", "卡号或密码不正确"); return new ModelAndView(getFormView(), model); } } public Account getAccount(String cardNo, String password) { if ("123".equals(cardNo) && "123".equals(password)) { Account account = new Account(); account.setCardNo(cardNo); account.setBalance(88.8f); return account; } else { return null; } } public String getFormView() { return formView; } public void setFormView(String formView) { this.formView = formView; } public String getSuccessView() { return successView; } public void setSuccessView(String successView) { this.successView = successView; } }