javaEE通过MVC模式实现注册登入案例的myeclipse工程

package com.itheima.web.controller; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.beanutils.BeanUtils; import org.apache.commons.beanutils.ConvertUtils; import org.apache.commons.beanutils.locale.converters.DateLocaleConverter; import com.itheima.domain.User; import com.itheima.exception.UserExistException; import com.itheima.service.BusinessService; import com.itheima.service.impl.BusinessServiceImpl; import com.itheima.util.FillBeanUtil; import com.itheima.web.beans.UserFormBean; //编码重点。完成注册 public class RegistServlet extends HttpServlet { private BusinessService s = new BusinessServiceImpl(); public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String encoding = "UTF-8"; request.setCharacterEncoding(encoding); response.setContentType("text/html;charset="+encoding); //获取表单数据，封装到JavaBean中。引入FormBean：特点属性和表单字段完全一致。且都是String类型。封装错误消息。 UserFormBean formBean = FillBeanUtil.fillBean(request, UserFormBean.class); //数据验证：服务器端验证。实际开发中：客户端+服务器端验证。 if(!formBean.validate()){ //不通过：回显数据，消息提示 request.setAttribute("formBean", formBean); request.getRequestDispatcher("/regist.jsp").forward(request, response); return; } //填充模型：formBean---->JavaBean User user = new User(); // user.setUsername(formBean.getUsername()); // user.setPassword(formBean.getPassword()); // user.setEmail(formBean.getEmail()); // DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); // try { // user.setBirthday(df.parse(formBean.getBirthday())); // } catch (ParseException e) { // e.printStackTrace(); // } ConvertUtils.register(new DateLocaleConverter(), Date.class);//注册类型转换器 try { BeanUtils.copyProperties(user, formBean); } catch (Exception e) { e.printStackTrace(); } //通过：调用Service保存数据 try { s.regist(user); response.getWriter().write("保存成功！2秒后转向主页"); response.setHeader("Refresh", "2;URL="+request.getContextPath()); } catch (UserExistException e) { //数据回显和提示 formBean.getErrors().put("username", "用户名已经存在了"); request.setAttribute("formBean", formBean); request.getRequestDispatcher("/regist.jsp").forward(request, response); return; } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }