2020.05.12 综合练习第一天

Servlet：

package cn.itcast.travel.web.servlet;

import cn.itcast.travel.domain.ResultInfo;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;
import cn.itcast.travel.service.impl.UserServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.BeanUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

/**
 * @author aojie
 * @fuction
 * @create 2020-05-12 21:38
 */
@WebServlet("/registerUserServlet")
public class RegisterUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //校验验证码
        String check = request.getParameter("check");
        HttpSession session = request.getSession();
        Object checkcode = session.getAttribute("CHECKCODE_SERVER");
        String checkcode2=(String)checkcode;
        //为了保证验证码只能使用一次
        session.removeAttribute("CHECKCODE_SERVER");
        if (checkcode2==null||!checkcode2.equalsIgnoreCase(check)) {
            //验证不通过
            ResultInfo info=new ResultInfo();
            info.setFlag(false);
            info.setErrorMsg("验证码错误");
            ObjectMapper objectMapper = new ObjectMapper();
            response.setContentType("application/json;charset=utf-8");
            objectMapper.writeValue(response.getWriter(),info);
            return;
        }

        //获取数据
        Map<String, String[]> map = request.getParameterMap();
        //封装对象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        //调用service方法
        UserService service = new UserServiceImpl();
        boolean regist = service.regist(user);
        ResultInfo info = new ResultInfo();
        //响应结果
        if (regist){
            //注册成功
            info.setFlag(true);
        }else{
            //注册失败
            info.setFlag(false);
            info.setErrorMsg("注册失败！");
        }
        //将info对象转为json 并返回给客户端
        ObjectMapper objectMapper = new ObjectMapper();
        response.setContentType("application/json;charset=utf-8");
        objectMapper.writeValue(response.getWriter(),info);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}