注册页面的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 java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

/**
 * @author newcityman
 * @date 2019/9/26 - 0:16
 */
@WebServlet("/registUserServlet")
public class RegistUserServlet extends HttpServlet {
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 //1、获取参数
 Map<String, String[]> map = request.getParameterMap();
 //2、封装对象User
 User user = new User();
 try {
 BeanUtils.populate(user,map);
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 } catch (InvocationTargetException e) {
 e.printStackTrace();
 }
 //3、调用service方法
 UserService service = new UserServiceImpl();
 Boolean flag=service.regist(user);
 ResultInfo info = new ResultInfo();
 //4、响应数据
 if (flag){
 //注册成功
 info.setFlag(true);
 }else{
 //注册失败
 info.setFlag(false);
 info.setErrorMsg("注册失败");
 }
 
 //将info对象序列化为json数据，写回客户端
 ObjectMapper mapper = new ObjectMapper();
 String json = mapper.writeValueAsString(info);
 response.setContentType("application/json;charset=utf-8");
 response.getWriter().write(json);
 }

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