注册功能_后台_Servlet代码实现与注册功能_后台_Dao代码实现

注册功能_后台_Servlet代码实现

　　　   1. 编写RegistUserServlet

package cn.itcast.travel.web.servlet;

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

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

@WebServlet("/registUserServlet")
public class RegistUserServlet extends HttpServlet {


    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                //1.获取数据
        Map<String, String[]> map = request.getParameterMap();
                //2.封装对象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
        //3.调用service完成注册
        UserServiceImpl service = new UserServiceImpl();
        boolean flag =  service.regist(user);
        ResultInfo info = new ResultInfo();
        //4.响应结果
        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
        ObjectMapper mapper = new ObjectMapper();
        mapper.writeValueAsString(info);

        //将inof数据写回客户端
        //设置content-type
        response.setContentType("application/json;charset=utf-8");
        response.getWriter().write(json);

    }

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

 

　　　　2.编写UserService以及UserServiceImpl

package cn.itcast.travel.service;

import cn.itcast.travel.domain.User;

public interface UserService {
    /**
     * 注册用户
     * @param user
     * @return
     */
    boolean regist(User user);
}

 

package cn.itcast.travel.service.impl;

import cn.itcast.travel.domain.User;
import cn.itcast.travel.service.UserService;

public class UserServiceImpl implements UserService   {

    /**
     * 注册用户
     * @param user
     * @return
     */
    @Override
    public boolean regist(User user) {
        //1.根据用户名查询用户对象

        //2.保存用户信息
        return false;
    }
}

 

注册功能_后台_Dao代码实现

　　　1. 编写UserDao以及UserDaoImpl

package cn.itcast.travel.dao;

import cn.itcast.travel.domain.User;

public interface UserDao {

    /**
     * 根据用户名查询用户信息
     * @param username
     * @return
     */
    public User findByUsernam(String username);

    public void seve(User user);
}

 

package cn.itcast.travel.dao.impl;

import cn.itcast.travel.dao.UserDao;
import cn.itcast.travel.domain.User;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

public class UserDaoimpl implements UserDao {

    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());

    @Override
    public User findByUsernam(String username) {
        //1.定义sql
        String sql = "select * from tab_user where username =?";
        //执行sql
        User user = template.queryForObject(sql, new BeanPropertyRowMapper<>(User.class));

        return user;
    }

    @Override
    public void seve(User user) {
        //定义sql
        String sql  ="insert into user(username,password,name,birthday,sex,telephone,email) values(?,?,?,?,?,?,?)";
        //执行sql
        template.update(sql,user.getUsername(),
                user.getPassword(),
                user.getName(),
                user.getBirthday(),
                user.getSex(),
                user.getTelephone(),
                user.getEmail());

    }
}

 

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