blog--用户登录与注册

1.注册signUp

将用户注册到数据库（使用INSERT来插入）

userMapper.java（接口）

package com.xueba.boke.dao;


import com.xueba.boke.bean.User;
import org.springframework.stereotype.Repository;

@Repository
public interface UserMapper {
    public void login(User user);


}

　　

userMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xueba.boke.dao.UserMapper">


    <!--public void login(User user);-->
    <!-- parameterType：参数类型，可以省略，
	    获取自增主键的值：
		mysql支持自增主键，自增主键值的获取，mybatis也是利用statement.getGenreatedKeys()；
		useGeneratedKeys="true"；使用自增主键获取主键值策略
		keyProperty；指定对应的主键属性，也就是mybatis获取到主键值以后，将这个值封装给javaBean的哪个属性
	-->
    <insert id="login" parameterType="com.xueba.boke.bean.User" useGeneratedKeys="true" keyProperty="id">
        INSERT INTO userInfo(name, password) VALUES(${userName}, ${userPwd})
    </insert>
</mapper>

　　

注册之后返回到登录界面

使用redirect:../login.jsp进行转发

@RequestMapping(value="/signUp", method=RequestMethod.POST)
    public String signUp(HttpServletRequest request, HttpServletResponse response){
        String name = request.getParameter( "userName" );
        String email = request.getParameter("Email");
        String password = request.getParameter("Password");
        System.out.println("----------" + email);

        User user = new User(name, password, email);
        System.out.println("user: " + user);
        userService.signUp( user );
        return "redirect:../login.jsp";

    }

　　

　　

 2.用户登录

回显问题

 开启驼峰命名

属性mapUnderscoreToCamelCase表示是否启用下划线与驼峰式命名规则的映射（如 => ）。其实mybatis是支持数据库属性和实体对象的驼峰命名映射，只需要开启这个配置即可。 

数据库字段，我们一般都用下划线分隔  first_name

但是Model中的属性，一般用驼峰命名   firstName

如果需要自动映射，则配置mybatis-config.xml文件  JavaEE——Mybatis（13）--MyBatis与Spring整合--Spring SpringMVC相关配置文件 及Spring整合MyBatis

UserController.java中

package com.xueba.boke.controller;

import com.xueba.boke.bean.User;
import com.xueba.boke.service.UserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Create by yyq on 2018/1/17
 */
@Controller
@RequestMapping("/user")
public class UserController {
    private static Logger log= LoggerFactory.getLogger(UserController.class);

    @Autowired
    UserService userService;

    @RequestMapping(value="/login",method= RequestMethod.POST)
    public String login(HttpServletRequest request, HttpSession httpSession){

        String  userName = request.getParameter("userName");
        String userPwd = request.getParameter("userPwd");
        User visitor=new User(userName, userPwd);
        System.out.println("visitor: " + visitor);
        User user = userService.login(visitor);
        /*添加日志*/
        log.debug(user.toString());
        if(user == null){
            System.out.println("用户不存在");
            return "login";
        }else{
            if(!user.getUserPwd().equals(visitor.getUserPwd())){
                System.out.println("密码不正确");
                return "login";
            } else{
                System.out.println("user" + user);
                httpSession.setAttribute("user", user);
                return "index";
            }
        }
    }


    @RequestMapping(value="/signUp", method=RequestMethod.POST)
    public String signUp(HttpServletRequest request, HttpServletResponse response){
        String name = request.getParameter( "userName" );
        String email = request.getParameter("Email");
        String password = request.getParameter("Password");

        User user = new User(name, password, email);
        userService.signUp( user );
        return "redirect:../login.jsp";
    }


}

　　

UserServiceImpl.java

package com.xueba.boke.serviceImp;

import com.xueba.boke.bean.User;
import com.xueba.boke.dao.UserMapper;
import com.xueba.boke.service.UserService;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Map;

/**
 * Create by yyq on 2018/1/17
 */
@Service("UserService")
public class UserServiceImpl implements UserService{

    @Autowired
    UserMapper userMapper;

    @Override
    public User login(User visitor) {
        return userMapper.login(visitor.getUserName());
    }

    public void signUp(User user) {
        userMapper.signUp( user );
    }


}

　　

UserMapper.java接口

package com.xueba.boke.dao;


import com.xueba.boke.bean.User;
import org.springframework.stereotype.Repository;

/**
 * Create by yyq on 2018/1/17
 */
@Repository
public interface UserMapper {

    public User login(String userName);

    public void signUp(User user);

}

　　

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xueba.boke.dao.UserMapper">

    <!--public User login(String userName);
    SELECT user_name as userName, user_pwd as userPwd FROM userInfo WHERE user_name=#{userName}-->
    <select id="login" resultType="com.xueba.boke.bean.User" parameterType="java.lang.String">
        SELECT * FROM userInfo WHERE user_name=#{userName}
    </select>


    <!--public void signUp(User user);-->
    <!-- parameterType：参数类型，可以省略，
	    获取自增主键的值：
		mysql支持自增主键，自增主键值的获取，mybatis也是利用statement.getGenreatedKeys()；
		useGeneratedKeys="true"；使用自增主键获取主键值策略
		keyProperty；指定对应的主键属性，也就是mybatis获取到主键值以后，将这个值封装给javaBean的哪个属性
	-->
    <insert id="signUp" parameterType="com.xueba.boke.bean.User" useGeneratedKeys="true" keyProperty="id">
        INSERT INTO userInfo(user_name, user_pwd, email) VALUES(#{userName}, #{userPwd}, #{email})
    </insert>




</mapper>