安装使用Spring boot 写一个hello1

一、创建springboot 项目

二、进行代编写

1.连接数据库：application.properties里配置

spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver

spring.datasource.url=jdbc:mysql://localhost:3306/huoguo?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC

spring.datasource.username=root

spring.datasource.password=123456

spring.jpa.showSql=true

mybatis.type-aliases-package=com.xiaojungan.huoguo.entity

mybatis.mapper-locations=mybatis/*.xml

2.用户实体 entity.User:

package com.xiaojungan.huoguo.entity;

public class User {

    private Integer id;

    private String name;

    private Integer password;

    private Integer canzhuo_id;

    public User(){

    }

    public User(Integer id, String name, Integer password,Integer canzhuo_id ) {

        this.id = id;

        this.name = name;

        this.password = password;

        this.canzhuo_id  = canzhuo_id ;

    }

    public Integer getId() {

        return id;

    }

    public void setId(Integer id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Integer getPassword() {

        return password;

    }

    public void setPassword(Integer password) {

        this.password = password;

    }

    public Integer getCanzhuo_id() {

        return canzhuo_id;

    }

    public void setCanzhuo_id(Integer canzhuo_id) {

        this.canzhuo_id = canzhuo_id;

    }

}

3.UserDao

package com.xiaojungan.huoguo.dao;

import com.xiaojungan.huoguo.entity.User;

import org.apache.ibatis.annotations.Param;

public interface UserDao {

    //登录判断

    User login(User user);

    //注册

    int addUser(User user);

    int adduser(@Param("name") String name, @Param("password") Integer password);

}

4.UserDaoImpl

package com.xiaojungan.huoguo.dao.impl;

import com.xiaojungan.huoguo.dao.UserDao;

import com.xiaojungan.huoguo.entity.User;

public class UserDaoImpl implements UserDao {

    @Override

    public User login(User user) {

        return null;

    }

    @Override

    public int addUser(User user) {

        return 0;

    }

    @Override

    public int adduser(String name, Integer password) {

        return 0;

    }

}

5.控制层 UserController.

package com.xiaojungan.huoguo.controller;

import com.xiaojungan.huoguo.dao.impl.UserDaoImpl;

import com.xiaojungan.huoguo.entity.User;

import com.xiaojungan.huoguo.dao.UserDao;

import com.xiaojungan.huoguo.service.UserService;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpSession;

import org.springframework.web.bind.annotation.*;

@Controller

public class UserController {

    @Resource

    UserDao ad = new UserDaoImpl();

    @RequestMapping("/login")//主页

    public String index(){

        return "login";

    }

    @RequestMapping("/goregister1")//去注册页面

    public String goregister(){

        return  "register1";

    }

    @RequestMapping("/gologin")//登录获取用户信息存到seccion

    public String  login(User user,HttpServletRequest request,Model model){

        User aa= ad.login(user);

        if (aa==null){

            return  "public/false";

        }

        HttpSession session =  request.getSession();

        session.setAttribute("name",user.getName());

        session.setAttribute("password",user.getPassword());

        model.addAttribute("user",aa);

        return "user/index";

    }

    @RequestMapping("/index")//从其他页面操作后返回列表页面（重复登录）

    public String login(User user,Model model,HttpServletRequest request){

        HttpSession session =  request.getSession();

        user.setName((String) session.getAttribute("aname"));

        user.setPassword((Integer) session.getAttribute("apassword"));

        User aa = ad.login(user);

        model.addAttribute("user",aa);

        return "user/index";

    }

    @RequestMapping(value = {"/register1"})

    public String adduser(@RequestParam("name") String username,

                          @RequestParam("password") Integer password,

                          @RequestParam("password2") Integer password2){

        if (!password.equals(password2)) {

            return "/user/wrong";

        } else {

            int res = ad.adduser( username, password);

            if (res == 0) {

                return "/user/wrong";

            } else {

                return "/login";

            }

        }

    }

}

6.application中配置

package com.xiaojungan.huoguo;

import org.springframework.boot.SpringApplication;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

@MapperScan("com.xiaojungan.huoguo.dao")

public class HuoguoApplication {

    public static void main(String[] args) {

        SpringApplication.run(HuoguoApplication.class, args);

    }

}

7.UserMapper.xml 设置数据库语句的操作

<?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.xiaojungan.huoguo.dao.UserDao">

    <select id="login" parameterType="com.xiaojungan.huoguo.entity.User" resultType="com.xiaojungan.huoguo.entity.User">

        select name,password FROM user WHERE name = #{name} AND password = #{password}

    </select>

    <insert id="addUser" parameterType="com.xiaojungan.huoguo.entity.User">

        INSERT INTO user(name,password) VALUES (#{name},#{password});

    </insert>

    <insert id="adduser">

        INSERT INTO user (name,password) VALUES (#{name},#{password})

    </insert>

</mapper>

8.登录页面 login.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>首页</title>

    <link href="user/css/1.css" type="text/css" rel="stylesheet"/>

    <style>

        /*a标签去下划线和点击不变色，div内容居中*/

        a{

            text-decoration: none;

            color: #333333;

        }

        #idiv{text-align: center;border-radius: 20px;

                            width: 300px;

                            height: 350px;

                            margin: auto;

                            position: absolute;

                            top: 0;

                            left: 0;

                            right: 0;

                            bottom: 0;}

    </style>

</head>

<body  background="../../../../../../java%20%20work/huoguo/src/main/webapp/user/img/2.jpg">

<div id="idiv">

    <form action="/gologin" method="post">

        请输入姓名<input id="name" name="name" required="required"><br><br>

        请输入密码<input id="password" name="password" type="password" placeholder="仅支持正整数" required="required"><br><br>

        <input type="submit" value="登录"> &nbsp;<button>

        <a href="/goregister1">注册</a></button>

    </form>

</div>

</body>

</html>

9.注册页面 register1.html

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>注册</title>

</head>

<body>

<form action="/register1" method="post">

    用户姓名:<input type="text" name="name" /></br>

    用户密码:<input type="password" name="password" placeholder="仅支持整数" /></br>

    确认密码:<input type="password" name="password2" placeholder="仅支持整数" /></br>

    <input type="submit" value="注册">

</form>

</body>

</html>

10.index.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>使用spring boot写一个hello1</title>

</head>

<body>

      Hello1

</body>

</html>

11运行结果：

巴特西

安装使用Spring boot 写一个hello1

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