【Spring Boot&&Spring Cloud系列】使用Intellij构建Spring Boot和Mybatis项目

一、创建项目

1、File->New->Project->spring initializer

2、勾选Web SQL Template Engines

3、项目生成之后，点击add as maven project 这时候会自动下载jar包

4、项目生成的目录结构

其中DemoApplication.java是项目主入口，编辑run/debug configuration即可运行

5、在生成的项目中新建自己需要的包

controller

entity

mapper

service

util

resources下的static文件夹下新建

css

fonts

img

js

resources下templates下新建需要的html文件

6、修改application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/dev
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#页面热加载
spring.thymeleaf.cache=false

二、代码编写

HelloWorld.controller.java

 package com.slp.controller;

 import com.slp.entity.User;
 import com.slp.service.IRegService;
 import com.slp.util.GenerateKeyUtil;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.stereotype.Controller;
 import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;

 import java.math.BigInteger;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;

 /**
  * Created by sangliping on 2017/8/15.
  * @Controller注解返回指定页面，也就是template文件夹下的页面
  * @RestController相当于@Controller和@ResponseBody
  * springboot默认会缓存templates下的文件，如果html页面修改后，看不到修改后的效果则修改热部署为false
  */
 @Controller
 @EnableAutoConfiguration
 public class HelloWorldController {
     @Autowired
     private IRegService regService;
     @RequestMapping("/")
     String home(){
         return "index";
     }

     @RequestMapping("/reg")
     @ResponseBody
     Boolean reg(@RequestParam("loginPwd")String loginNum,@RequestParam("userId")String userId){
         System.out.println("进入注册页面");
         User user = regService.findUserById(userId);//根据用户id查询用户
         if(StringUtils.isEmpty(user)){//如果用户不存在则进行注册
             String pwd =  this.createMD5(loginNum);
             System.out.println(userId+"==="+loginNum);
             String id = GenerateKeyUtil.getCharAndNumr(20);
             regService.regUser(userId,pwd,id);
         }
      return true;
     }

     private String createMD5(String loginNum){
         MessageDigest md = null;
         try {
             md = MessageDigest.getInstance("MD5");
             md.update(loginNum.getBytes());
         }catch (NoSuchAlgorithmException e){
             e.printStackTrace();
         }
         return new BigInteger(1,md.digest()).toString();
     }

     @RequestMapping("/register")
     private String register(){
         System.out.println("进入注册页面");

         return "login";
     }
 }

User.java

 package com.slp.entity;

 /**
  * Created by sangliping on 2017/8/15.
  */
 public class User {
     private String id;
     private String userId;
     private String pwd;

     public String getId() {
         return id;
     }

     public void setId(String id) {
         this.id = id;
     }

     public String getUserId() {
         return userId;
     }

     public void setUserId(String userId) {
         this.userId = userId;
     }

     public String getPwd() {
         return pwd;
     }

     public void setPwd(String pwd) {
         this.pwd = pwd;
     }

     @Override
     public String toString() {
         return "User{" +
                 "id='" + id + '\'' +
                 ", userId='" + userId + '\'' +
                 ", pwd='" + pwd + '\'' +
                 '}';
     }
 }

UserMapper.java

 package com.slp.mapper;

 import com.slp.entity.User;
 import org.apache.ibatis.annotations.Insert;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;

 /**
  * Created by sangliping on 2017/8/15.
  */
 @Mapper
 public interface UserMapper {
     @Select("select * from users where userId = #{userId}")
     User findUserByUserId(@Param("userId") String userId);

     @Insert("insert into users(id,userId,pwd) values(#{id},#{userId},#{pwd})")
     boolean insertUsers (@Param("userId")String userId,@Param("pwd")String pwd,@Param("id")String id);
 }

IRegService.java

 package com.slp.service;

 import com.slp.entity.User;

 /**
  * Created by sangliping on 2017/8/15.
  */
 public interface IRegService {
     boolean regUser(String userId,String pwd,String id);
     User findUserById(String userId);
 }

RegService.java

 package com.slp.service;

 import com.slp.entity.User;
 import com.slp.mapper.UserMapper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;

 /**
  * Created by sangliping on 2017/8/15.
  */
 @Service()
 public class RegService implements IRegService{
     @Autowired
     private UserMapper userMapper;

     @Override
     public boolean regUser(String userId, String pwd,String id) {
         boolean  flag = userMapper.insertUsers(userId,pwd,id);
         return flag;
     }

     @Override
     public User findUserById(String userId) {
         User user = userMapper.findUserByUserId(userId);
         return user;
     }
 }

GenerateKeyUtil.java

 package com.slp.util;

 import java.util.Random;

 /**
  * Created by sangliping on 2017/8/15.
  */
 public class GenerateKeyUtil {
     public static String getCharAndNumr(int length) {
         String val = "";
         Random random = new Random();
         for (int i = 0; i < length; i++) {
             // 输出字母还是数字
             String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
             // 字符串
             if ("char".equalsIgnoreCase(charOrNum)) {
                 // 取得大写字母还是小写字母
                 int choice = random.nextInt(2) % 2 == 0 ? 65 : 97;
                 val += (char) (choice + random.nextInt(26));
             } else if ("num".equalsIgnoreCase(charOrNum)) { // 数字
                 val += String.valueOf(random.nextInt(10));
             }
         }
         return val;
     }
 }

页面index.html

 <!DOCTYPE html>
 <html xmlns="http://www.thymeleaf.org">
 <head>

     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
     <title>登陆页面</title>
     <!-- CSS -->
     <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Roboto:400,100,300,500"/>
     <link rel="stylesheet" href="/css/bootstrap.min.css"/>
     <link rel="stylesheet" href="/css/font-awesome.min.css"/>
     <link rel="stylesheet" href="/css/form-elements.css"/>
     <link rel="stylesheet" href="/css/style.css"/>

     <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
     <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
     <!--[if lt IE 9]>
     <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
     <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
     <![endif]-->

     <!-- Favicon and touch icons -->
     <link rel="shortcut icon" href="/img/favicon.png"/>
     <link rel="apple-touch-icon-precomposed" sizes="144x144" href="/img/apple-touch-icon-144-precomposed.png"/>
     <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/img/apple-touch-icon-114-precomposed.png"/>
     <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/img/apple-touch-icon-72-precomposed.png"/>
     <link rel="apple-touch-icon-precomposed" href="/img/apple-touch-icon-57-precomposed.png"/>

 </head>

 <body>

 <!-- Top content -->
 <div class="top-content">

     <div class="inner-bg">
         <div class="container">
             <div class="row">
                 <div class="col-sm-8 col-sm-offset-2 text">
                     <h3>没有账户请先<a href="http://localhost:8080/register">注册</a> </h3>
                     <div class="description">
                         <p>

                         </p>
                     </div>
                 </div>
             </div>
             <div class="row">
                 <div class="col-sm-6 col-sm-offset-3 form-box">
                     <div class="form-top">
                         <div class="form-top-left">
                             <h3>登 陆</h3>
                             <p>输入用户名和密码:</p>
                         </div>
                         <div class="form-top-right">
                             <i class="fa fa-key"></i>
                         </div>
                     </div>
                     <div class="form-bottom">
                         <form role="form" action="" method="post" class="login-form">
                             <div class="form-group">
                                 <label class="sr-only" for="form-username">用户名</label>
                                 <input type="text" name="form-username" placeholder="请输入用户名" class="form-username form-control" id="form-username"/>
                             </div>
                             <div class="form-group">
                                 <label class="sr-only" for="form-password">密  码</label>
                                 <input type="password" name="form-password" placeholder="请输入密码" class="form-password form-control" id="form-password"/>
                             </div>
                             <button type="submit" class="btn">登 陆!</button>
                         </form>
                     </div>
                 </div>
             </div>
             <div class="row">
                 <div class="col-sm-6 col-sm-offset-3 social-login">
                     <h3>或者使用第三方账户登陆:</h3>
                     <div class="social-login-buttons">
                         <a class="btn btn-link-1 btn-link-1-facebook" href="#">
                             <i class="fa fa-facebook"></i> Facebook
                         </a>
                         <a class="btn btn-link-1 btn-link-1-twitter" href="#">
                             <i class="fa fa-twitter"></i> Twitter
                         </a>
                         <a class="btn btn-link-1 btn-link-1-google-plus" href="#">
                             <i class="fa fa-google-plus"></i> Google Plus
                         </a>
                     </div>
                 </div>
             </div>
         </div>
     </div>

 </div>

 <!-- Javascript -->
 <script src="/js/jquery-1.11.1.min.js"></script>
 <script src="/js/bootstrap.min.js"></script>
 <script src="/js/jquery.backstretch.min.js"></script>
 <script src="/js/scripts.js"></script>

 <!--[if lt IE 10]>
 <script src="/js/placeholder.js"></script>
 <![endif]-->

 </body>
 </html>

启动预览

到此为止使用Intellij创建Spring boot+mybatis的简单的项目就完成了

表结构：