项目描述：在微信小程序中通过与Springboot操作数据库实现简单的增删改查，其中我是用springboot整合mybatis-plus 和mysql使用的。

1. 开发前准备

1.1 前置知识

• java基础
• SpringBoot简单基础知识

1.2 环境参数

• 开发工具：IDEA
• 基础环境：Maven+JDK8
• 主要技术：SpringBoot、lombok、mybatis-plus、mysql 、微信小程序
• SpringBoot版本：2.2.6

2.开发者服务器

项目结构：

2.1 初始配置

（1）pom.xml配置

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>

        <!--模板引擎-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!-- 引入阿里数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.14</version>
        </dependency>

        <!-- mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.42</version>
            <scope>runtime</scope>
        </dependency>

        <!-- mybatisPlus 核心库 -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.0</version>
        </dependency>

        <!--生成实体成get set-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- pagehelper 分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>

        <!--junit 测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

（2）application.yml

# Spring Boot 的数据源配置
spring:
  datasource:
    name: wx
    url: jdbc:mysql://localhost:3306/wx_mini_program?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
 username: root
    password: root
    # 使用druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    filters: stat
    maxActive: 20 initialSize: 1 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxPoolPreparedStatementPerConnectionSize: 20 maxOpenPreparedStatements: 20 # mybatis-plus相关配置
mybatis-plus:
  # xml扫描，多个目录用逗号或者分号分隔（告诉 Mapper 所对应的 XML 文件位置）
  mapper-locations: classpath:mapper/*.xml
  # 以下配置均有默认值,可以不设置
  global-config:
    db-config:
      #主键类型 AUTO:"数据库ID自增" INPUT:"用户输入ID",ID_WORKER:"全局唯一ID (数字类型唯一ID)", UUID:"全局唯一ID UUID";
      id-type: auto
      #字段策略 IGNORED:"忽略判断"  NOT_NULL:"非 NULL 判断")  NOT_EMPTY:"非空判断"
      field-strategy: NOT_EMPTY
      #数据库类型
      db-type: MYSQL

  # 指定实体类的包
  type-aliases-package: com.ckf.login_wx.entity
  configuration:
    # 是否开启自动驼峰命名规则映射:从数据库列名到Java属性驼峰命名的类似映射
    map-underscore-to-camel-case: true
    # 如果查询结果中包含空值的列，则 MyBatis 在映射的时候，不会映射这个字段
    call-setters-on-nulls: true
    # 这个配置会将执行的sql打印出来，在开发或测试的时候可以用
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

# PageHelper分页插件
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

2.2 小程序用户表

CREATE table users(
 id int not null PRIMARY key auto_increment,
 name varchar(255) not null,
 age int not null );

insert into users value(null,'陈克锋',18);
insert into users value(null,'陈克帅',11);
insert into users value(null,'陈克兵',14); select * from users;

2.3 pojo

2.4 mapper

2.5 service

2.5 serviceImpl

配置SpringBoot扫描mapper

2.6 controller

LoginController

package com.ckf.login_wx.controller;

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map; /**
 * @author 安详的苦丁茶
 * @date 2020/4/30 11:46 */ @RestController public class LoginController { /**
     * 登录
     * @param phone
     * @param password
     * @return */ @PostMapping("/doLogin") public Map doLogin(String phone, String password){
        Map map = new HashMap(); if ((phone.equals("10086")&& password.equals("123456"))){
            map.put("code",200);
            map.put("result","登录成功");
            System.out.println("登录成功");
        }else {
            map.put("result","no");
        } return map;
    }

}

UserController

package com.ckf.login_wx.controller;

import com.ckf.login_wx.entity.User;
import com.ckf.login_wx.servic.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*; /**
 * @author 安详的苦丁茶
 * @date 2020/4/30 13:39 */ @RestController
@RequestMapping("/test") public class UserController {

    @Autowired private UserService userService; /**
     * 查询全部
     * @return */ @GetMapping("/list") public Object list(){
        System.out.println("查询成功"); return userService.list();
    } /**
     * 根据id删除
     * @param id
     * @return */ @GetMapping("/delete") public boolean delete(Integer id){
        System.out.println("删除成功"); return userService.removeById(id);
    } /**
     *  根据id查询
      * @param id
     * @return */ @GetMapping("/byid") public Object byid(Integer id){
        System.out.println("查询成功"); return userService.getById(id);
    } /**
     *  修改
     * @param user
     * @return */ @PostMapping("/update") public boolean update(@RequestBody User user){
        System.out.println("修改成功"); return userService.updateById(user);
    } /**
     * 添加
     * @param user
     * @return */ @PostMapping("/add") public boolean add(@RequestBody User user){
        System.out.println("添加成功"); return userService.save(user);
    }

}

3. 微信小程序

域名拍卖平台地图项目结构：

3.1 初始配置

3.2 bing.wxml

<!--pages/bind/bind.wxml-->
<view>

  <form bindsubmit='doLogin'>
            <!--账号-->
            <view class="inputView">

                <label class="loginLabel">账号</label>
                <input name="phone" value='10086' class="inputText" placeholder="请输入账号" />
            </view>
            <view class="line"></view>

            <!--密码-->
            <view class="inputView">

                <label class="loginLabel">密码</label>
                <input name="password" value='123456' class="inputText" password="true" placeholder="请输入密码" />
            </view>
            <view class="line"></view>
            <!--按钮-->
            <view class='backColor'>
                <button class="loginBtn" formType="submit"  open-type='getUserInfo' >登录</button>
            </view>

            <!-- <view>
                <button type="warn" open-type='getUserInfo' bindgetuserinfo='doLogin'>微信登录</button>
            </view> -->
        </form>

</view>

3.3 bing.js

3.3 list.wxml

<!--pages/list/list.wxml-->
  <button class="add" type='primary' bindtap='addArea'>添加</button>
<view class="container">
  <view class='widget'>
    <text class='column'>编号</text>
    <text class='column'>姓名</text>
    <text class='column'>年龄</text>
    <text class='link-column'>操作</text>
  </view>
  <scroll-view scroll-y="true">
    <view>
      <block wx:for='{{list}}'>
      <view class='widget'> 
        <text class='column'>{{item.id}}</text>
        <text class='column'>{{item.name}}</text>
         <text class='column'>{{item.age}}</text>
        <view class='link-column'>
          <navigator class='link' url='../operation/operation?id={{item.id}}'>编辑</navigator> |
          <text class='link' bindtap='deleteArea' >'{{item.id}}' >'{{item.name}}' >'{{index}}'>删除</text>  
        </view>
        </view>      
      </block>
    </view>
  </scroll-view>

</view>

3.4 list.js

// pages/list/list.js
Page({ /**
   * 页面的初始数据 */ data: {
    list:[]
  }, /**
   * 生命周期函数--监听页面加载 */ onLoad: function (options) {

  }, /**
   * 生命周期函数--监听页面初次渲染完成 */ onReady: function () {

  }, /**
   * 生命周期函数--监听页面显示 */ onShow: function () { var that=this;
    wx.request({
      url: 'http://localhost:8080/test/list',
      method:'GET',
      data:{},
      success:function(res){ var list=res.data; if(list==null){ var toastText='获取数据失败';
          wx.showToast({
            title: toastText,
            icon:'',
            duration:2000 //弹出时间
 })
        }else{
          that.setData({
            list:list
          })
        }
      }
    })
  }, /**
   * 生命周期函数--监听页面隐藏 */ onHide: function () {

  }, /**
   * 生命周期函数--监听页面卸载 */ onUnload: function () {

  }, /**
   * 页面相关事件处理函数--监听用户下拉动作 */ onPullDownRefresh: function () {

  }, /**
   * 页面上拉触底事件的处理函数 */ onReachBottom: function () {

  }, /**
   * 用户点击右上角分享 */ onShareAppMessage: function () {

  },
  addArea:function(){
    wx.navigateTo({
      url:'../operation/operation' })
  },
  deleteArea: function (e) { var that=this;
    wx.showModal({
      title: '提示',
      content: '确定要删除[' + e.target.dataset.areaname +']吗？',
      success:function(sm){ if(sm.confirm){
          wx.request({
            url: 'http://localhost:8080/test/delete',
            data: { id: e.target.dataset.areaid},
            method:'GET',
            success:function(res){ var result=res.statusCode; var toastText="删除成功"; if(result!=200){
                toastText = "删除失败";
              }else{
                that.data.list.splice(e.target.dataset.index,1);
                that.setData({
                  list:that.data.list
                });
              }
              wx.showToast({
                title: toastText,
                icon:'',
                duration:2000 });
            }
          })
        }
      }
    })

  }
})

3.5 app.json

{ "pages": [ "pages/bind/bind", "pages/list/list", "pages/logs/logs", "pages/operation/operation", "pages/index/index" ], "window": { "backgroundColor": "#F6F6F6", "backgroundTextStyle": "light", "navigationBarBackgroundColor": "#29d", "navigationBarTitleText": "login", "navigationBarTextStyle": "black" }, "sitemapLocation": "sitemap.json", "style": "v2" }

4. 测试

启动开发者服务器，启动SpringBoot的main方法。打开微信小程序开发者工具登录页面首页添加页面修改页面删除到处基本的增删改查操作已经完成了