整合Mybatisplus

1、依赖

父工程进行版本控制

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zjazn</groupId>
    <artifactId>gopoint</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.1.3.RELEASE</version>
    </parent>
    <modules>
        <module>point-service</module>
        <module>point-common</module>
    </modules>
    <packaging>pom</packaging>



    <!--统一管理jar包版本-->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

   <dependencyManagement>
       <!--子模块继承之后，提供作用：锁定版本+子module不用groupId和version-->
       <dependencies>
            
          ...

           <!--mybatis-plus-->
           <dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <version>5.1.47</version>
           </dependency>
           <dependency>
               <groupId>com.baomidou</groupId>
               <artifactId>mybatis-plus-boot-starter</artifactId>
               <version>3.4.0</version>
           </dependency>
           <dependency>
               <groupId>com.baomidou</groupId>
               <artifactId>mybatis-plus-generator</artifactId>
               <version>3.4.0</version>
           </dependency>
           <dependency>
               <groupId>org.apache.velocity</groupId>
               <artifactId>velocity-engine-core</artifactId>
               <version>2.0</version>
           </dependency>

       </dependencies>
   </dependencyManagement>




</project>

子模块

<!--mybatis-plus依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
        </dependency>
        <!-- 模板引擎 -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
        </dependency>

2、代码生成器

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.Test;

/**
 * @author
 * @since 2018/12/13
 */
public class CodeGenerator {

    @Test
    public void run() {

        // 1、创建代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 2、全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        //代码生成的绝对路径！！
        gc.setOutputDir("D:\\code\\i\\GoPoint\\point_service\\src\\main\\java\\");

        gc.setAuthor("testjava");
        gc.setOpen(false); //生成后是否打开资源管理器
        gc.setFileOverride(false); //重新生成时文件是否覆盖

        //UserServie
        gc.setServiceName("%sService");    //去掉Service接口的首字母I

        gc.setIdType(IdType.ID_WORKER_STR); //主键策略
        gc.setDateType(DateType.ONLY_DATE);//定义生成的实体类中日期类型
        gc.setSwagger2(true);//开启Swagger2模式

        mpg.setGlobalConfig(gc);

        // 3、数据源配置 ！！
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://数据库ip:3306/数据库名?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("3333");
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);

        // 4、包配置！！！
        PackageConfig pc = new PackageConfig();
        //包  com.atguigu.eduservice
        pc.setParent("com.zjazn");
        pc.setModuleName("point_service"); //模块名

        //包  com.atguigu.eduservice.controller
        pc.setController("controller");
        pc.setEntity("entity");
        pc.setService("service");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);

        // 5、策略配置
        StrategyConfig strategy = new StrategyConfig();

        //哪些表要生成！！
        strategy.setInclude("point");

        strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
        strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀

        strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
        strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作

        strategy.setRestControllerStyle(true); //restful api风格控制器
        strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符

        mpg.setStrategy(strategy);


        // 6、执行
        mpg.execute();
    }
}

生成的代码还需要一个依赖 Swagger的依赖

<!--swagger-->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.7.0</version>
</dependency>
<!--swagger ui-->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.7.0</version>
</dependency>

3、再配置

启动类

@MapperScan(basePackages = {"com.zjazn.*.mapper"})

application.yml

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://数据库ip/数据库名?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 3333
  main:
    allow-bean-definition-overriding: true
  mvc:
    throw-exception-if-no-handler-found: true

mybatis-plus:
  mapper-locations: classpath:com/zjazn/point_service/mapper/xml/*.xml

4、使用示例

package com.zjazn.point_service.controller;


import com.alibaba.fastjson.JSON;
import com.zjazn.point_service.entity.Point;
import com.zjazn.point_service.service.PointService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

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

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author testjava
 * @since 2022-06-14
 */
@RestController
@RequestMapping("/point_service")
public class PointController {
    @Autowired
    public PointService pointService;
    @GetMapping("/point")
    public String point() {
        Point point = pointService.getById("19060201111");

        return "hello,world!="+ JSON.toJSONString(point);
    }


}