springboot 集成mybatis-plus的使用

一、在spring boot中配置mybatis-plus

• 1、创建一个spring boot项目，注意勾选mysql

• 2、在pom.xml文件中添加mybatis-plus的依赖包

  
  <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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0modelVersion>
      <parent>
          <groupId>org.springframework.bootgroupId>
          <artifactId>spring-boot-starter-parentartifactId>
          <version>3.1.3version>
          <relativePath/> 
      parent>
      <groupId>com.examplegroupId>
      <artifactId>spring_mybatisartifactId>
      <version>0.0.1-SNAPSHOTversion>
      <name>spring_mybatisname>
      <description>spring_mybatisdescription>
      <properties>
          <java.version>17java.version>
      properties>
      <dependencies>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-webartifactId>
          dependency>
  
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-devtoolsartifactId>
              <scope>runtimescope>
              <optional>trueoptional>
          dependency>
          <dependency>
              <groupId>com.mysqlgroupId>
              <artifactId>mysql-connector-jartifactId>
              <scope>runtimescope>
          dependency>
          <dependency>
              <groupId>org.projectlombokgroupId>
              <artifactId>lombokartifactId>
              <optional>trueoptional>
          dependency>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-testartifactId>
              <scope>testscope>
          dependency>
          
          <dependency>
              <groupId>com.baomidougroupId>
              <artifactId>mybatis-plus-boot-starterartifactId>
              <version>3.5.3.2version>
          dependency>
          
          <dependency>
              <groupId>com.alibabagroupId>
              <artifactId>fastjsonartifactId>
              <version>2.0.40version>
          dependency>
          <dependency>
              <groupId>com.alibabagroupId>
              <artifactId>druid-spring-boot-starterartifactId>
              <version>1.2.19version>
          dependency>
          <dependency>
              <groupId>cn.hutoolgroupId>
              <artifactId>hutool-allartifactId>
              <version>5.8.21version>
          dependency>
      dependencies>
  
      <build>
          <plugins>
              <plugin>
                  <groupId>org.springframework.bootgroupId>
                  <artifactId>spring-boot-maven-pluginartifactId>
                  <configuration>
                      <excludes>
                          <exclude>
                              <groupId>org.projectlombokgroupId>
                              <artifactId>lombokartifactId>
                          exclude>
                      excludes>
                  configuration>
              plugin>
          plugins>
      build>
  
  project>
  
  

• 3、创建一个beego的数据库,并且创建一个user的表

  -- ------------------------
  -- 用户表
  -- ------------------------
  DROP TABLE IF EXISTS `user`;
  CREATE TABLE `user` (
    `id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT  COMMENT '主键id',
    `username` varchar(50) not null  COMMENT '用户名',
  	`password` varchar(100) not null COMMENT '密码',
  	`status` tinyint(4) DEFAULT '1' COMMENT '状态,0表示禁止,1表示正常',
    `created_at` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) COMMENT '创建时间',
    `updated_at` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6) COMMENT '更新时间',
    `deleted_at` timestamp(6) NULL DEFAULT NULL COMMENT '软删除时间'
  ) ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin COMMENT = "用户表";
  

• 4、在application.yml中配置mysql连接池及mybatis-plus的配置

  server:
    port: 9000
  
  
  
  spring:
    # 数据库配置
    datasource:
      url: jdbc:mysql://localhost:3306/beego?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&useSSL=false&useAffectedRows=true&serverTimezone=Asia/Shanghai
      driver-class-name: com.mysql.cj.jdbc.Driver
      username: root
      password: 123456
      type: com.alibaba.druid.pool.DruidDataSource
  
  
  #配置mybatis-plus信息
  mybatis-plus:
    configuration:
      # 开启下划线转驼峰
      map-underscore-to-camel-case: true
      auto-mapping-behavior: full
      log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    # mapping的路径
    mapper-locations: classpath*:mapper/**/*Mapper.xml
    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
        # 逻辑删除(软删除)
        logic-delete-value: NOW()
        logic-not-delete-value: 'NULL'
  

• 5、在spring boot的入口文件配置要扫描的mapper路径

  package com.example.spring_mybatis;
  
  import lombok.extern.slf4j.Slf4j;
  import org.mybatis.spring.annotation.MapperScan;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  @MapperScan(basePackages = {"com.example.spring_mybatis.mapper"})
  @Slf4j
  public class SpringMybatisApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(SpringMybatisApplication.class, args);
          log.info("服务已经启动localhost:9000");
      }
  }
  

• 6、简单运行项目,看看是否可以正常运行

二、对mybatis plus一些基本的配置

• 1、统一时间格式

  package com.example.spring_mybatis.config;
  
  import cn.hutool.core.date.DatePattern;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
  import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
  import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
  import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
  import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
  import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
  import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.stereotype.Component;
  
  import java.time.LocalDate;
  import java.time.LocalDateTime;
  import java.time.LocalTime;
  import java.time.format.DateTimeFormatter;
  
  
  
  @Component
  @Slf4j
  public class LocalDateTimeFormatConfig {
      @Bean
      public ObjectMapper objectMapper() {
          ObjectMapper objectMapper = new ObjectMapper();
          JavaTimeModule javaTimeModule = new JavaTimeModule();
          javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
          javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
          javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));
          javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
          javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
          javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));
          objectMapper.registerModule(javaTimeModule);
  
          return objectMapper;
      }
  }
  

• 2、分页器插件配置

  package com.example.spring_mybatis.config;
  
  import com.baomidou.mybatisplus.annotation.DbType;
  import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
  import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  
  
  /**
   * mybatis-plus分页插件
   */
  @Configuration
  public class MybatisPlusConfig {
      @Bean
      public MybatisPlusInterceptor mybatisPlusInterceptor() {
          MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
          interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
          return interceptor;
      }
  }
  

• 3、元数据配置,比如创建时间、更新时间、获取当前更新人等数据

  package com.example.spring_mybatis.config;
  
  import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
  import com.example.spring_mybatis.model.BaseEntity;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.ibatis.reflection.MetaObject;
  import org.springframework.stereotype.Component;
  
  import java.time.LocalDateTime;
  import java.util.Date;
  import java.util.Objects;
  
  /**
   * mybatis-plus元数据插件配置(更新时间,不在数据库层面做)
   */
  @Component
  @Slf4j
  public class MyMetaObjectHandler implements MetaObjectHandler {
      /**
       * 插入时自动填充
       *
       * @param metaObject
       */
      @Override
      public void insertFill(MetaObject metaObject) {
          if (Objects.nonNull(metaObject) && metaObject.getOriginalObject() instanceof BaseEntity) {
              BaseEntity baseEntity = (BaseEntity) metaObject.getOriginalObject();
              // 创建时间和更新时间
              if (Objects.isNull(baseEntity.getCreatedAt())) {
                  baseEntity.setCreatedAt(LocalDateTime.now());
              }
              if (Objects.isNull(baseEntity.getUpdatedAt())) {
                  baseEntity.setUpdatedAt(LocalDateTime.now());
              }
          }
  
      }
  
      /**
       * 更新时自动填充
       *
       * @param metaObject
       */
      @Override
      public void updateFill(MetaObject metaObject) {
          if (Objects.nonNull(metaObject) && metaObject.getOriginalObject() instanceof BaseEntity) {
              BaseEntity baseEntity = (BaseEntity) metaObject.getOriginalObject();
              baseEntity.setUpdatedAt(LocalDateTime.now());
          }
      }
  }
  

三、手动搭建控制器、服务层、实体类

• 1、最终项目目录结构如下

• 2、手动创建实体类去继承BaseEntity类,在BaseEntity类中书写一些基础字段

  package com.example.spring_mybatis.model;
  
  import com.baomidou.mybatisplus.annotation.*;
  import com.fasterxml.jackson.annotation.JsonFormat;
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import lombok.Data;
  
  import java.time.LocalDateTime;
  
  @Data
  public class BaseEntity {
      @TableId(value = "id", type = IdType.AUTO)
      private String id;
  
      @TableField(fill = FieldFill.INSERT)
      @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
      private LocalDateTime createdAt;
  
      @TableField(fill = FieldFill.INSERT_UPDATE)
      @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
      private LocalDateTime  updatedAt;
  
      @TableLogic
      @JsonIgnore
      private LocalDateTime  deletedAt;
  }
  

  package com.example.spring_mybatis.model;
  
  import com.baomidou.mybatisplus.annotation.*;
  import com.fasterxml.jackson.annotation.JsonFormat;
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import lombok.Data;
  import lombok.EqualsAndHashCode;
  import lombok.experimental.Accessors;
  
  import java.time.LocalDateTime;
  import java.util.Date;
  
  @Data
  @EqualsAndHashCode(callSuper = true)
  @Accessors(chain = true)
  @TableName("user")
  public class UserEntity extends BaseEntity{
      /**
       * 用户名
       */
      private String username;
  
      /**
       * 密码
       */
      private String password;
  
      /**
       * 状态:0是禁止,1是正常
       */
      private Integer status;
  
  }
  

• 3、控制器内容书写

  package com.example.spring_mybatis.controller;
  
  import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
  import com.example.spring_mybatis.dto.UserDTO;
  import com.example.spring_mybatis.model.UserEntity;
  import com.example.spring_mybatis.service.IUserService;
  import com.example.spring_mybatis.utils.R;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.*;
  
  import java.util.List;
  
  @RestController
  @RequestMapping("/api/user")
  @Slf4j
  public class UserController {
      @Autowired
      private IUserService iUserService;
  
      @PostMapping("")
      public R<String> createUser(@RequestBody UserDTO userDto) {
          log.info("进入创建用户的控制器");
          return this.iUserService.createUser(userDto);
      }
  
      @GetMapping()
      public R<List<UserEntity>> getUser() {
          List<UserEntity> list = this.iUserService.list();
          return R.success(list);
      }
  
      @DeleteMapping("/{id}")
      public R<String> deleteUserById(@PathVariable Long id){
          System.out.println("接收到参数:"+id);
          LambdaQueryWrapper<UserEntity> queryWrapper = new LambdaQueryWrapper<>();
          queryWrapper.eq(UserEntity::getId,id);
          boolean affected = iUserService.remove(queryWrapper);
          if (affected) {
              return R.success("删除成功");
          } else {
              return R.error("删除失败");
          }
      }
  }
  
  

• 4、服务层接口

  package com.example.spring_mybatis.service;
  
  import com.baomidou.mybatisplus.extension.service.IService;
  import com.example.spring_mybatis.dto.UserDTO;
  import com.example.spring_mybatis.model.UserEntity;
  import com.example.spring_mybatis.utils.R;
  
  public interface IUserService extends IService<UserEntity> {
      R<String> createUser(UserDTO userDto);
  }
  

• 5、服务层

  package com.example.spring_mybatis.service.impl;
  
  
  import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
  import com.example.spring_mybatis.dto.UserDTO;
  import com.example.spring_mybatis.mapper.UserMapper;
  import com.example.spring_mybatis.model.UserEntity;
  import com.example.spring_mybatis.service.IUserService;
  import com.example.spring_mybatis.utils.R;
  import org.springframework.beans.BeanUtils;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  @Service
  public class UserServiceImpl extends ServiceImpl<UserMapper, UserEntity> implements IUserService {
      @Autowired
      private UserMapper userMapper;
  
      @Override
      public R<String> createUser(UserDTO userDto) {
          UserEntity userEntity = new UserEntity();
          BeanUtils.copyProperties(userDto, userEntity);
          int insert = this.userMapper.insert(userEntity);
          if (insert == 1) {
              return R.success("创建成功");
          } else {
              return R.error("创建失败");
          }
      }
  }
  

• 6、mapper层的书写

  package com.example.spring_mybatis.mapper;
  
  import com.baomidou.mybatisplus.core.mapper.BaseMapper;
  import com.example.spring_mybatis.model.UserEntity;
  import org.springframework.stereotype.Repository;
  
  @Repository
  public interface UserMapper extends BaseMapper<UserEntity> {
  }
  
  

• 7、UserMapper.xml的书写

  
  DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  <mapper namespace="com.example.spring_mybatis.mapper.UserMapper">
      
      <resultMap id="BaseResultMap" type="com.example.spring_mybatis.model.UserEntity">
          <result column="id" property="id"/>
          <result column="created_at" property="createdAt"/>
          <result column="updated_at" property="updatedAt"/>
          <result column="deleted_at" property="deletedAt"/>
          <result column="username" property="username"/>
          <result column="password" property="password"/>
          <result column="status" property="status"/>
      resultMap>
  mapper>
  
  

• 8、运行代码,使用postman调试是否可以创建成功

四、模板生成器的使用

• 1、官方地址

• 2、使用上面的方式要一个一个文件夹去创建比较费力,下面讲解模板生成器的使用

• 3、安装依赖包

  
  <dependency>
      <groupId>com.baomidougroupId>
      <artifactId>mybatis-plus-generatorartifactId>
      <version>3.5.3.1version>
  dependency>
  
  <dependency>
      <groupId>org.springframework.bootgroupId>
      <artifactId>spring-boot-starter-freemarkerartifactId>
  dependency>
  

• 4、创建一个CodeGenerator的文件

  package com.example.spring_mybatis;
  
  import com.baomidou.mybatisplus.annotation.IdType;
  import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
  import com.baomidou.mybatisplus.core.toolkit.StringUtils;
  import com.baomidou.mybatisplus.generator.AutoGenerator;
  import com.baomidou.mybatisplus.generator.FastAutoGenerator;
  import com.baomidou.mybatisplus.generator.config.*;
  import com.baomidou.mybatisplus.generator.config.builder.CustomFile;
  import com.baomidou.mybatisplus.generator.config.rules.DateType;
  import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
  import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
  import com.example.spring_mybatis.model.BaseEntity;
  
  import java.text.MessageFormat;
  import java.util.*;
  
  public class CodeGenerator {
      private final static String DB_USERNAME = "root";
      private final static String DB_HOST = "localhost";
      private final static String DB_PORT = "3306";
      private final static String DB_PASSWORD = "123456";
      private final static String DB_DATABASE = "beego";
      private final static String PROJECT_PATH = "com/example/spring_mybatis";
  //    private final static String PROJECT_PATH = System.getProperty("user.dir");
  
      public static void main(String[] args) {
          System.out.println(System.getProperty("user.dir"));
          // 数据源配置
          FastAutoGenerator fastAutoGenerator = FastAutoGenerator.create(MessageFormat.format("jdbc:mysql://{0}:{1}/{2}?serverTimezone=GMT%2B8", DB_HOST, DB_PORT, DB_DATABASE), DB_USERNAME, DB_PASSWORD)
                  // 1.全局配置
                  .globalConfig(builder -> {
                      builder.author("水痕")        // 设置作者
  //                            .enableSwagger()        // 开启 swagger 模式 默认值:false
                              .disableOpenDir()       // 禁止打开输出目录 默认值:true
                              .commentDate("yyyy-MM-dd HH:mm:ss") // 注释日期
                              .fileOverride() // 覆盖之前的文件
                              .dateType(DateType.ONLY_DATE)   //定义生成的实体类中日期类型 DateType.ONLY_DATE 默认值: DateType.TIME_PACK
                              .outputDir(System.getProperty("user.dir") + "/src/main/java"); // 指定输出目录
  
                  })
                  // 2.包配置
                  .packageConfig(builder -> {
                      builder.parent(PROJECT_PATH.replace("/", ".")) // 父包模块名
                              .pathInfo(getPathInfo())
                              .controller("controller")   //Controller 包名 默认值:controller
                              .entity("model")           //Entity 包名 默认值:entity
                              .service("service")         //Service 包名 默认值:service
                              .mapper("mapper")           //Mapper 包名 默认值:mapper
                              // .other("model")
                              //.moduleName("xxx")        // 设置父包模块名 默认值:无
                              .pathInfo(Collections.singletonMap(OutputFile.xml, System.getProperty("user.dir") + "/src/main/resources/mapper")); // 设置mapperXml生成路径
                      //默认存放在mapper的xml下
                  })
  //                .injectionConfig(consumer -> {
  //                    // Map customFile = new HashMap<>();
  //                    // DTO 下面的key会作为类名后缀，进而生成新类
                      customFile.put("DTO.java", "templates/other/dto.java.vm");
                      customFile.put("VO.java", "templates/other/vo.java.vm");
                      consumer.customFile(customFile);
  //                    String basePath = System.getProperty("user.dir");
  //                    List customFiles = new ArrayList<>();
  //                    customFiles.add(new CustomFile.Builder().fileName("DTO.java")
  //                            .templatePath("templates/other/dto.java.vm")
  //                            .filePath(basePath+"/src/main/java/"+PROJECT_PATH+"/dto").build());
  //                    customFiles.add(new CustomFile.Builder().fileName("VO.java")
  //                            .templatePath("templates/other/vo.java.vm")
  //                            .filePath(basePath+"/src/main/java/"+PROJECT_PATH+"/vo").build());
  //                    consumer.customFile(customFiles);
  //
  //                })
                  // 策略配置
                  .strategyConfig(builder -> {
                      builder.addInclude(scanner("表名，多个英文逗号分割").split(","))
                              //service策略配置
                              .serviceBuilder()
                              .formatServiceFileName("I%sService")
                              .formatServiceImplFileName("%sServiceImpl")
                              // 实体类策略配置
                              .entityBuilder()
                              .formatFileName("%sEntity")
  //                            .idType(IdType.ASSIGN_ID)//主键策略  雪花算法自动生成的id
  //                            .addTableFills(new Column("created_at", FieldFill.INSERT)) // 自动填充配置
  //                            .addTableFills(new Property("updated_at", FieldFill.INSERT_UPDATE))
                              .enableLombok() //开启lombok
  //                            .logicDeleteColumnName("deleted_at")// 说明逻辑删除是哪个字段
  //                             .formatFileName("%sEntity")
                              .superClass(BaseEntity.class)
                              .addSuperEntityColumns("id", "created_at", "updated_at", "deleted_at") // 公共字段不需要抽取
                              .enableTableFieldAnnotation()// 属性加上注解说明
                              // 关于控制器的
                              .controllerBuilder() //controller 策略配置
                              .formatFileName("%sController")
  
                              .enableRestStyle() // 开启RestController注解
                              // 关于mapper的
                              .mapperBuilder()// mapper策略配置
                              .formatMapperFileName("%sMapper")
  //                            .enableMapperAnnotation()//@mapper注解开启
                              .formatXmlFileName("%sMapper");
                  }).templateEngine(new FreemarkerTemplateEngine());
          // 使用Freemarker引擎模板，默认的是Velocity引擎模板
  //
          fastAutoGenerator.execute();
          System.out.println("生成模板成功");
      }
  
      private static String scanner(String tip) {
          Scanner scanner = new Scanner(System.in);
          StringBuilder help = new StringBuilder();
          help.append("请输入" + tip + ":");
          System.out.println(help);
          if (scanner.hasNext()) {
              String ipt = scanner.next();
              if (StringUtils.isNotEmpty(ipt)) {
                  return ipt;
              }
          }
          throw new MybatisPlusException("请输入正确的" + tip + "！");
      }
  
      /**
       * 配置生成路径
       *
       * @return
       */
      private static Map<OutputFile, String> getPathInfo() {
          Map<OutputFile, String> pathInfo = new HashMap<>();
          String path = "/src/main/java/" + PROJECT_PATH;
          pathInfo.put(OutputFile.entity, System.getProperty("user.dir") + path + "/model");
          pathInfo.put(OutputFile.mapper, System.getProperty("user.dir") + path + "/mapper");
          pathInfo.put(OutputFile.service, System.getProperty("user.dir") + path + "/service");
          pathInfo.put(OutputFile.serviceImpl, System.getProperty("user.dir") + path + "/service/impl");
          pathInfo.put(OutputFile.controller, System.getProperty("user.dir") + path + "/controller");
          pathInfo.put(OutputFile.xml, System.getProperty("user.dir") + "/src/main/resources/mapper");
          return pathInfo;
      }
  }
  

• 5、运行文件输入表名,一件生成上面的代码文件

五、自定义模板来实现简单的增删改查操作

• 1、导入依赖包

  
  <dependency>
      <groupId>org.hibernate.validatorgroupId>
      <artifactId>hibernate-validatorartifactId>
  dependency>
  
  <dependency>
      <groupId>com.baomidougroupId>
      <artifactId>mybatis-plus-generatorartifactId>
      <version>3.5.3.1version>
  dependency>
  
  <dependency>
      <groupId>org.apache.velocitygroupId>
      <artifactId>velocity-engine-coreartifactId>
      <version>2.3version>
  dependency>
  
  <dependency>
      <groupId>org.springframework.bootgroupId>
      <artifactId>spring-boot-starter-freemarkerartifactId>
  dependency>
  

• 2、直接参考代码,代码见