导入依赖

<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>3.3.2</version>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-generator</artifactId>
			<version>3.3.2</version>
		</dependency>
		<dependency>
			<groupId>org.apache.velocity</groupId>
			<artifactId>velocity-tools</artifactId>
			<version>2.0</version>
		</dependency>
		<!--swagger-->
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
			<version>2.7.0</version>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger-ui</artifactId>
			<version>2.7.0</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>

创建自动生成代码类CodeGenerator (放在test目录下就可以)

public class CodeGenerator {
    /**
     * <p>
     * 读取控制台内容
     * </p>
     */

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("jobob");
        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
        gc.setServiceName("%sService"); 	//去掉Service接口的首字母I
        gc.setIdType(IdType.ASSIGN_UUID);//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); //实体属性 Swagger2 注解
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/ceshi?serverTimezone=GMT%2B8&useUnicode=true&useSSL=false&characterEncoding=utf8");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("root");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName("genaral");
        pc.setParent("com.edu");
        mpg.setPackageInfo(pc);


        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel); //数据库表映射到实体的命名策略
        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);
        strategy.setRestControllerStyle(true); //restful api风格控制器
        strategy.setInclude("edu_teacher".split(",")); // 设置表名
        strategy.setControllerMappingHyphenStyle(true);  //url中驼峰转连字符
        strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀
        mpg.setStrategy(strategy);

        mpg.execute();
    }

}

设置自动填充 (创建时间和更新时间）

1.需要创建一个配置类

@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        this.setFieldValByName("createTime",new Date(),metaObject);
        this.setFieldValByName("updateTime",new Date(),metaObject);
    }


    @Override
    public void updateFill(MetaObject metaObject) {
        this.setFieldValByName("updateTime", new Date(),metaObject);
    }
}

2.第二步 在实体类对应的 createTime 和 updateTime 属性上面加上注解

public class User {

    // 注意！这里需要标记为填充字段
      @ApiModelProperty(value = "创建时间")
      @TableField(fill = FieldFill.INSERT)
      private Date createTime;

      @ApiModelProperty(value = "更新时间")
      @TableField(fill = FieldFill.INSERT_UPDATE)
      private Date updateTime;
    ....
}

逻辑删除 在application.yml配置文件中配置

mybatis-plus:
  global-config:
    db-config:
      logic-delete-field: flag  # 全局逻辑删除的实体字段名(since 3.3.0,配置后可以忽略不配置步骤2)
      logic-delete-value: 1 # 逻辑已删除值(默认为 1)
      logic-not-delete-value: 0 # 逻辑未删除值(默认为 0)

乐观锁 和 分页插件

1.创建配置类 注入

@Configuration
public class MybatisPlusConfig {

@Bean
public OptimisticLockerInterceptor optimisticLockerInterceptor() {
    return new OptimisticLockerInterceptor();
}
//分页插件
@Bean
public PaginationInterceptor paginationInterceptor() {
    return new PaginationInterceptor();
}

}

	2.注解实体字段 @Version 必须要!
	

```handlebars
@Version
private Integer version;

swagger2 的配置类

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket webApiConfig(){
        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("webApi")
                .apiInfo(webApiInfo())
                .select()
                .paths(Predicates.not(PathSelectors.regex("/admin/.*")))
                .paths(Predicates.not(PathSelectors.regex("/error.*")))
                .build();
    }

    private ApiInfo webApiInfo(){
        return new ApiInfoBuilder()
                .title("网站-课程中心API文档")
                .description("本文档描述了项目的接口定义")
                .version("1.0")
                .contact(new Contact("chao", "hocalhost", "491938644@qq.com"))
                .build();

    }
}

server:
  port: 8888
spring:
  application:
    name: service-edu
  profiles:
    active: dev
  datasource:
    url: jdbc:mysql://localhost:3306/ceshi?serverTimezone=GMT%2B8
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    time-zone: GMT+8
mybatis-plus:
  global-config:
    db-config:
      logic-delete-field: flag 
      logic-delete-value: 1 
      logic-not-delete-value: 0 
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
# mapper-locations: classpath:/com/edu/genaral/mapper/xml/*.xml