使用MyBatis-Plus快速生成代码-优快云博客

代码生成器

1.创建数据库，配置连接数据库

2.导入依赖

  <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>
        <!--3.mybatis-plus  版本很重要3.0.5-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.5</version>
        </dependency>
        <!--模板引擎 依赖:mybatis-plus代码生成的时候报异常-->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.0</version>
        </dependency>
        <!--配置ApiModel在实体类中不生效-->
        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>spring-boot-starter-swagger</artifactId>
            <version>1.5.1.RELEASE</version>
        </dependency>

配置类

config - MyBatisPlusConfig

package com.tian.config;

//扫描mapper文件夹
@MapperScan("com.tian.mapper")//交给mybatis做的，可以让这个配置类做扫描
@EnableTransactionManagement//自动管理事务
@Configuration//配置类
public class MyBatisPlusConfig {
    //注册乐观锁插件
    @Bean
    public OptimisticLockerInterceptor optimisticLockerInterceptor(){
        return new OptimisticLockerInterceptor();
    }
    //分页插件
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
    //逻辑删除组件
    @Bean
    public ISqlInjector sqlInjector(){
        return new LogicSqlInjector();
    }
    //性能分析插件
    @Bean
    @Profile({"dev","test"})//设置dev开发、test测试 环境开启  保证我们的效率
    public PerformanceInterceptor performanceInterceptor(){
        PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
        performanceInterceptor.setMaxTime(100);//设置sql最大执行时间*ms，如果超过了则不执行
        performanceInterceptor.setFormat(true);//开启sql格式化
        return performanceInterceptor;
    }
}

4.编写代码生成器

package com.tian;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.FieldFill;
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.po.TableFill;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import java.util.ArrayList;
//代码自动生成器
public class TianCode {
    public static void main(String[] args) {
        //我们需要构建一个代码生成器对象
        AutoGenerator mpg = new AutoGenerator();
        //怎么样去执行，配置策略
        //1、全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");//获取当前目录
        gc.setOutputDir(projectPath+"/src/main/java");//输出到哪个目录
        gc.setAuthor("Tian");
        gc.setOpen(false);
        gc.setFileOverride(false);//是否覆盖
        gc.setServiceName("%sService");//去Service的I前缀
        gc.setIdType(IdType.ID_WORKER);
        gc.setDateType(DateType.ONLY_DATE);
        gc.setSwagger2(true);
        mpg.setGlobalConfig(gc);
        //2、设置数据源
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUsername("root");
        dsc.setPassword("root");
        dsc.setUrl("jdbc:mysql://localhost:3306/blog?useSSL=false&serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);
        //3、包的配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName("blog");
        pc.setParent("com.tian");
        pc.setEntity("pojo");
        pc.setMapper("mapper");
        pc.setService("service");
        pc.setController("controller");
        mpg.setPackageInfo(pc);
        //4、策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setInclude("t_tag","t_user","t_comment","t_type");//设置要映射的表名,只需改这里即可
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setEntityLombokModel(true);//是否使用lombok开启注解
        strategy.setLogicDeleteFieldName("deleted");
        //自动填充配置
        TableFill gmtCreate = new TableFill("gmt_create", FieldFill.INSERT);
        TableFill gmtUpdate = new TableFill("gmt_update", FieldFill.INSERT_UPDATE);
        ArrayList<TableFill> tableFills = new ArrayList<>();
        tableFills.add(gmtCreate);
        tableFills.add(gmtUpdate);
        strategy.setTableFillList(tableFills);
        //乐观锁配置
        strategy.setVersionFieldName("version");
        strategy.setRestControllerStyle(true);//开启驼峰命名
        strategy.setControllerMappingHyphenStyle(true);//localhost:8080/hello_id_2
        mpg.setStrategy(strategy);
        mpg.execute();//执行
    }
}