MyBatis-Plus

发表于 2025-03-06 本文字数 3.1k 字阅读时长 3 分钟

# 快速开始

# 安装

Maven


<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-spring-boot3-starter</artifactId>
    <version>3.5.7</version>
</dependency>

# 配置

application.yml


# DataSource Config
spring:
  datasource:
    driver-class-name: org.h2.Driver
    username: root
    password: test
  sql:
    init:
      schema-locations: classpath:db/schema-h2.sql
      data-locations: classpath:db/data-h2.sql

在 Spring Boot 启动类中添加 @MapperScan 注解，扫描 Mapper 文件夹


@SpringBootApplication
@MapperScan("com.baomidou.mybatisplus.samples.quickstart.mapper")
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

# 代码生成器

# xml


<!--        代码生成-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.7</version>
</dependency>
        <!--        生成器附带-->
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>2.3</version>
</dependency>

# 代码



import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.OutputFile;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;


import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class CodeGenerator {
    // 处理 all 情况
    protected static List<String> getTables(String tables) {
        return "all".equals(tables) ? Collections.emptyList() : Arrays.asList(tables.split(","));
    }

    public static void main(String[] args) {
        FastAutoGenerator.create("jdbc:mysql://127.0.0.1:3306/fluffy", "root", "1234")
                // 全局配置
                .globalConfig((scanner, builder) -> {
                    //设置注释信息-作者
                    builder.author(scanner.apply("请输入作者名称？"));
                    //设置swagger注解
                    //builder.enableSwagger();
                    //设置代码生成的路径
                    builder.outputDir(System.getProperty("user.dir")+"/src/main/java");
                })
                // 包配置
                .packageConfig((scanner, builder) -> {
                    builder.parent(scanner.apply("请输入包名？"))
                            //设置xml文件路径
                            .pathInfo(Collections.singletonMap(OutputFile.xml, System.getProperty("user.dir")+"/src/main/resources/mapper"));
                })
                // 策略配置
                .strategyConfig((scanner, builder) -> {
                    builder.addInclude(CodeGenerator.getTables(scanner.apply("请输入表名，多个英文逗号分隔？所有输入 all")))
                            .controllerBuilder().enableRestStyle().enableHyphenStyle().build();
                    builder.serviceBuilder()
                            .formatServiceFileName("%sService")
                            .formatServiceImplFileName("%sServiceImp")
                            .build();
                    //entity的策略配置
                    builder.entityBuilder()
                            //启用Lombok插件
                            .enableLombok()
                            .enableTableFieldAnnotation()
                            .versionColumnName("version")
                            .logicDeleteColumnName("is_delete")
                            //设置字段名的命名策略为下划线转驼峰命名
                            .columnNaming(NamingStrategy.underline_to_camel)
                            //主键策略递增
                            .idType(IdType.AUTO)
                            .formatFileName("%sEntity")
                            .build();
                })
                .execute();
    }
}

spring boot MyBatis-Plus