一、修改根目录 pom.xml

添加：

<properties>
    <mybatis-plus.version>3.5.3.1</mybatis-plus.version>
    <lombok.version>1.18.24</lombok.version>
</properties>

和

<!-- mybatis-plus -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>${mybatis-plus.version}</version>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>${lombok.version}</version>
</dependency>

二、修改 ruoyi-common-core 的 pom.xml

<!-- mybatis-plus -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>

三、去掉 nacos 配置文件中的 mybatis 配置，添加 mybatis-plus 配置

# mybatis配置
# mybatis:
#     # 搜索指定包别名
#     typeAliasesPackage: com.ruoyi.system
#     # 配置mapper的扫描，找到所有的mapper.xml映射文件
#     mapperLocations: classpath:mapper/**/*.xml

# mybatis-plus配置
mybatis-plus:
    # 搜索指定包别名
    typeAliasesPackage: com.ruoyi.*
    # 配置mapper的扫描，找到所有的mapper.xml映射文件
    mapper-locations: classpath:mapper/**/*.xml

四、添加配置类并注入

config 目录和 配置类 MybatisPlusConfig 均为新增：

MybatisPlusConfig.java 内容如下：

package com.ruoyi.common.core.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.BlockAttackInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * Mybatis Plus 配置
 *
 * @author ruoyi
 */
@EnableTransactionManagement(proxyTargetClass = true)
@Configuration
public class MybatisPlusConfig
{
    
    
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor()
    {
    
    
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 分页插件
        interceptor.addInnerInterceptor(paginationInnerInterceptor());
        // 乐观锁插件
        interceptor.addInnerInterceptor(optimisticLockerInnerInterceptor());
        // 阻断插件
        interceptor.addInnerInterceptor(blockAttackInnerInterceptor());
        return interceptor;
    }

    /**
     * 分页插件，自动识别数据库类型 https://baomidou.com/guide/interceptor-pagination.html
     */
    public PaginationInnerInterceptor paginationInnerInterceptor()
    {
    
    
        PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor();
        // 设置数据库类型为mysql
        paginationInnerInterceptor.setDbType(DbType.MYSQL);
        // 设置最大单页限制数量，默认 500 条，-1 不受限制
        paginationInnerInterceptor.setMaxLimit(-1L);
        return paginationInnerInterceptor;
    }

    /**
     * 乐观锁插件 https://baomidou.com/guide/interceptor-optimistic-locker.html
     */
    public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor()
    {
    
    
        return new OptimisticLockerInnerInterceptor();
    }

    /**
     * 如果是对全表的删除或更新操作，就会终止该操作 https://baomidou.com/guide/interceptor-block-attack.html
     */
    public BlockAttackInnerInterceptor blockAttackInnerInterceptor()
    {
    
    
        return new BlockAttackInnerInterceptor();
    }
}

五、注入类

注入内容为：

com.ruoyi.common.core.config.MybatisPlusConfig

六、启动验证