Mybatis-Plus主要功能详解

一、Mybatis-plus IService接口使用

1、IService介绍

IService里面已经提供了很多常用方法，比如批量保存、批量更新等。只需要配置好直接调用就可以。

    default boolean save(T entity) {
        return SqlHelper.retBool(this.getBaseMapper().insert(entity));
    }

    @Transactional(
        rollbackFor = {Exception.class}
    )
    default boolean saveBatch(Collection<T> entityList) {
        return this.saveBatch(entityList, 1000);
    }

    boolean saveBatch(Collection<T> entityList, int batchSize);

    @Transactional(
        rollbackFor = {Exception.class}
    )
    default boolean saveOrUpdateBatch(Collection<T> entityList) {
        return this.saveOrUpdateBatch(entityList, 1000);
    }
    ...

2、IService使用配置

• 创建SysUserMapper继承BaseMapper

@Repository("sysUserMapper")
public interface SysUserMapper extends BaseMapper<SysUser> {
}

• 创建SysUserService继承ServiceImpl

@Component
public class SysUserService extends ServiceImpl<SysUserMapper,SysUser> {
}

3、IService调用保存

 public void insert() {
        List<SysUser> sysUsers = new ArrayList<>();
        for (int i=1;i<100;i++) {
            SysUser sysUser = new SysUser();
            sysUser.setUsername("长伞");
            sysUser.setPassword("123456");
            sysUsers.add(sysUser);
        }
        sysUserService.saveBatch(sysUsers);
    }

二、Mybatis-plus 插件使用

• 分页插件 PaginationInnerInterceptor
• 乐观锁插件OptimisticLockerInnerInterceptor

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
        return interceptor;
    }

具体详细代码请参考GitHub：mybatis-plus